Mercurial > repos > simple16
annotate simple16.html @ 45:5338b9affd09
Updated HTML documentation to reflect CPU changes
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Mon, 29 Aug 2016 21:17:41 -0700 |
| parents | a64e11e48a41 |
| children | 5f30c4d18d79 |
| rev | line source |
|---|---|
| 39 | 1 <!doctype html> |
| 2 <html> | |
| 3 <head> | |
| 4 <style> | |
| 5 body { | |
| 6 font-family: Helvetica, Arial, sans-serif; | |
| 7 } | |
| 8 </style> | |
| 9 </head> | |
| 10 <body> | |
| 11 <h1>Simple 16</h1> | |
| 12 <p> | |
| 13 Simple 16 is a toy 16-bit video game console designed with simplicity of implementation in mind. While it is technically a 16-bit system, | |
| 14 it's capabilites are in many ways closer to an 8-bit system. Ultimately, the hope is that Simple 16 is simple enough to provide an easy | |
| 15 introduction for the novice emudev while still containing all the essential features of an older game console. | |
| 16 | |
| 17 </p> | |
| 18 <h2>Table of Contents</h2> | |
| 19 <ul> | |
| 20 <li><a href="#cpu">CPU</a> | |
| 21 <ul> | |
| 22 <li><a href="#cpuover">Overview</a></li> | |
| 23 <li><a href="#cpuregs">Registers</a></li> | |
| 24 <li><a href="#instructions">Instructions</a></li> | |
| 25 <li><a href="#execution">Execution Details</a></li> | |
| 26 <li><a href="#interrupts">Exceptions and Interrupts</a></li> | |
| 27 </ul> | |
| 28 </li> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
29 <li><a href="#video">Video</a> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
30 <ul> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
31 <li><a href="#vidover">Overview</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
32 <li><a href="#vidregs">IO Ports</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
33 <li><a href="#vidmem">Memory Map</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
34 <li><a href="#vidrender">Rendering</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
35 </ul> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
36 </li> |
| 39 | 37 <li><a href="#audio">Audio</a></li> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
38 <ul> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
39 <li><a href="#audover">Overview</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
40 <li><a href="#audregs">IO Ports</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
41 </ul> |
| 39 | 42 <li><a href="#timer">Timer</a></li> |
| 43 <li><a href="#controllers">Controllers</a></li> | |
| 44 <li><a href="#serial">Serial Port</a></li> | |
| 45 <li><a href="#cart">Cartridge</a></li> | |
| 46 </ul> | |
| 47 <h2 id="cpu">CPU</h2> | |
| 48 <h3 id="cpuover">Overview</h3> | |
| 49 <p> | |
| 50 The Simple 16 CPU is a 16-bit RISC design. It has a main register file of 16 16-bit registers. Additionally, there are five special | |
| 51 purpose registers dedicated to exception processing. It has a flag 16-bit addres space. Instructions are a fixed size and are also 16-bits. | |
| 52 </p> | |
| 53 <h3 id="cpuregs">Registers</h3> | |
| 54 <p> | |
| 55 The first 14 registers in the main file have no fixed function and are named r0 through r13. r14 serves as the program counter and | |
| 56 points to the next instruction to be fetched. More information about instruction fetch and execution can be found in | |
| 57 <a href="#execution">Execution Details</a>. r15 serves as the status register. The status register contains bits corresponding | |
| 58 to the result of the last arithmetic instruction and the interrupt mask. The layout of the status register is given below. | |
| 59 </p> | |
| 60 <table> | |
| 61 <tr> | |
| 62 <th>Bit</th> | |
| 63 <th>Use</th> | |
| 64 <th>Notes</th> | |
| 65 <tr> | |
| 66 <td>15-5</td> | |
| 67 <td>Unused</td> | |
| 68 <td>Should be set to zero.</td> | |
| 69 </tr> | |
| 70 <tr> | |
| 71 <td>4</td> | |
| 72 <td>Negative Flag</td> | |
| 73 <td>Indicates the last result was negative.</td> | |
| 74 </tr> | |
| 75 <tr> | |
| 76 <td>3</td> | |
| 77 <td>Carry Flag</td> | |
| 78 <td>Generally indicates a carry out of bit 15. Last bit shifted out for shift instructions.</td> | |
| 79 </tr> | |
| 80 <tr> | |
| 81 <td>2</td> | |
| 82 <td>Zero fFag</td> | |
| 83 <td>Indicates the last result was zero.</td> | |
| 84 </tr> | |
| 85 <tr> | |
| 86 <td>1</td> | |
| 87 <td>Interrupt 1 enable</td> | |
| 88 <td>Interrupt 1 can be taken when this bit is set.</td> | |
| 89 </tr> | |
| 90 <tr> | |
| 91 <td>0</td> | |
| 92 <td>Interrupt 0 enable</td> | |
| 93 <td>Interrupt 0 can be taken when this bit is set.</td> | |
| 94 </tr> | |
| 95 </table> | |
| 96 <h3 id="instructions">Instructions</h3> | |
| 97 <ul> | |
| 98 <li><a href="#ldim">ldim IM, rD</a></li> | |
| 99 <li><a href="#ldimh">ldimh IM, rD</a></li> | |
| 100 <li><a href="#ld8">ld8 rA, rB, rD</a></li> | |
| 101 <li><a href="#ld16">ld16 rA, rB, rD</a></li> | |
| 102 <li><a href="#str8">str8 rA, rB, rD</a></li> | |
| 103 <li><a href="#str16">str16 rA, rB, rD</a></li> | |
| 104 <li><a href="#add">add rA, rB, rD</a></li> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
105 <li><a href="#adc">adc rA, rB, rD</a></li> |
| 39 | 106 <li><a href="#and">and rA, rB, rD</a></li> |
| 107 <li><a href="#or">or rA, rB, rD</a></li> | |
| 108 <li><a href="#xor">xor rA, rB, rD</a></li> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
109 <li><a href="#lsl">lsl rA, rB, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
110 <li><a href="#lsr">lsr rA, rB, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
111 <li><a href="#asr">asr rA, rB, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
112 <li><a href="#bcc">bCC LABEL</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
113 <li><a href="#mov">mov rA, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
114 <li><a href="#neg">neg rA, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
115 <li><a href="#not">not rA, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
116 <li><a href="#cmp">cmp rA, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
117 <li><a href="#call">call rA, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
118 <li><a href="#swap">swap rA, rD</a></li> |
|
45
5338b9affd09
Updated HTML documentation to reflect CPU changes
Michael Pavone <pavone@retrodev.com>
parents:
42
diff
changeset
|
119 <li><a href="#longjmp">longjmp</a></li> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
120 <li><a href="#ini">ini IM, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
121 <li><a href="#outi">outi IM, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
122 <li><a href="#addi">addi IM, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
