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annotate m68k_core.h @ 985:751280fb4494

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Fix interrupt latency from STOP instruction status reg changes. Fix modified code patching when non-standard aliases are used. This fixes the demo MDEM's First
author Michael Pavone <pavone@retrodev.com>
date Sun, 24 Apr 2016 21:23:28 -0700
parents 902c53d9c16f
children 1f09994e92c5
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140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING
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1 /*
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2 Copyright 2013 Michael Pavone
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3 This file is part of BlastEm.
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
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5 */
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6 #ifndef M68K_CORE_H_
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7 #define M68K_CORE_H_
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8 #include <stdint.h>
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9 #include <stdio.h>
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10 #include "backend.h"
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11 //#include "68kinst.h"
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12 struct m68kinst;
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13
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cbf97d335444 Full support for Sega mapper when it comes to data. Code in remapped sections may not work reliably. SSF2 now works.
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14 #define NUM_MEM_AREAS 8
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15 #define NATIVE_MAP_CHUNKS (64*1024)
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16 #define NATIVE_CHUNK_SIZE ((16 * 1024 * 1024 / NATIVE_MAP_CHUNKS)/2)
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17 #define MAX_NATIVE_SIZE 255
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18
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19 #define M68K_OPT_BROKEN_READ_MODIFY 1
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20
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21 typedef void (*start_fun)(uint8_t * addr, void * context);
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22
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23 typedef struct {
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24 cpu_options gen;
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25
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26 int8_t dregs[8];
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27 int8_t aregs[8];
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28 int8_t flag_regs[5];
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29 FILE *address_log;
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30 code_ptr read_16;
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31 code_ptr write_16;
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32 code_ptr read_8;
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33 code_ptr write_8;
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34 code_ptr read_32;
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35 code_ptr write_32_lowfirst;
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36 code_ptr write_32_highfirst;
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37 code_ptr do_sync;
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38 code_ptr trap;
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7367b14ac01c Don't attempt to translate or map code at odd addresses. This fixes a bug that shows up when playing College Footbal USA 96
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39 code_ptr odd_address;
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40 start_fun start_context;
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41 code_ptr retrans_stub;
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42 code_ptr native_addr;
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43 code_ptr native_addr_and_sync;
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44 code_ptr get_sr;
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45 code_ptr set_sr;
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46 code_ptr set_ccr;
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47 } m68k_options;
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48
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49 typedef struct {
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50 uint8_t flags[5];
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51 uint8_t status;
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52 uint16_t int_ack;
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53 uint32_t dregs[8];
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8da611e69b32 Implement a couple of supervisor instructions
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54 uint32_t aregs[9];
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55 uint32_t target_cycle; //cycle at which the next synchronization or interrupt occurs
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56 uint32_t current_cycle;
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57 uint32_t sync_cycle;
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58 uint32_t int_cycle;
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59 uint32_t int_num;
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60 uint32_t last_prefetch_address;
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61 uint16_t *mem_pointers[NUM_MEM_AREAS];
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62 code_ptr resume_pc;
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63 native_map_slot *native_code_map;
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a18e3923481e Remove some of the hard coded assumptions about the memory map from the CPU cores
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64 m68k_options *options;
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a8ee7934a1f8 Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
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65 void *system;
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98d7b6073163 Implement interrupt latency. Fixes Sesame Street: Counting Cafe and gives accurate results in my test ROM
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66 uint8_t int_pending;
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7022ba865cfd Initial work for allowing loading a ROM from menu
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67 uint8_t should_return;
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fc04781f4d28 Removed hardcoded assumptions in M68K core about which parts of the memory map are RAM
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68 uint8_t ram_code_flags[];
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69 } m68k_context;
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70
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71 void translate_m68k(m68k_options * opts, struct m68kinst * inst);
567
8e395210f50f Refactor gen_x86 to use an interface more like gen_arm and to remove the need for the caller to decide whether an 8-bit or 32-bit displacement is needed in the rdisp functions. Update m68k_to_x86 to use the new version of the gen_x86 functions and do some minor refactoring there in the process
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72 void translate_m68k_stream(uint32_t address, m68k_context * context);
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73 void start_68k_context(m68k_context * context, uint32_t address);
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74 void resume_68k(m68k_context *context);
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30ccf56842d6 All cycle counters are now based off the master clock. This seems to have messed up Z80 interrupt timing (music in Sonic 2 is too slow for instance), but things are generally working
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75 void init_m68k_opts(m68k_options * opts, memmap_chunk * memmap, uint32_t num_chunks, uint32_t clock_divider);
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fc04781f4d28 Removed hardcoded assumptions in M68K core about which parts of the memory map are RAM
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76 m68k_context * init_68k_context(m68k_options * opts);
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3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
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77 void m68k_reset(m68k_context * context);
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252dfd29831d Selecting a second game from the menu now works
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78 void m68k_options_free(m68k_options *opts);
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ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
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79 void insert_breakpoint(m68k_context * context, uint32_t address, uint8_t * bp_handler);
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80 void remove_breakpoint(m68k_context * context, uint32_t address);
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81 m68k_context * m68k_handle_code_write(uint32_t address, m68k_context * context);
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82 uint32_t get_instruction_start(m68k_options *opts, native_map_slot * native_code_map, uint32_t address);
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83
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84 #endif //M68K_CORE_H_
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85