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annotate blastem.c @ 211:464513050c85

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Small bit of cleanup
author Mike Pavone <pavone@retrodev.com>
date Tue, 16 Apr 2013 09:31:21 -0700
parents 209a37eed3e7
children 2b1c2c28b261
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1 #include "68kinst.h"
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2 #include "m68k_to_x86.h"
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3 #include "mem.h"
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4 #include "vdp.h"
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5 #include "render.h"
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6 #include "blastem.h"
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10
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11 #define CARTRIDGE_WORDS 0x200000
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12 #define RAM_WORDS 32 * 1024
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13 #define Z80_RAM_BYTES 8 * 1024
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14 #define MCLKS_PER_68K 7
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15 //TODO: Figure out the exact value for this
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16 #define MCLKS_PER_FRAME (MCLKS_LINE*262)
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17 #define CYCLE_NEVER 0xFFFFFFFF
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18
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19 uint16_t cart[CARTRIDGE_WORDS];
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20 uint16_t ram[RAM_WORDS];
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21 uint8_t z80_ram[Z80_RAM_BYTES];
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22
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23 io_port gamepad_1;
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24 io_port gamepad_2;
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25
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26 #ifndef MIN
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27 #define MIN(a,b) ((a) < (b) ? (a) : (b))
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28 #endif
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29
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30 #define SMD_HEADER_SIZE 512
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31 #define SMD_MAGIC1 0x03
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32 #define SMD_MAGIC2 0xAA
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33 #define SMD_MAGIC3 0xBB
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34 #define SMD_BLOCK_SIZE 0x4000
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35
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36 int load_smd_rom(long filesize, FILE * f)
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37 {
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38 uint8_t block[SMD_BLOCK_SIZE];
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39 filesize -= SMD_HEADER_SIZE;
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40 fseek(f, SMD_HEADER_SIZE, SEEK_SET);
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41
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42 uint16_t * dst = cart;
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43 while (filesize > 0) {
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44 fread(block, 1, SMD_BLOCK_SIZE, f);
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45 for (uint8_t *low = block, *high = (block+SMD_BLOCK_SIZE/2), *end = block+SMD_BLOCK_SIZE; high < end; high++, low++) {
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46 *(dst++) = *high << 8 | *low;
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47 }
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48 filesize -= SMD_BLOCK_SIZE;
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49 }
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50 return 1;
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51 }
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52
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53 int load_rom(char * filename)
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54 {
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55 uint8_t header[10];
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56 FILE * f = fopen(filename, "rb");
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57 if (!f) {
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58 return 0;
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59 }
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60 fread(header, 1, sizeof(header), f);
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61 fseek(f, 0, SEEK_END);
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62 long filesize = ftell(f);
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63 if (filesize/2 > CARTRIDGE_WORDS) {
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64 //carts bigger than 4MB not currently supported
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65 filesize = CARTRIDGE_WORDS*2;
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66 }
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67 fseek(f, 0, SEEK_SET);
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68 if (header[1] == SMD_MAGIC1 && header[8] == SMD_MAGIC2 && header[9] == SMD_MAGIC3) {
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69 int i;
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70 for (i = 3; i < 8; i++) {
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71 if (header[i] != 0) {
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72 break;
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73 }
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74 }
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75 if (i == 8) {
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76 if (header[2]) {
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77 fprintf(stderr, "%s is a split SMD ROM which is not currently supported", filename);
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78 exit(1);
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79 }
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80 return load_smd_rom(filesize, f);
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81 }
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82 }
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83 fread(cart, 2, filesize/2, f);
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84 fclose(f);
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85 for(unsigned short * cur = cart; cur - cart < (filesize/2); ++cur)
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86 {
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87 *cur = (*cur >> 8) | (*cur << 8);
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88 }
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89 //TODO: Mirror ROM
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90 return 1;
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91 }
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92
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93 uint16_t read_dma_value(uint32_t address)
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94 {
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95 //addresses here are word addresses (i.e. bit 0 corresponds to A1), so no need to do div by 2
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96 if (address < 0x200000) {
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97 return cart[address];
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98 } else if(address >= 0x700000) {
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99 return ram[address & 0x7FFF];
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100 }
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101 //TODO: Figure out what happens when you try to DMA from weird adresses like IO or banked Z80 area
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102 return 0;
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103 }
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105 #define VINT_CYCLE ((MCLKS_LINE * 226)/MCLKS_PER_68K)
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106
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107 void adjust_int_cycle(m68k_context * context, vdp_context * v_context)
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108 {
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109 if (!(v_context->regs[REG_MODE_2] & 0x20 && ((context->status & 0x7) < 6)) || context->current_cycle >= VINT_CYCLE) {
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110 context->int_cycle = CYCLE_NEVER;
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111 context->target_cycle = context->sync_cycle;
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112 } else if (context->int_cycle > VINT_CYCLE) {
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113 context->int_cycle = VINT_CYCLE;
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114 context->int_num = 6;
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115 if (context->int_cycle < context->sync_cycle) {
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116 context->target_cycle = context->int_cycle;
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117 }