123 <li><a href="#andi">andi IM, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
124 <li><a href="#ori">ori IM, rD</a></li> |
|
45
5338b9affd09
Updated HTML documentation to reflect CPU changes
Michael Pavone <pavone@retrodev.com>
parents:
42
diff
changeset
|
125 <li><a href="#xori">xori IM, rD</a></li> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
126 <li><a href="#lsli">lsli IM, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
127 <li><a href="#lsri">lsri IM, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
128 <li><a href="#cmpi">cmpi IM, rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
129 <li><a href="#reti">reti rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
130 <li><a href="#trapi">trapi IM</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
131 <li><a href="#getepc">getepc rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
132 <li><a href="#setepc">setepc rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
133 <li><a href="#getesr">getesr rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
134 <li><a href="#setesr">setser rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
135 <li><a href="#geteur">geteur rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
136 <li><a href="#seteur">seteur rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
137 <li><a href="#getenum">getenum rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
138 <li><a href="#setenum">setenum rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
139 <li><a href="#getvbr">getvbr rD</a></li> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
140 <li><a href="#setvbr">setvbr rD</a></li> |
| 39 | 141 </ul> |
| 142 <h4 id="ldim">ldim IM, rD</h4> | |
| 143 <p> | |
| 144 ldim sign extends an 8-bit immediate value to 16-bits and assigns it to the designated register. | |
| 145 </p> | |
| 146 <p> | |
| 147 <strong>Flags:</strong> No change | |
| 148 </p> | |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
149 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
150 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
151 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
152 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
153 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
154 <th>11-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
155 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
156 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
157 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
158 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
159 <td>8-bit immediate value</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
160 <td>$0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
161 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
162 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
163 </p> |
| 39 | 164 <h4 id="ldimh">lidmh IM, rD</h4> |
| 165 <p> | |
| 166 ldimh assigns an 8-bit immediate value to the upper 8-bits of rD. | |
| 167 </p> | |
| 168 <p> | |
| 169 <strong>Flags:</strong> No change | |
| 170 </p> | |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
171 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
172 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
173 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
174 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
175 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
176 <th>11-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
177 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
178 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
179 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
180 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
181 <td>8-bit immediate value</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
182 <td>$1</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
183 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
184 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
185 </p> |
| 39 | 186 <h4 id="ld8">ld8 rA, rB, rD</h4> |
| 187 <p> | |
| 188 Reads a byte from the address indicated by the sum of rA and rB and loads it into rD | |
| 189 </p> | |
| 190 <p> | |
| 191 <strong>Flags:</strong> No change | |
| 192 </p> | |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
193 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
194 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
195 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
196 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
197 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
198 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
199 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
200 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
201 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
202 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
203 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
204 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
205 <td>Source B register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
206 <td>$2</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
207 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
208 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
209 </p> |
| 39 | 210 <h4 id="ld16">ld16 rA, rB, rD</h4> |
| 211 <p> | |
| 212 Reads a word from the address indicated by the sum of rA and rB and loads it into rD | |
| 213 </p> | |
| 214 <p> | |
| 215 <strong>Flags:</strong> No change | |
| 216 </p> | |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
217 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
218 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
219 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
220 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
221 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
222 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
223 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
224 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
225 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
226 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
227 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
228 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
229 <td>Source B register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
230 <td>$3</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
231 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
232 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
233 </p> |
| 39 | 234 <h4 id="str8">str8 rA, rB, rD</h4> |
| 235 <p> | |
