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annotate trans.c @ 1987:71732f2f6f42

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Fix handling of unmapped reads/writes to the cart/expansion port region
author Mike Pavone <pavone@retrodev.com>
date Mon, 01 Jun 2020 23:59:59 -0700
parents 0c1491818f4b
children 374a5ae694e8 57ae42c3ab45
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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 #include "68kinst.h"
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7 #ifdef NEW_CORE
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8 #include "m68k.h"
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9 #else
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10 #include "m68k_core.h"
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11 #endif
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12 #include "mem.h"
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13 #include <stdio.h>
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14 #include <stdlib.h>
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15 #include <string.h>
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16
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17 int headless = 1;
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18 void render_errorbox(char * title, char * buf)
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19 {
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20 }
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21
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22 void render_infobox(char * title, char * buf)
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23 {
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24 }
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25
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26 #ifndef NEW_CORE
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27 m68k_context * sync_components(m68k_context * context, uint32_t address)
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28 {
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29 if (context->current_cycle > 0x80000000) {
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30 context->current_cycle -= 0x80000000;
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31 }
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32 if (context->status & M68K_STATUS_TRACE || context->trace_pending) {
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33 context->target_cycle = context->current_cycle;
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34 }
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35 return context;
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36 }
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37 #endif
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38
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39 m68k_context *reset_handler(m68k_context *context)
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40 {
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41 m68k_print_regs(context);
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42 exit(0);
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43 //unreachable
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44 return context;
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45 }
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46
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47 int main(int argc, char ** argv)
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48 {
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49 long filesize;
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50 unsigned short *filebuf;
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51 char disbuf[1024];
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52 unsigned short * cur;
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53 m68k_options opts;
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54 FILE * f = fopen(argv[1], "rb");
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55 fseek(f, 0, SEEK_END);
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56 filesize = ftell(f);
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57 fseek(f, 0, SEEK_SET);
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58 filebuf = malloc(0x400000);
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59 memset(filebuf, 0, 0x400000);
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60 fread(filebuf, 2, filesize/2 > 0x200000 ? 0x200000 : filesize/2, f);
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61 fclose(f);
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62 for(cur = filebuf; cur - filebuf < (filesize/2); ++cur)
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63 {
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64 *cur = (*cur >> 8) | (*cur << 8);
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65 }
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66 memmap_chunk memmap[2];
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67 memset(memmap, 0, sizeof(memmap_chunk)*2);
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68 memmap[0].end = 0x400000;
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69 memmap[0].mask = 0xFFFFFF;
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70 memmap[0].flags = MMAP_READ;
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71 memmap[0].buffer = filebuf;
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72
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73 memmap[1].start = 0xE00000;
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74 memmap[1].end = 0x1000000;
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75 memmap[1].mask = 0xFFFF;
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76 memmap[1].flags = MMAP_READ | MMAP_WRITE | MMAP_CODE;
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77 memmap[1].buffer = malloc(64 * 1024);
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78 memset(memmap[1].buffer, 0, 64 * 1024);
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79 init_m68k_opts(&opts, memmap, 2, 1);
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80 m68k_context * context = init_68k_context(&opts, reset_handler);
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81 context->mem_pointers[0] = memmap[0].buffer;
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82 context->mem_pointers[1] = memmap[1].buffer;
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83 #ifndef NEW_CORE
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84 context->target_cycle = context->sync_cycle = 0x80000000;
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85 #endif
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86 m68k_reset(context);
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87 #ifdef NEW_CORE
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88 for (;;)
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89 {
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90 m68k_execute(context, 0x80000000);
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91 context->cycles = 0;
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92 }
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93 #endif
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94 return 0;
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95 }
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96