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118 }
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119 }
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120
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121 int break_on_sync = 0;
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122
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123 m68k_context * sync_components(m68k_context * context, uint32_t address)
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124 {
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125 //TODO: Handle sync targets smaller than a single frame
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126 vdp_context * v_context = context->next_context;
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127 uint32_t mclks = context->current_cycle * MCLKS_PER_68K;
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128 if (mclks >= MCLKS_PER_FRAME) {
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129 //printf("reached frame end | 68K Cycles: %d, MCLK Cycles: %d\n", context->current_cycle, mclks);
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130 vdp_run_context(v_context, MCLKS_PER_FRAME);
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131 break_on_sync |= wait_render_frame(v_context);
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132 mclks -= MCLKS_PER_FRAME;
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133 vdp_adjust_cycles(v_context, MCLKS_PER_FRAME);
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134 io_adjust_cycles(&gamepad_1, context->current_cycle, MCLKS_PER_FRAME/MCLKS_PER_68K);
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135 io_adjust_cycles(&gamepad_2, context->current_cycle, MCLKS_PER_FRAME/MCLKS_PER_68K);
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136 context->current_cycle -= MCLKS_PER_FRAME/MCLKS_PER_68K;
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137 if (mclks) {
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138 vdp_run_context(v_context, mclks);
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parents:
diff changeset
139 }
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diff changeset
140 } else {
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diff changeset
141 //printf("running VDP for %d cycles\n", mclks - v_context->cycles);
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diff changeset
142 vdp_run_context(v_context, mclks);
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diff changeset
143 }
186
02e25abe2dcd Cleanup VINT code and fix bug in which VINT cycle would be set incorrectly after a VDP control port write
Mike Pavone <pavone@retrodev.com>
parents: 185
diff changeset
144 adjust_int_cycle(context, v_context);
198
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parents: 197
diff changeset
145 if (break_on_sync && address) {
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parents: 197
diff changeset
146 break_on_sync = 0;
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parents: 197
diff changeset
147 debugger(context, address);
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parents: 197
diff changeset
148 }
88
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diff changeset
149 return context;
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parents:
diff changeset
150 }
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parents:
diff changeset
151
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152 m68k_context * vdp_port_write(uint32_t vdp_port, m68k_context * context, uint16_t value)
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153 {
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diff changeset
154 //printf("vdp_port write: %X, value: %X, cycle: %d\n", vdp_port, value, context->current_cycle);
198
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parents: 197
diff changeset
155 sync_components(context, 0);
88
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diff changeset
156 vdp_context * v_context = context->next_context;
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parents:
diff changeset
157 if (vdp_port < 0x10) {
149
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress
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parents: 144
diff changeset
158 int blocked;
88
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diff changeset
159 if (vdp_port < 4) {
149
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parents: 144
diff changeset
160 while (vdp_data_port_write(v_context, value) < 0) {
88
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diff changeset
161 while(v_context->flags & FLAG_DMA_RUN) {
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diff changeset
162 vdp_run_dma_done(v_context, MCLKS_PER_FRAME);
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parents:
diff changeset
163 if (v_context->cycles >= MCLKS_PER_FRAME) {
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parents:
diff changeset
164 wait_render_frame(v_context);
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165 vdp_adjust_cycles(v_context, MCLKS_PER_FRAME);
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parents:
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166 io_adjust_cycles(&gamepad_1, v_context->cycles/MCLKS_PER_68K, MCLKS_PER_FRAME/MCLKS_PER_68K);
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167 io_adjust_cycles(&gamepad_2, v_context->cycles/MCLKS_PER_68K, MCLKS_PER_FRAME/MCLKS_PER_68K);
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168 }
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169 }
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170 context->current_cycle = v_context->cycles / MCLKS_PER_68K;
149
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parents: 144
diff changeset
171 }
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
172 } else if(vdp_port < 8) {
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parents: 144
diff changeset
173 blocked = vdp_control_port_write(v_context, value);
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parents: 144
diff changeset
174 if (blocked) {
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
175 while (blocked) {
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
176 while(v_context->flags & FLAG_DMA_RUN) {
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress
Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
177 vdp_run_dma_done(v_context, MCLKS_PER_FRAME);
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parents: 144
diff changeset
178 if (v_context->cycles >= MCLKS_PER_FRAME) {
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parents: 144
diff changeset
179 wait_render_frame(v_context);
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parents: 144
diff changeset
180 vdp_adjust_cycles(v_context, MCLKS_PER_FRAME);
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parents: 144
diff changeset
181 io_adjust_cycles(&gamepad_1, v_context->cycles/MCLKS_PER_68K, MCLKS_PER_FRAME/MCLKS_PER_68K);
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parents: 144
diff changeset
182 io_adjust_cycles(&gamepad_2, v_context->cycles/MCLKS_PER_68K, MCLKS_PER_FRAME/MCLKS_PER_68K);
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parents: 144
diff changeset
183 }
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
184 }
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress
Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
185 if (blocked < 0) {
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parents: 144
diff changeset
186 blocked = vdp_control_port_write(v_context, value);
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
187 } else {
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parents: 144
diff changeset
188 blocked = 0;
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parents: 144
diff changeset
189 }
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
190 }
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress
Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
191 context->current_cycle = v_context->cycles / MCLKS_PER_68K;
88
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parents:
diff changeset
192 } else {
186
02e25abe2dcd Cleanup VINT code and fix bug in which VINT cycle would be set incorrectly after a VDP control port write
Mike Pavone <pavone@retrodev.com>
parents: 185
diff changeset
193 adjust_int_cycle(context, v_context);
88
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parents:
diff changeset
194 }
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diff changeset
195 } else {
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diff changeset
196 printf("Illegal write to HV Counter port %X\n", vdp_port);
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197 exit(1);
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diff changeset
198 }
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diff changeset
199 context->current_cycle = v_context->cycles/MCLKS_PER_68K;
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diff changeset
200 } else if (vdp_port < 0x18) {
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parents:
diff changeset
201 //TODO: Implement PSG
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parents:
diff changeset
202 } else {
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parents:
diff changeset
203 //TODO: Implement undocumented test register(s)
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diff changeset