| 236 Writes the byte stored in rD to the address indicated by the sum of rA and rB. | |
| 237 </p> | |
| 238 <p> | |
| 239 <strong>Flags:</strong> No change | |
| 240 </p> | |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
241 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
242 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
243 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
244 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
245 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
246 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
247 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
248 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
249 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
250 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
251 <td>Register containing value to write (aka rD)</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
252 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
253 <td>Source B register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
254 <td>$4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
255 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
256 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
257 </p> |
| 39 | 258 <h4 id="str16">str16 rA, rB, rD</h4> |
| 259 <p> | |
| 260 Writes the word stored in rD to the address indicated by the sum of rA and rB. | |
| 261 </p> | |
| 262 <p> | |
| 263 <strong>Flags:</strong> No change | |
| 264 </p> | |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
265 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
266 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
267 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
268 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
269 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
270 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
271 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
272 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
273 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
274 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
275 <td>Register containing value to write (aka rD)</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
276 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
277 <td>Source B register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
278 <td>$5</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
279 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
280 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
281 </p> |
| 39 | 282 <h4 id="add">add rA, rB, rD</h4> |
| 283 <p> | |
| 284 Adds rA and rB. The result is stored in rD. | |
| 285 </p> | |
| 286 <p> | |
| 287 <strong>Flags:</strong> C = carry out of bit 15, N = result is negative, Z = result is zero | |
| 288 </p> | |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
289 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
290 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
291 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
292 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
293 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
294 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
295 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
296 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
297 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
298 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
299 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
300 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
301 <td>Source B register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
302 <td>$6</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
303 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
304 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
305 </p> |
| 39 | 306 <h4 id="adc">adc rA, rB, rD</h4> |
| 307 <p> | |
| 308 Adds rA, rB and the carry flag. The result is stored in rD. | |
| 309 </p> | |
| 310 <p> | |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
311 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
312 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
313 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
314 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
315 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
316 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
317 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
318 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
319 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
320 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
321 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
322 <td>Source B register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
323 <td>$7</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
324 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
325 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
326 </p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
327 <p> |
| 39 | 328 <strong>Flags:</strong> C = carry out of bit 15, N = result is negative, Z = result is zero |
| 329 </p> | |
| 330 <h4 id="and">and rA, rB, rD</h4> | |
| 331 <p> | |
| 332 Bitwise and of rA and rB is stored in rD. | |
| 333 </p> | |
| 334 <p> | |
| 335 <strong>Flags:</strong> C = unmodified, N = result is negative, Z = result is zero | |
| 336 </p> | |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
337 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
338 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
339 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
340 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
341 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
342 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
343 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
344 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
345 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
346 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
347 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
348 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
349 <td>Source B register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
350 <td>$8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
351 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
352 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
353 </p> |
| 39 | 354 <h4 id="or">or rA, rB, rD</h4> |
| 355 <p> | |
| 356 Bitwise or of rA and rB is stored in rD. | |
| 357 </p> | |
| 358 <p> | |
| 359 <strong>Flags:</strong> C = unmodified, N = result is negative, Z = result is zero | |
