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annotate x86_backend.h @ 345:29d2ca563499

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Don't sync the 68K clock to the VDP clock unless the 68K had to wait for the VDP. This unfortunately breaks the direct color DMA demos, but should be more correct overall.
author Mike Pavone <pavone@retrodev.com>
date Sun, 19 May 2013 13:47:47 -0700
parents 467bfa17004a
children 2f264d2a60c2
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1 #ifndef X86_BACKEND_H_
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2 #define X86_BACKEND_H_
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4 #include <stdint.h>
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5
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6 #define INVALID_OFFSET 0xFFFFFFFF
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7 #define EXTENSION_WORD 0xFFFFFFFE
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9 typedef struct {
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10 int32_t disp;
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11 uint8_t mode;
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12 uint8_t base;
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13 uint8_t index;
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14 uint8_t cycles;
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15 } x86_ea;
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17 typedef struct {
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18 uint8_t *base;
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19 int32_t *offsets;
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20 } native_map_slot;
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21
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22 typedef struct deferred_addr {
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23 struct deferred_addr *next;
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24 uint8_t *dest;
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25 uint32_t address;
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26 } deferred_addr;
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29 #define MMAP_READ 0x1
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30 #define MMAP_WRITE 0x2
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31 #define MMAP_CODE 0x4
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32 #define MMAP_PTR_IDX 0x8
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34 typedef uint16_t (*read_16_fun)(uint32_t address, void * context);
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35 typedef uint8_t (*read_8_fun)(uint32_t address, void * context);
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36 typedef void * (*write_16_fun)(uint32_t address, void * context, uint16_t value);
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37 typedef void * (*write_8_fun)(uint32_t address, void * context, uint8_t value);
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39 typedef struct {
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40 uint32_t start;
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41 uint32_t end;
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42 uint32_t mask;
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43 uint16_t ptr_index;
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44 uint16_t flags;
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45 void * buffer;
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46 read_16_fun read_16;
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47 write_16_fun write_16;
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48 read_8_fun read_8;
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49 write_8_fun write_8;
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50 } memmap_chunk;
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52 typedef uint8_t * (*native_addr_func)(void * context, uint32_t address);
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54 deferred_addr * defer_address(deferred_addr * old_head, uint32_t address, uint8_t *dest);
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55 void remove_deferred_until(deferred_addr **head_ptr, deferred_addr * remove_to);
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56 void process_deferred(deferred_addr ** head_ptr, void * context, native_addr_func get_native);
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58 #endif //X86_BACKEND_H_
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