204 }
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diff changeset
205 return context;
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parents:
diff changeset
206 }
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parents:
diff changeset
207
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diff changeset
208 m68k_context * vdp_port_read(uint32_t vdp_port, m68k_context * context)
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parents:
diff changeset
209 {
198
209a37eed3e7 Add support for breaking into the debugger while game is running
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parents: 197
diff changeset
210 sync_components(context, 0);
88
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diff changeset
211 vdp_context * v_context = context->next_context;
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parents:
diff changeset
212 if (vdp_port < 0x10) {
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parents:
diff changeset
213 if (vdp_port < 4) {
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parents:
diff changeset
214 context->value = vdp_data_port_read(v_context);
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parents:
diff changeset
215 } else if(vdp_port < 8) {
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diff changeset
216 context->value = vdp_control_port_read(v_context);
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parents:
diff changeset
217 } else {
137
0e7e1ccc0a81 Implemented HV counter
Mike Pavone <pavone@retrodev.com>
parents: 130
diff changeset
218 context->value = vdp_hv_counter_read(v_context);
0e7e1ccc0a81 Implemented HV counter
Mike Pavone <pavone@retrodev.com>
parents: 130
diff changeset
219 //printf("HV Counter: %X at cycle %d\n", context->value, v_context->cycles);
88
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parents:
diff changeset
220 }
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parents:
diff changeset
221 context->current_cycle = v_context->cycles/MCLKS_PER_68K;
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parents:
diff changeset
222 } else {
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parents:
diff changeset
223 printf("Illegal read from PSG or test register port %X\n", vdp_port);
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parents:
diff changeset
224 exit(1);
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parents:
diff changeset
225 }
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parents:
diff changeset
226 return context;
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parents:
diff changeset
227 }
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parents:
diff changeset
228
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parents:
diff changeset
229 #define TH 0x40
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parents:
diff changeset
230 #define TH_TIMEOUT 8000
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parents:
diff changeset
231 #define Z80_ACK_DELAY 3 //TODO: Calculate this on the fly based on how synced up the Z80 and 68K clocks are
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parents:
diff changeset
232
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parents:
diff changeset
233 uint8_t reset = 1;
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
234 uint8_t busreq = 0;
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
235 uint8_t busack = 0;
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parents:
diff changeset
236 uint32_t busack_cycle = CYCLE_NEVER;
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parents:
diff changeset
237 uint8_t new_busack = 0;
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parents:
diff changeset
238
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parents:
diff changeset
239 void io_adjust_cycles(io_port * pad, uint32_t current_cycle, uint32_t deduction)
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parents:
diff changeset
240 {
89
9757b4c6c33f Minor joypad fix and commeount out some debug printfs
Mike Pavone <pavone@retrodev.com>
parents: 88
diff changeset
241 /*uint8_t control = pad->control | 0x80;
88
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parents:
diff changeset
242 uint8_t th = control & pad->output;
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parents:
diff changeset
243 if (pad->input[GAMEPAD_TH0] || pad->input[GAMEPAD_TH1]) {
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parents:
diff changeset
244 printf("adjust_cycles | control: %X, TH: %X, GAMEPAD_TH0: %X, GAMEPAD_TH1: %X, TH Counter: %d, Timeout: %d, Cycle: %d\n", control, th, pad->input[GAMEPAD_TH0], pad->input[GAMEPAD_TH1], pad->th_counter,pad->timeout_cycle, current_cycle);
89
9757b4c6c33f Minor joypad fix and commeount out some debug printfs
Mike Pavone <pavone@retrodev.com>
parents: 88
diff changeset
245 }*/
88
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parents:
diff changeset
246 if (current_cycle >= pad->timeout_cycle) {
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parents:
diff changeset
247 pad->th_counter = 0;
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parents:
diff changeset
248 } else {
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parents:
diff changeset
249 pad->timeout_cycle -= deduction;
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parents:
diff changeset
250 }
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parents:
diff changeset
251 if (busack_cycle < CYCLE_NEVER && current_cycle < busack_cycle) {
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parents:
diff changeset
252 busack_cycle -= deduction;
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parents:
diff changeset
253 }
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parents:
diff changeset
254 }
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parents:
diff changeset
255
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parents:
diff changeset
256 void io_data_write(io_port * pad, m68k_context * context, uint8_t value)
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parents:
diff changeset
257 {
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parents:
diff changeset
258 if (pad->control & TH) {
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parents:
diff changeset
259 //check if TH has changed
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parents:
diff changeset
260 if ((pad->output & TH) ^ (value & TH)) {
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parents:
diff changeset
261 if (context->current_cycle >= pad->timeout_cycle) {
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parents:
diff changeset
262 pad->th_counter = 0;
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parents:
diff changeset
263 }
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
264 if (!(value & TH)) {
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parents:
diff changeset
265 pad->th_counter++;
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parents:
diff changeset
266 }
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parents:
diff changeset
267 pad->timeout_cycle = context->current_cycle + TH_TIMEOUT;
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parents:
diff changeset
268 }
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parents:
diff changeset
269 }
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parents:
diff changeset
270 pad->output = value;
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parents:
diff changeset
271 }
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parents:
diff changeset
272
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parents:
diff changeset
273 void io_data_read(io_port * pad, m68k_context * context)
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parents:
diff changeset
274 {
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parents:
diff changeset
275 uint8_t control = pad->control | 0x80;
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parents:
diff changeset
276 uint8_t th = control & pad->output;
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parents:
diff changeset
277 uint8_t input;
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parents:
diff changeset
278 if (context->current_cycle >= pad->timeout_cycle) {
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parents:
diff changeset
279 pad->th_counter = 0;
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parents:
diff changeset
280 }
89
9757b4c6c33f Minor joypad fix and commeount out some debug printfs
Mike Pavone <pavone@retrodev.com>
parents: 88
diff changeset
281 /*if (pad->input[GAMEPAD_TH0] || pad->input[GAMEPAD_TH1]) {
88
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parents:
diff changeset
282 printf("io_data_read | control: %X, TH: %X, GAMEPAD_TH0: %X, GAMEPAD_TH1: %X, TH Counter: %d, Timeout: %d, Cycle: %d\n", control, th, pad->input[GAMEPAD_TH0], pad->input[GAMEPAD_TH1], pad->th_counter,pad->timeout_cycle, context->current_cycle);
89
9757b4c6c33f Minor joypad fix and commeount out some debug printfs
Mike Pavone <pavone@retrodev.com>
parents: 88
diff changeset
283 }*/
88
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
284 if (th) {
195
c615061f7914 Fix 6-button controller emulation
Mike Pavone <pavone@retrodev.com>
parents: 186
diff changeset
285 if (pad->th_counter == 3) {
88
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parents:
diff changeset