| 360 </p> | |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
361 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
362 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
363 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
364 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
365 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
366 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
367 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
368 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
369 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
370 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
371 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
372 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
373 <td>Source B register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
374 <td>$9</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
375 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
376 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
377 </p> |
| 39 | 378 <h4 id="xor">xor rA, rB, rD</h4> |
| 379 <p> | |
| 380 Bitwise exclusive or of rA and rB is stored in rD. | |
| 381 </p> | |
| 382 <p> | |
| 383 <strong>Flags:</strong> C = unmodified, N = result is negative, Z = result is zero | |
| 384 </p> | |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
385 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
386 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
387 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
388 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
389 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
390 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
391 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
392 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
393 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
394 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
395 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
396 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
397 <td>Source B register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
398 <td>$A</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
399 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
400 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
401 </p> |
| 39 | 402 <h4 id="lsl">lsl rA, rB, rD</h4> |
| 403 <p> | |
| 404 The value in rA is shifted left by rB bits and stored in rD | |
| 405 </p> | |
| 406 <p> | |
| 407 <strong>Flags:</strong> C = last bit shifted out of rA, N = result is negative, Z = result is zero | |
| 408 </p> | |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
409 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
410 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
411 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
412 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
413 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
414 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
415 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
416 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
417 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
418 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
419 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
420 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
421 <td>Source B register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
422 <td>$B</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
423 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
424 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
425 </p> |
| 39 | 426 <h4 id="lsr">lsr rA, rB, rD</h4> |
| 427 <p> | |
| 428 The value in rA is shifted right by rB bits and stored in rD | |
| 429 </p> | |
| 430 <p> | |
| 431 <strong>Flags:</strong> C = last bit shifted out of rA, N = result is negative, Z = result is zero | |
| 432 </p> | |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
433 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
434 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
435 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
436 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
437 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
438 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
439 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
440 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
441 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
442 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
443 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
444 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
445 <td>Source B register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
446 <td>$C</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
447 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
448 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
449 </p> |
| 39 | 450 <h4 id="asr">asr rA, rB, rD</h4> |
| 451 <p> | |
| 452 The value in rA is arithmetically shifted right by rB bits and stored in rD. The most significant bit of rA is copied | |
| 453 into the newly shifted bits. This allows asr to be used for signed division by powers of 2 as the sign is preserved. | |
| 454 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
455 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
456 <strong>Flags:</strong> C = last bit shifted out of rA, N = result is negative, Z = result is zero |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
457 </p> |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
458 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
459 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
460 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
461 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
462 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
463 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
464 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
465 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
466 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
467 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
468 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
469 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
470 <td>Source B register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
471 <td>$D</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
472 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
473 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
474 </p> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
