Mercurial > repos > blastem
annotate fake_cpm.sz8 @ 1585:15116d4fdf40
Fix cycle counts for BCD instructions, RESET, and MOVE from SR
author | Michael Pavone <pavone@retrodev.com> |
---|---|
date | Fri, 18 May 2018 19:00:10 -0700 |
parents | cf6149b7c6e5 |
children |
rev | line source |
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820
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1 CONSOLE_PORT equ 0 |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
2 STATUS_PORT equ 1 |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
3 EXIT_PORT equ 2 |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
4 org $E400 |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
5 jp handle_call |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
6 ld a, (should_exit) |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
7 dec a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
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8 jr z, do_exit |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
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9 ld a, 1 |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
10 ld (should_exit), a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
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11 jp $100 |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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12 do_exit: |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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13 no_impl |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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14 out (EXIT_PORT), a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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15 should_exit: |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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16 dc.b 0 |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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17 |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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18 console_in: |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
19 in a, (CONSOLE_PORT) |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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20 ld l, a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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21 ret |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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22 console_out: |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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23 ld a, e |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
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24 out (CONSOLE_PORT), a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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25 ret |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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26 get_iobyte: |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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27 ld a, (3) |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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28 ld l, a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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29 ret |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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30 set_iobyte: |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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31 ld a, e |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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32 ld (3), a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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33 ret |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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34 write_string: |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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35 ld c, '$' |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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36 jp .start |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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37 .continue |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
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38 out (CONSOLE_PORT), a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
39 inc de |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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40 .start |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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41 ld a, (de) |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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42 cp c |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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43 jr nz, .continue |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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44 ;flush output |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
45 out (STATUS_PORT),a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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46 ret |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
47 read_string: |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
48 ld a, (de) |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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49 ld c, a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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50 ld b, $A ;newline |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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51 inc c |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
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52 inc de |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
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53 push de |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
54 inc de |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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55 jp .start |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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56 .continue |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
57 in a, (CONSOLE_PORT) |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
|
58 cp b |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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59 jr z, .end |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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changeset
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60 ld (de), a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
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61 inc de |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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62 .start |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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63 dec c |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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64 jr nz, .continue |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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65 ;todo: consume excess characters |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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66 .end |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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67 pop hl |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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68 ex de, hl |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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69 sbc hl, de |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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70 ld a, l |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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71 ld (de), a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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72 ret |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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73 |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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74 console_status: |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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75 in a, (STATUS_PORT) |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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76 ld l, a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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77 ret |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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78 |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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79 handle_call: |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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80 ld a, c |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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81 or a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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82 jr z, do_exit |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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83 dec a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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84 jr z, console_in |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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85 dec a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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86 jr z, console_out |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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87 dec a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
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88 jr z, no_impl ;aux reader input |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
89 dec a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
90 jr z, no_impl ;aux punch output |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
91 dec a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
92 jr z, no_impl ;printer output |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
93 dec a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
94 jr z, no_impl ;direct console IO |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
95 dec a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
96 jr z, get_iobyte |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
97 dec a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
98 jr z, set_iobyte |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
99 dec a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
100 jr z, write_string |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
101 dec a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
102 jr z, read_string |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
103 dec a |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
104 jr z, console_status |
cf6149b7c6e5
Implement a tiny bit of CPM BDOS and add a corresponding Z80 core driver so that simple CPM programs like ZEXDOC/ZEXALL can be run against my Z80 core
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
105 jp no_impl |