286 input = pad->input[GAMEPAD_EXTRA];
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parents:
diff changeset
287 } else {
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parents:
diff changeset
288 input = pad->input[GAMEPAD_TH1];
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parents:
diff changeset
289 }
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
290 } else {
195
c615061f7914 Fix 6-button controller emulation
Mike Pavone <pavone@retrodev.com>
parents: 186
diff changeset
291 if (pad->th_counter == 3) {
88
c339559f1d4f Forgot to add blastem main file earlier
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parents:
diff changeset
292 input = pad->input[GAMEPAD_TH0] | 0xF;
195
c615061f7914 Fix 6-button controller emulation
Mike Pavone <pavone@retrodev.com>
parents: 186
diff changeset
293 } else if(pad->th_counter == 4) {
88
c339559f1d4f Forgot to add blastem main file earlier
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parents:
diff changeset
294 input = pad->input[GAMEPAD_TH0] & 0x30;
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parents:
diff changeset
295 } else {
89
9757b4c6c33f Minor joypad fix and commeount out some debug printfs
Mike Pavone <pavone@retrodev.com>
parents: 88
diff changeset
296 input = pad->input[GAMEPAD_TH0] | 0xC;
88
c339559f1d4f Forgot to add blastem main file earlier
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parents:
diff changeset
297 }
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parents:
diff changeset
298 }
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parents:
diff changeset
299 context->value = ((~input) & (~control)) | (pad->output & control);
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parents:
diff changeset
300 /*if (pad->input[GAMEPAD_TH0] || pad->input[GAMEPAD_TH1]) {
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parents:
diff changeset
301 printf ("value: %X\n", context->value);
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parents:
diff changeset
302 }*/
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parents:
diff changeset
303 }
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parents:
diff changeset
304
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parents:
diff changeset
305 m68k_context * io_write(uint32_t location, m68k_context * context, uint8_t value)
c339559f1d4f Forgot to add blastem main file earlier
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parents:
diff changeset
306 {
153
42c031184e8a Implement access to Z80 RAM
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parents: 149
diff changeset
307 if (location < 0x10000) {
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parents: 149
diff changeset
308 if (busack_cycle > context->current_cycle) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
309 busack = new_busack;
42c031184e8a Implement access to Z80 RAM
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parents: 149
diff changeset
310 busack_cycle = CYCLE_NEVER;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
311 }
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
312 if (!(busack || reset)) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
313 location &= 0x7FFF;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
314 if (location < 0x4000) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
315 z80_ram[location & 0x1FFF] = value;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
316 }
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
317 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
318 } else {
153
42c031184e8a Implement access to Z80 RAM
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parents: 149
diff changeset
319 location &= 0x1FFF;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
320 if (location < 0x100) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
321 switch(location/2)
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
322 {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
323 case 0x1:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
324 io_data_write(&gamepad_1, context, value);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
325 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
326 case 0x2:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
327 io_data_write(&gamepad_2, context, value);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
328 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
329 case 0x3://PORT C Data
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
330 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
331 case 0x4:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
332 gamepad_1.control = value;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
333 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
334 case 0x5:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
335 gamepad_2.control = value;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
336 break;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
337 }
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
338 } else {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
339 if (location == 0x1100) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
340 if (busack_cycle > context->current_cycle) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
341 busack = new_busack;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
342 busack_cycle = CYCLE_NEVER;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
343 }
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
344 if (value & 1) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
345 busreq = 1;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
346 if(!reset) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
347 busack_cycle = context->current_cycle + Z80_ACK_DELAY;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
348 new_busack = 0;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
349 }
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
350 } else {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
351 busreq = 0;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
352 busack_cycle = CYCLE_NEVER;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
353 busack = 1;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
354 }
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
355 } else if (location == 0x1200) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
356 if (value & 1) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
357 if (reset && busreq) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
358 new_busack = 0;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
359 busack_cycle = context->current_cycle + Z80_ACK_DELAY;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
360 }
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
361 reset = 0;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
362 } else {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
363 reset = 1;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
364 }
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
365 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
366 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
367 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
368 return context;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
369 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
370
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
371 m68k_context * io_write_w(uint32_t location, m68k_context * context, uint16_t value)
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
372 {
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
373 if (location < 0x10000) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
374 if (busack_cycle > context->current_cycle) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
375 busack = new_busack;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
376 busack_cycle = CYCLE_NEVER;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
377 }
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
378 if (!(busack || reset)) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
379 location &= 0x7FFF;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
380 if (location < 0x4000) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
381 z80_ram[location & 0x1FFE] = value >> 8;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
382 }
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
383 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
384 } else {
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
385 location &= 0x1FFF;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
386 if (location < 0x100) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
387 switch(location/2)
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
388 {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
389 case 0x1:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
390 io_data_write(&gamepad_1, context, value);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
391 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
392 case 0x2:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
393 io_data_write(&gamepad_2, context, value);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
394 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
395 case 0x3://PORT C Data
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
396 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