475 <h4 id="bcc">bCC LABEL</h4> |
| 39 | 476 <p> |
| 477 bCC performs a relative branch if the condition indicated by CC is true. It has a range of 131 instructions forward or | |
| 478 124 instructions backwards. CC must be one of the following values | |
| 479 <table> | |
| 480 <tr> | |
| 481 <th>CC</th> | |
| 482 <th>Mnemonic</th> | |
| 483 <th>Name</th> | |
| 484 <th>Description</th> | |
| 485 </tr> | |
| 486 <tr> | |
| 487 <td>0</td> | |
| 488 <td>ra</td> | |
| 489 <td>bRanch Always</td> | |
| 490 <td>Unconditionall branch</td> | |
| 491 </tr> | |
| 492 <tr> | |
| 493 <td>1</td> | |
| 494 <td>rf</td> | |
| 495 <td>bRanch False</td> | |
| 496 <td>Effectively a nop</td> | |
| 497 </tr> | |
| 498 <tr> | |
| 499 <td>2</td> | |
| 500 <td>eq</td> | |
| 501 <td>EQual</td> | |
| 502 <td>Branch if zero flag is 1</td> | |
| 503 </tr> | |
| 504 <tr> | |
| 505 <td>3</td> | |
| 506 <td>ne</td> | |
| 507 <td>Not Equal</td> | |
| 508 <td>Branch if zero flag is 0</td> | |
| 509 </tr> | |
| 510 <tr> | |
| 511 <td>4</td> | |
| 512 <td>mi</td> | |
| 513 <td>MInus</td> | |
| 514 <td>Branch if negative flag is 1</td> | |
| 515 </tr> | |
| 516 <tr> | |
| 517 <td>5</td> | |
| 518 <td>pl</td> | |
| 519 <td>PLus</td> | |
| 520 <td>Branch if negative flag is 0</td> | |
| 521 </tr> | |
| 522 <tr> | |
| 523 <td>6</td> | |
| 524 <td>cs</td> | |
| 525 <td>Carry Set</td> | |
| 526 <td>Branch if carry flag is 1. Unsigned "less than" when used with cmp</td> | |
| 527 </tr> | |
| 528 <tr> | |
| 529 <td>7</td> | |
| 530 <td>cc</td> | |
| 531 <td>Carry Clear</td> | |
| 532 <td>Branch if carry flag is 1. Unsigned "greater or equal" when used with cmp</td> | |
| 533 </tr> | |
| 534 <tr> | |
| 535 <td>8</td> | |
| 536 <td>gr</td> | |
| 537 <td>Greater</td> | |
| 538 <td>Branch if carry flag is 0 and the zero flag is zero. Unsigned "greater" when used with cmp</td> | |
| 539 </tr> | |
| 540 <tr> | |
| 541 <td>9</td> | |
| 542 <td>le</td> | |
| 543 <td>Less or Equal</td> | |
| 544 <td>Branch if carry flag is 1 or the zero flag is 1. Unsigned "lesser or equal" when used with cmp</td> | |
| 545 </tr> | |
| 546 </table> | |
| 547 Use of CC values greater than 9 will result in an invalid instruction exception. | |
| 548 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
549 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
550 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
551 </p> |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
552 |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
553 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
554 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
555 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
556 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
557 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
558 <th>11-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
559 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
560 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
561 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
562 <td>CC</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
563 <td>Signed 8-bit offset. Offset is multiplied by two before being added to PC</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
564 <td>$E</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
565 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
566 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
567 </p> |
| 39 | 568 <h4 id="mov">mov rA, rD</h4> |
| 569 <p> | |
| 570 Stores the value of rA in rD. This can be used as a return or jump instruction if rD is PC. | |
| 571 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
572 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
573 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
574 </p> |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
575 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
576 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
577 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
578 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
579 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
580 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
581 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
582 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
583 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
584 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
585 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
586 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
587 <td>$0</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
588 <td>$F</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
589 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
590 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
591 </p> |
| 39 | 592 <h4 id="neg">neg rA, rD</h4> |
| 593 <p> | |
| 594 Calculates the 2s complement of rA and stores it in rD. This can be used in combination with add to implement subtraction. | |
| 595 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
596 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
597 <strong>Flags:</strong> C = carry out of bit 15, N = result is negative, Z = result is zero |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
598 </p> |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
599 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
600 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
601 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
602 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
603 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
604 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
605 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
606 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
607 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
608 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
609 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
610 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
611 <td>$1</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
612 <td>$F</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
613 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
614 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
615 </p> |
| 39 | 616 <h4 id="not">not rA, rD</h4> |
| 617 <p> | |
| 618 Calculates the 1s complement of rA and stores it in rD. | |
| 619 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
620 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
621 <strong>Flags:</strong> C = unmodified, N = result is negative, Z = result is zero |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
622 </p> |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
623 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
624 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
625 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
626 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
627 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
628 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
629 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
630 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
631 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
632 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
633 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
634 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
635 <td>$2</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
636 <td>$F</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
637 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
638 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
639 </p> |
| 39 | 640 <h4 id="cmp">cmp rA, rD</h4> |
| 641 <p> | |
| 642 Subtracts rA from rD and discards the result, but still updates flags. | |
| 643 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
644 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
645 <strong>Flags:</strong> C = carry out of bit 15, N = result is negative, Z = result is zero |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
646 </p> |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
647 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
648 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
649 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
650 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
651 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
652 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
653 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
654 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
655 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
656 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
657 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
658 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
659 <td>$3</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
660 <td>$F</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
661 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
662 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
663 </p> |
| 39 | 664 <h4 id="call">call rA, rD</h4> |
| 665 <p> | |
| 666 Stores the address of the next instruction in rD and sets PC to the value in rA. Used for calling subroutines. | |
| 667 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
668 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
669 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
670 </p> |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
671 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
672 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
673 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
674 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
675 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
676 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
677 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
678 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
679 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
680 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
681 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
682 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
683 <td>$4</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
684 <td>$F</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
685 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
686 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
687 </p> |
| 39 | 688 <h4 id="swap">swap rA, rD</h4> |
| 689 <p> | |
| 690 Swaps the values in rA and rD. | |
| 691 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
692 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
693 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
694 </p> |
|
42
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
695 <p> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
696 <strong>Encoding:</strong> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
697 <table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
698 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
699 <th>15-12</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
700 <th>11-8</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
701 <th>7-4</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
702 <th>3-0</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
703 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
704 <tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
705 <td>Destination register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
706 <td>Source A register</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
707 <td>$5</td> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
708 <td>$F</th> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
709 </tr> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
710 </table> |
|
a64e11e48a41
Added encoding for a bunch of instructions
Michael Pavone <pavone@retrodev.com>
parents:
40
diff
changeset
|
711 </p> |
|
45
5338b9affd09
Updated HTML documentation to reflect CPU changes
Michael Pavone <pavone@retrodev.com>
parents:
42
diff
changeset
|
712 <h4 id="longjmp">longjmp rA, rD</h4> |
| 39 | 713 <p> |
|
45
5338b9affd09
Updated HTML documentation to reflect CPU changes
Michael Pavone <pavone@retrodev.com>
parents:
42
diff
changeset
|
714 Sets PC to rA and PCH to the low 7-bits of rD |
| 39 | 715 </p> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
716 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
717 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
718 </p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
719 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
720 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
721 </p> |
| 39 | 722 <h4 id="ini">ini IM, rD</h4> |
| 723 <p> | |
| 724 Reads a word from the IO port indicated by IM and stores it in rD. IM can range from 0 to 15. | |
| 725 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
726 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
727 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
728 </p> |
| 39 | 729 <h4 id="outi">outi</h4> |
| 730 <p> | |
| 731 Writes the word stored in rD to the IO port indicated by IM. IM can range from 0 to 15. | |