397 case 0x4:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
398 gamepad_1.control = value;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
399 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
400 case 0x5:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
401 gamepad_2.control = value;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
402 break;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
403 }
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
404 } else {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
405 //printf("IO Write of %X to %X @ %d\n", value, location, context->current_cycle);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
406 if (location == 0x1100) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
407 if (busack_cycle > context->current_cycle) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
408 busack = new_busack;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
409 busack_cycle = CYCLE_NEVER;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
410 }
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
411 if (value & 0x100) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
412 busreq = 1;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
413 if(!reset) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
414 busack_cycle = context->current_cycle + Z80_ACK_DELAY;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
415 new_busack = 0;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
416 }
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
417 } else {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
418 busreq = 0;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
419 busack_cycle = CYCLE_NEVER;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
420 busack = 1;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
421 }
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
422 } else if (location == 0x1200) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
423 if (value & 0x100) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
424 if (reset && busreq) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
425 new_busack = 0;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
426 busack_cycle = context->current_cycle + Z80_ACK_DELAY;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
427 }
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
428 reset = 0;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
429 } else {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
430 reset = 1;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
431 }
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
432 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
433 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
434 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
435 return context;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
436 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
437
130
0bdbffa9fe90 Make version register return correct value for USA
Mike Pavone <pavone@retrodev.com>
parents: 115
diff changeset
438 #define USA 0x80
0bdbffa9fe90 Make version register return correct value for USA
Mike Pavone <pavone@retrodev.com>
parents: 115
diff changeset
439 #define JAP 0x00
0bdbffa9fe90 Make version register return correct value for USA
Mike Pavone <pavone@retrodev.com>
parents: 115
diff changeset
440 #define EUR 0xC0
0bdbffa9fe90 Make version register return correct value for USA
Mike Pavone <pavone@retrodev.com>
parents: 115
diff changeset
441 #define NO_DISK 0x20
0bdbffa9fe90 Make version register return correct value for USA
Mike Pavone <pavone@retrodev.com>
parents: 115
diff changeset
442 uint8_t version_reg = NO_DISK | USA;
0bdbffa9fe90 Make version register return correct value for USA
Mike Pavone <pavone@retrodev.com>
parents: 115
diff changeset
443
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
444 m68k_context * io_read(uint32_t location, m68k_context * context)
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
445 {
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
446 if (location < 0x10000) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
447 if (busack_cycle > context->current_cycle) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
448 busack = new_busack;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
449 busack_cycle = CYCLE_NEVER;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
450 }
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
451 if (!(busack || reset)) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
452 location &= 0x7FFF;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
453 if (location < 0x4000) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
454 context->value = z80_ram[location & 0x1FFF];
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
455 } else {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
456 context->value = 0xFF;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
457 }
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
458 } else {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
459 context->value = 0xFF;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
460 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
461 } else {
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
462 location &= 0x1FFF;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
463 if (location < 0x100) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
464 switch(location/2)
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
465 {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
466 case 0x0:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
467 //version bits should be 0 for now since we're not emulating TMSS
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
468 //Not sure about the other bits
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
469 context->value = version_reg;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
470 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
471 case 0x1:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
472 io_data_read(&gamepad_1, context);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
473 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
474 case 0x2:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
475 io_data_read(&gamepad_2, context);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
476 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
477 case 0x3://PORT C Data
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
478 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
479 case 0x4:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
480 context->value = gamepad_1.control;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
481 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
482 case 0x5:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
483 context->value = gamepad_2.control;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
484 break;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
485 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
486 } else {
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
487 if (location == 0x1100) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
488 if (busack_cycle > context->current_cycle) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
489 busack = new_busack;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
490 busack_cycle = CYCLE_NEVER;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
491 }
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
492 context->value = reset || busack;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
493 //printf("Byte read of BUSREQ returned %d @ %d (reset: %d, busack: %d)\n", context->value, context->current_cycle, reset, busack);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
494 } else if (location == 0x1200) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
495 context->value = !reset;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
496 } else {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
497 printf("Byte read of unknown IO location: %X\n", location);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
498 }
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
499 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
500 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
501 return context;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
502 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
503
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
504 m68k_context * io_read_w(uint32_t location, m68k_context * context)
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
505 {
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
506 if (location < 0x10000) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
507 if (busack_cycle > context->current_cycle) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
508 busack = new_busack;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
509 busack_cycle = CYCLE_NEVER;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
510 }
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
511 if (!(busack || reset)) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
512 location &= 0x7FFF;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
513 if (location < 0x4000) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
514 context->value = z80_ram[location & 0x1FFE];