| 732 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
733 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
734 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
735 </p> |
| 39 | 736 <h4 id="addi">addi IM, rD</h4> |
| 737 <p> | |
| 738 Adds IM to the value in rD and stores the result in rD. IM range from -8 to -1 or 1 to 8. A value of 0 is used to indicate 8. | |
| 739 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
740 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
741 <strong>Flags:</strong> C = carry out of bit 15, N = result is negative, Z = result is zero |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
742 </p> |
| 39 | 743 <h4 id="andi">andi IM, rD</h4> |
| 744 <p> | |
|
45
5338b9affd09
Updated HTML documentation to reflect CPU changes
Michael Pavone <pavone@retrodev.com>
parents:
42
diff
changeset
|
745 Performs a bitwise and of IM and the value in rD and stores the result in rD. IM can range from -8 to -1 or 1 to 8. A value of 0 is used to indicate 8. |
| 39 | 746 </p> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
747 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
748 <strong>Flags:</strong> C = unmodified, N = result is negative, Z = result is zero |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
749 </p> |
| 39 | 750 <h4 id="ori">ori IM, rD</h4> |
| 751 <p> | |
|
45
5338b9affd09
Updated HTML documentation to reflect CPU changes
Michael Pavone <pavone@retrodev.com>
parents:
42
diff
changeset
|
752 Performs a bitwise or of IM and the value in rD and stores the result in rD. IM can range from -8 to -1 or 1 to 8. A value of 0 is used to indicate 8. |
|
5338b9affd09
Updated HTML documentation to reflect CPU changes
Michael Pavone <pavone@retrodev.com>
parents:
42
diff
changeset
|
753 </p> |
|
5338b9affd09
Updated HTML documentation to reflect CPU changes
Michael Pavone <pavone@retrodev.com>
parents:
42
diff
changeset
|
754 <h4 id="ori">xori IM, rD</h4> |
|
5338b9affd09
Updated HTML documentation to reflect CPU changes
Michael Pavone <pavone@retrodev.com>
parents:
42
diff
changeset
|
755 <p> |
|
5338b9affd09
Updated HTML documentation to reflect CPU changes
Michael Pavone <pavone@retrodev.com>
parents:
42
diff
changeset
|
756 Performs a bitwise exclusive or of IM and the value in rD and stores the result in rD. IM can range from -8 to -1 or 1 to 8. A value of 0 is used to indicate 8. |
| 39 | 757 </p> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
758 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
759 <strong>Flags:</strong> C = unmodified, N = result is negative, Z = result is zero |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
760 </p> |
| 39 | 761 <h4 id="lsli">lsli IM, rD</h4> |
| 762 <p> | |
| 763 Shifts the value in rD IM bits to the left. IM can range from 1 to 8. | |
| 764 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
765 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
766 <strong>Flags:</strong> C = last bit shifted out of rA, N = result is negative, Z = result is zero |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
767 </p> |
| 39 | 768 <h4 id="lsri">lsri IM, rD</h4> |
| 769 <p> | |
| 770 Shifts the value in rD IM bits to the right. IM can range from 1 to 8. | |
| 771 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
772 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
773 <strong>Flags:</strong> C = last bit shifted out of rA, N = result is negative, Z = result is zero |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
774 </p> |
| 39 | 775 <h4 id="cmpi">cmpi IM, rd</h4> |
| 776 <p> | |
| 777 Subtracts IM from rD and discards the result, but updates flags. IM can range from -8 to 7. | |
| 778 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
779 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
780 <strong>Flags:</strong> C = carry out of bit 15, N = result is negative, Z = result is zero |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
781 </p> |
| 39 | 782 <h4 id="reti">reti rD</h4> |
| 783 <p> | |
| 784 Sets rD to the value storeed in EUR, SR to the value stored in ESR and PC to the value stored in EPC. This instruction is used for returning from an | |
| 785 exception or interrupt. | |
| 786 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
787 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
788 <strong>Flags:</strong> Updated corresponding to the value in ESR. |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
789 </p> |
| 39 | 790 <h4 id="trap">trap rD</h4> |
| 791 <p> | |
| 792 Causes an exception to be taken to the vector indicated by rD. | |
| 793 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
794 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
795 <strong>Flags:</strong> Condition code flags unchanged, interrupt enable bits cleared. |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
796 </p> |
| 39 | 797 <h4 id="trapi">trapi IM</h4> |
| 798 <p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
799 Causes an exception to be taken to the vector indicated by IM |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
800 </p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
801 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
802 <strong>Flags:</strong> Condition code flags unchanged, interrupt enable bits cleared. |
| 39 | 803 </p> |
| 804 <h4 id="getepc">getepc rD</h4> | |
| 805 <p> | |
| 806 Stores the value of EPC in rD. | |
| 807 </p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
808 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
809 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
810 </p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
811 <h4 id="setepc">setepc rD</h4> |
| 39 | 812 <p> |
| 813 Stores the vaule of rD in EPC. | |
| 814 </p> | |
| 815 <p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
816 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
817 </p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
818 <h4 id="getesr">getesr rD</h4> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
819 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
820 Stores the value of ESR in rD. |
| 39 | 821 </p> |
| 822 <p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
823 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
824 </p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
825 <h4 id="setesr">setesr rD</h4> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
826 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
827 Stores the value of rD in ESR. |
| 39 | 828 </p> |
| 829 <p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
830 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
831 </p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
832 <h4 id="geteur">geteur rD</h4> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
833 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
834 Stores the value of EUR in rD. |
| 39 | 835 </p> |
| 836 <p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
837 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
838 </p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
839 <h4 id="seteur">seteur rD</h4> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
840 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
841 Stores the value of rd in EUR. |
| 39 | 842 </p> |
| 843 <p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
844 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
845 </p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
846 <h4 id="getenum">getenum rD</h4> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
847 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
848 Stores the value of ENUM in rD. |
| 39 | 849 </p> |
| 850 <p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
851 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
852 </p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
853 <h4 id="setenum">setenum rD</h4> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
854 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
855 Stores the value of rd in ENUM. |
| 39 | 856 </p> |
| 857 <p> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
858 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
859 </p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
860 <h4 id="getvbr">getvbr rD</h4> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
861 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
862 Stores the value of VBR in rD. |
| 39 | 863 </p> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
864 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
865 <strong>Flags:</strong> No change |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
866 </p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
867 <h4 id="setvbr">setvbr rD</h4> |
| 39 | 868 <p> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
869 Stores the valueof rD in VBR. |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
870 </p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
871 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
872 <strong>Flags:</strong> No change |
| 39 | 873 </p> |
| 874 <h2 id="video">Video</h2> | |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
875 <h3 id="vidover">Overview</h3> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
876 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
877 Simple 16 features a tile-based video processor using 8x8 pixel tiles. It supports a single background plane with a fixed width of 64 tiles and configurable height. |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
878 64 sprites can be displayed simultaneously and 20 can be displayed on each line. Each sprite can either be 8x8 or 16x16 pixels and can use either of the first two |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
879 16 color palettes. The background plane can make use of all 4 palettes. |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
880 </p> |
| 39 | 881 <h2 id="audio">Audio</h2> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
882 <h3 id="audover">Overview</h3> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
883 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
884 Simple 16 has four square-wave tone generators with a 16-bit period and an 8-bit volume. The special value of 0 for the period causes the volume to be output constantly |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
885 allowing the volume register to be used as a simple 8-bit DAC. |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
886 </p> |
| 39 | 887 <h2 id="timer">Timer</h2> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
888 <h3 id="timeover">Overview</h3> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
889 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
890 Simple 16 has a single timer with a 16-bit period. Interrupt 0 is triggered on timer expiration. |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
891 </p> |
| 39 | 892 <h2 id="controllers">Controllers</h2> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
893 <h3 id="contover">Overview</h3> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
894 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
895 Simple 16 supports 2 controllers, each with a D-pad and 8 buttons configured in either an SNES (4 action buttons on the face + 2 shoulder buttons + Start and Select) |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
896 or Genesis 6-button controller (6 action buttons on the face + Start and Mode) arrangement. In this document, the buttons are given using the Genesis naming scheme. |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
897 For a controller following the SNES layout, the right trigger is 'C', the left trigger is 'Z' and 'Select' is 'Mode'. |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
898 </p> |
| 39 | 899 <h2 id="serial">Serial Port</h2> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
900 <h3>Overview</h3> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
901 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
902 This port can be thought of a simple UART for debugging purposes. In an emulator, a write should result in a byte being written to stdout and a read should return |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
903 a byte read from stdin. This peripheral can be omitted in which case writes should be ignored and reads should return $FFFF. The primary purpose of this port is |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
904 to enable easy debugging of the CPU core before other, more complicated, peripherals are working. |
| 39 | 905 <h2 id="cart">Cartridge</h2> |
|
40
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
906 <h3>Overview</h3> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
907 <p> |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
908 Simple 16 allows for 48KB of flat mapped cartridge ROM. Future revisions may allow banking. |
|
413e7b9c0db1
Added flag change documentation for all instructions. Added hyperlinks to individual instructions. Added overviews for all the peripherals
Michael Pavone <pavone@retrodev.com>
parents:
39
diff
changeset
|
909 </p> |
| 39 | 910 </body> |
| 911 </html> |