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
515 context->value |= context->value << 8;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
516 } else {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
517 context->value = 0xFFFF;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
518 }
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
519 } else {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
520 context->value = 0xFFFF;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
521 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
522 } else {
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
523 location &= 0x1FFF;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
524 if (location < 0x100) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
525 switch(location/2)
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
526 {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
527 case 0x0:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
528 //version bits should be 0 for now since we're not emulating TMSS
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
529 //Not sure about the other bits
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
530 context->value = 0;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
531 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
532 case 0x1:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
533 io_data_read(&gamepad_1, context);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
534 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
535 case 0x2:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
536 io_data_read(&gamepad_2, context);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
537 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
538 case 0x3://PORT C Data
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
539 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
540 case 0x4:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
541 context->value = gamepad_1.control;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
542 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
543 case 0x5:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
544 context->value = gamepad_2.control;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
545 break;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
546 case 0x6:
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
547 //PORT C Control
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
548 context->value = 0;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
549 break;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
550 }
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
551 context->value = context->value | (context->value << 8);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
552 //printf("Word read to %X returned %d\n", location, context->value);
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
553 } else {
153
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
554 if (location == 0x1100) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
555 if (busack_cycle > context->current_cycle) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
556 busack = new_busack;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
557 busack_cycle = CYCLE_NEVER;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
558 }
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
559 context->value = (reset || busack) << 8;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
560 //printf("Word read of BUSREQ returned %d\n", context->value);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
561 } else if (location == 0x1200) {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
562 context->value = (!reset) << 8;
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
563 } else {
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
564 printf("Word read of unknown IO location: %X\n", location);
42c031184e8a Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents: 149
diff changeset
565 }
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
566 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
567 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
568 return context;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
569 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
570
184
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
571 typedef struct bp_def {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
572 struct bp_def * next;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
573 uint32_t address;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
574 uint32_t index;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
575 } bp_def;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
576
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
577 bp_def * breakpoints = NULL;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
578 uint32_t bp_index = 0;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
579
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
580 bp_def ** find_breakpoint(bp_def ** cur, uint32_t address)
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
581 {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
582 while (*cur) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
583 if ((*cur)->address == address) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
584 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
585 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
586 cur = &((*cur)->next);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
587 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
588 return cur;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
589 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
590
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
591 bp_def ** find_breakpoint_idx(bp_def ** cur, uint32_t index)
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
592 {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
593 while (*cur) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
594 if ((*cur)->index == index) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
595 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
596 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
597 cur = &((*cur)->next);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
598 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
599 return cur;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
600 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
601
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
602 char * find_param(char * buf)
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
603 {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
604 for (; *buf; buf++) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
605 if (*buf == ' ') {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
606 if (*(buf+1)) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
607 return buf+1;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
608 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
609 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
610 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
611 return NULL;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
612 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
613
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
614 void strip_nl(char * buf)
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
615 {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
616 for(; *buf; buf++) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
617 if (*buf == '\n') {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
618 *buf = 0;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
619 return;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
620 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
621 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
622 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
623
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
624 m68k_context * debugger(m68k_context * context, uint32_t address)
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
625 {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
626 static char last_cmd[1024];
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
627 char input_buf[1024];
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
628 static uint32_t branch_t;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
629 static uint32_t branch_f;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
630 m68kinst inst;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
631 //probably not necessary, but let's play it safe
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
632 address &= 0xFFFFFF;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
633 if (address == branch_t) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
634 bp_def ** f_bp = find_breakpoint(&breakpoints, branch_f);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
635 if (!*f_bp) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
636 remove_breakpoint(context, branch_f);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
637 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
638 branch_t = branch_f = 0;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
639 } else if(address == branch_f) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
640 bp_def ** t_bp = find_breakpoint(&breakpoints, branch_t);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
641 if (!*t_bp) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
642 remove_breakpoint(context, branch_t);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
643 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
644 branch_t = branch_f = 0;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
645 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
646 //Check if this is a user set breakpoint, or just a temporary one
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
647 bp_def ** this_bp = find_breakpoint(&breakpoints, address);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
648 if (*this_bp) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
649 printf("Breakpoint %d hit\n", (*this_bp)->index);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
650 } else {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
651 remove_breakpoint(context, address);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
652 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
653 uint16_t * pc;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
654 if (address < 0x400000) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
655 pc = cart + address/2;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
656 } else if(address > 0xE00000) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
657 pc = ram + (address & 0xFFFF)/2;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
658 } else {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
659 fprintf(stderr, "Entered debugger at address %X\n", address);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
660 exit(1);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
661 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
662 uint16_t * after_pc = m68k_decode(pc, &inst, address);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
663 m68k_disasm(&inst, input_buf);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
664 printf("%X: %s\n", address, input_buf);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
665 uint32_t after = address + (after_pc-pc)*2;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
666 int debugging = 1;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
667 while (debugging) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
668 fputs(">", stdout);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
669 if (!fgets(input_buf, sizeof(input_buf), stdin)) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
670 fputs("fgets failed", stderr);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
671 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
672 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
673 strip_nl(input_buf);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
674 //hitting enter repeats last command
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
675 if (input_buf[0]) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
676 strcpy(last_cmd, input_buf);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
677 } else {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
678 strcpy(input_buf, last_cmd);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
679 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
680 char * param;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
681 char format[8];
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
682 uint32_t value;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
683 bp_def * new_bp;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
684 switch(input_buf[0])
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
685 {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
686 case 'c':
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
687 puts("Continuing");
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
688 debugging = 0;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
689 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
690 case 'b':
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
691 param = find_param(input_buf);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
692 if (!param) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
693 fputs("b command requires a parameter\n", stderr);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
694 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
695 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
696 value = strtol(param, NULL, 16);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
697 insert_breakpoint(context, value, (uint8_t *)debugger);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
698 new_bp = malloc(sizeof(bp_def));
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
699 new_bp->next = breakpoints;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
700 new_bp->address = value;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
701 new_bp->index = bp_index++;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
702 breakpoints = new_bp;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
703 printf("Breakpoint %d set at %X\n", new_bp->index, value);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
704 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
705 case 'a':
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
706 param = find_param(input_buf);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
707 if (!param) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
708 fputs("a command requires a parameter\n", stderr);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
709 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
710 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
711 value = strtol(param, NULL, 16);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
712 insert_breakpoint(context, value, (uint8_t *)debugger);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
713 debugging = 0;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
714 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
715 case 'd':
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
716 param = find_param(input_buf);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
717 if (!param) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
718 fputs("b command requires a parameter\n", stderr);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
719 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
720 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
721 value = atoi(param);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
722 this_bp = find_breakpoint_idx(&breakpoints, value);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
723 if (!*this_bp) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
724 fprintf(stderr, "Breakpoint %d does not exist\n", value);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
725 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
726 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
727 new_bp = *this_bp;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
728 *this_bp = (*this_bp)->next;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
729 free(new_bp);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
730 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
731 case 'p':
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
732 strcpy(format, "%s: %d\n");
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
733 if (input_buf[1] == '/') {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
734 switch (input_buf[2])
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
735 {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
736 case 'x':
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
737 case 'X':
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
738 case 'd':
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
739 case 'c':
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
740 format[5] = input_buf[2];
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
741 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
742 default:
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
743 fprintf(stderr, "Unrecognized format character: %c\n", input_buf[2]);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
744 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
745 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
746 param = find_param(input_buf);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
747 if (!param) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
748 fputs("p command requires a parameter\n", stderr);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
749 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
750 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
751 if (param[0] == 'd' && param[1] >= '0' && param[1] <= '7') {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
752 value = context->dregs[param[1]-'0'];
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
753 } else if (param[0] == 'a' && param[1] >= '0' && param[1] <= '7') {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
754 value = context->aregs[param[1]-'0'];
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
755 } else if (param[0] == 'S' && param[1] == 'R') {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
756 value = (context->status << 8);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
757 for (int flag = 0; flag < 5; flag++) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
758 value |= context->flags[flag] << (4-flag);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
759 }
185
b204fbed4efe Add ability to print out current 68K cycle in debugger
Mike Pavone <pavone@retrodev.com>
parents: 184
diff changeset
760 } else if(param[0] == 'c') {
b204fbed4efe Add ability to print out current 68K cycle in debugger
Mike Pavone <pavone@retrodev.com>
parents: 184
diff changeset
761 value = context->current_cycle;
184
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
762 } else if (param[0] == '0' && param[1] == 'x') {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
763 uint32_t p_addr = strtol(param+2, NULL, 16);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
764 value = read_dma_value(p_addr/2);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
765 } else {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
766 fprintf(stderr, "Unrecognized parameter to p: %s\n", param);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
767 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
768 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
769 printf(format, param, value);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
770 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
771 case 'n':
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
772 //TODO: Deal with jmp, dbcc, rtr and rte
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
773 if (inst.op == M68K_RTS) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
774 after = (read_dma_value(context->aregs[7]/2) << 16) | read_dma_value(context->aregs[7]/2 + 1);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
775 } else if(inst.op == M68K_BCC && inst.extra.cond != COND_FALSE) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
776 if (inst.extra.cond = COND_TRUE) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
777 after = inst.address + 2 + inst.src.params.immed;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
778 } else {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
779 branch_f = after;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
780 branch_t = inst.address + 2 + inst.src.params.immed;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
781 insert_breakpoint(context, branch_t, (uint8_t *)debugger);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
782 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
783 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
784 insert_breakpoint(context, after, (uint8_t *)debugger);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
785 debugging = 0;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
786 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
787 case 'q':
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
788 puts("Quitting");
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
789 exit(0);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
790 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
791 default:
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
792 fprintf(stderr, "Unrecognized debugger command %s\n", input_buf);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
793 break;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
794 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
795 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
796 return context;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
797 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
798
211
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
799 void init_run_cpu(vdp_context * vcontext, int debug, FILE * address_log)
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
800 {
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
801 m68k_context context;
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
802 x86_68k_options opts;
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
803 init_x86_68k_opts(&opts);
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
804 opts.address_log = address_log;
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
805 init_68k_context(&context, opts.native_code_map, &opts);
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
806
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
807 context.next_context = vcontext;
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
808 //cartridge ROM
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
809 context.mem_pointers[0] = cart;
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
810 context.target_cycle = context.sync_cycle = MCLKS_PER_FRAME/MCLKS_PER_68K;
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
811 //work RAM
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
812 context.mem_pointers[1] = ram;
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
813 uint32_t address;
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
814 /*address = cart[0x68/2] << 16 | cart[0x6A/2];
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
815 translate_m68k_stream(address, &context);
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
816 address = cart[0x70/2] << 16 | cart[0x72/2];
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
817 translate_m68k_stream(address, &context);
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
818 address = cart[0x78/2] << 16 | cart[0x7A/2];
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
819 translate_m68k_stream(address, &context);*/
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
820 address = cart[2] << 16 | cart[3];
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
821 translate_m68k_stream(address, &context);
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
822 if (debug) {
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
823 insert_breakpoint(&context, address, (uint8_t *)debugger);
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
824 }
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
825 m68k_reset(&context);
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
826 }
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
827
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
828 int main(int argc, char ** argv)
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
829 {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
830 if (argc < 2) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
831 fputs("Usage: blastem FILENAME\n", stderr);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
832 return 1;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
833 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
834 if(!load_rom(argv[1])) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
835 fprintf(stderr, "Failed to open %s for reading\n", argv[1]);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
836 return 1;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
837 }
184
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
838 int width = -1;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
839 int height = -1;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
840 int debug = 0;
197
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 195
diff changeset
841 FILE *address_log = NULL;
184
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
842 for (int i = 2; i < argc; i++) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
843 if (argv[i][0] == '-') {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
844 switch(argv[i][1]) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
845 case 'd':
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
846 debug = 1;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
847 break;
197
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 195
diff changeset
848 case 'l':
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 195
diff changeset
849 address_log = fopen("address.log", "w");
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 195
diff changeset
850 break;
184
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
851 default:
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
852 fprintf(stderr, "Unrecognized switch %s\n", argv[i]);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
853 return 1;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
854 }
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
855 } else if (width < 0) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
856 width = atoi(argv[i]);
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
857 } else if (height < 0) {
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
858 height = atoi(argv[i]);
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
859 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
860 }
184
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
861 width = width < 320 ? 320 : width;
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 166
diff changeset
862 height = height < 240 ? (width/320) * 240 : height;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
863 render_init(width, height);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
864 vdp_context v_context;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
865
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
866 init_vdp_context(&v_context);
211
464513050c85 Small bit of cleanup
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
867 init_run_cpu(&v_context, debug, address_log);
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
868 return 0;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
869 }