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annotate blastem.c @ 149:139e5dcd6aa3

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Make writes to control and data port block when DMA is in progress
author Mike Pavone <pavone@retrodev.com>
date Tue, 01 Jan 2013 07:06:57 -0800
parents 177ba1a5af9c
children 42c031184e8a
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88
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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
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10 #define CARTRIDGE_WORDS 0x200000
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11 #define RAM_WORDS 32 * 1024
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12 #define MCLKS_PER_68K 7
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13 //TODO: Figure out the exact value for this
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14 #define MCLKS_PER_FRAME (MCLKS_LINE*262)
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15 #define CYCLE_NEVER 0xFFFFFFFF
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16
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17 uint16_t cart[CARTRIDGE_WORDS];
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18 uint16_t ram[RAM_WORDS];
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19
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20 io_port gamepad_1;
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21 io_port gamepad_2;
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22
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23 #ifndef MIN
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24 #define MIN(a,b) ((a) < (b) ? (a) : (b))
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25 #endif
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26
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27 int load_rom(char * filename)
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28 {
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29 FILE * f = fopen(filename, "rb");
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30 if (!f) {
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31 return 0;
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32 }
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33 fseek(f, 0, SEEK_END);
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34 long filesize = ftell(f);
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35 fseek(f, 0, SEEK_SET);
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36 fread(cart, 2, MIN(filesize/2, CARTRIDGE_WORDS), f);
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37 fclose(f);
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38 for(unsigned short * cur = cart; cur - cart < (filesize/2); ++cur)
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39 {
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40 *cur = (*cur >> 8) | (*cur << 8);
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41 }
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42 //TODO: Mirror ROM
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43 return 1;
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44 }
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45
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46 uint16_t read_dma_value(uint32_t address)
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47 {
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48 //addresses here are word addresses (i.e. bit 0 corresponds to A1), so no need to do div by 2
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49 if (address < 0x200000) {
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50 return cart[address];
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51 } else if(address >= 0x700000) {
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52 return ram[address & 0x7FFF];
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53 }
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54 //TODO: Figure out what happens when you try to DMA from weird adresses like IO or banked Z80 area
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55 return 0;
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56 }
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57
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58 #define VINT_CYCLE ((MCLKS_LINE * 226)/MCLKS_PER_68K)
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59
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60 m68k_context * sync_components(m68k_context * context)
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61 {
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62 //TODO: Handle sync targets smaller than a single frame
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63 vdp_context * v_context = context->next_context;
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64 uint32_t mclks = context->current_cycle * MCLKS_PER_68K;
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65 if (mclks >= MCLKS_PER_FRAME) {
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66 //printf("reached frame end | 68K Cycles: %d, MCLK Cycles: %d\n", context->current_cycle, mclks);
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67 vdp_run_context(v_context, MCLKS_PER_FRAME);
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68 wait_render_frame(v_context);
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69 mclks -= MCLKS_PER_FRAME;
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70 vdp_adjust_cycles(v_context, MCLKS_PER_FRAME);
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71 io_adjust_cycles(&gamepad_1, context->current_cycle, MCLKS_PER_FRAME/MCLKS_PER_68K);
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72 io_adjust_cycles(&gamepad_2, context->current_cycle, MCLKS_PER_FRAME/MCLKS_PER_68K);
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73 context->current_cycle -= MCLKS_PER_FRAME/MCLKS_PER_68K;
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74 if (mclks) {
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75 vdp_run_context(v_context, mclks);
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76 }
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77 if (v_context->regs[REG_MODE_2] & 0x20 && ((context->status & 0x7) < 6)) {
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78 if (context->int_cycle > VINT_CYCLE) {
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79 context->int_cycle = VINT_CYCLE;
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80 context->int_num = 6;
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81 if (context->int_cycle < context->sync_cycle) {
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82 context->target_cycle = context->int_cycle;
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83 }
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84 }
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85 } else {
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86 context->int_cycle = 0xFFFFFFFF;
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87 context->target_cycle = context->sync_cycle;
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88 }
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89 } else {
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90 //printf("running VDP for %d cycles\n", mclks - v_context->cycles);
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91 vdp_run_context(v_context, mclks);
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92 if (v_context->regs[REG_MODE_2] & 0x20 && ((context->status & 0x7) < 6)) {
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93 if (context->int_cycle > VINT_CYCLE) {
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94 context->int_cycle = VINT_CYCLE;
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95 context->int_num = 6;
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96 if (context->int_cycle < context->sync_cycle && context->int_cycle < context->current_cycle) {
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97 context->target_cycle = context->int_cycle;
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98 }
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99 }
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100 if (context->int_cycle <= context->current_cycle) {
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101 context->int_cycle = CYCLE_NEVER;
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102 context->target_cycle = context->sync_cycle;
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103 }
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104 } else {
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105 context->int_cycle = CYCLE_NEVER;
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106 context->target_cycle = context->sync_cycle;
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107 }
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108 }
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109 return context;
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110 }
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111
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112 m68k_context * vdp_port_write(uint32_t vdp_port, m68k_context * context, uint16_t value)
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113 {
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114 //printf("vdp_port write: %X, value: %X, cycle: %d\n", vdp_port, value, context->current_cycle);
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115 sync_components(context);
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116 vdp_context * v_context = context->next_context;
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117 if (vdp_port < 0x10) {
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118 int blocked;
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119 if (vdp_port < 4) {
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120 while (vdp_data_port_write(v_context, value) < 0) {
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121 while(v_context->flags & FLAG_DMA_RUN) {
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122 vdp_run_dma_done(v_context, MCLKS_PER_FRAME);
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123 if (v_context->cycles >= MCLKS_PER_FRAME) {
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124 wait_render_frame(v_context);
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125 vdp_adjust_cycles(v_context, MCLKS_PER_FRAME);
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126 io_adjust_cycles(&gamepad_1, v_context->cycles/MCLKS_PER_68K, MCLKS_PER_FRAME/MCLKS_PER_68K);
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127 io_adjust_cycles(&gamepad_2, v_context->cycles/MCLKS_PER_68K, MCLKS_PER_FRAME/MCLKS_PER_68K);
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128 }
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129 }
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130 context->current_cycle = v_context->cycles / MCLKS_PER_68K;
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131 }
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132 } else if(vdp_port < 8) {
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133 blocked = vdp_control_port_write(v_context, value);
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134 if (blocked) {
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135 while (blocked) {
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
136 while(v_context->flags & FLAG_DMA_RUN) {
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress
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parents: 144
diff changeset
137 vdp_run_dma_done(v_context, MCLKS_PER_FRAME);
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
138 if (v_context->cycles >= MCLKS_PER_FRAME) {
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress
Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
139 wait_render_frame(v_context);
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
140 vdp_adjust_cycles(v_context, MCLKS_PER_FRAME);
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
141 io_adjust_cycles(&gamepad_1, v_context->cycles/MCLKS_PER_68K, MCLKS_PER_FRAME/MCLKS_PER_68K);
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
142 io_adjust_cycles(&gamepad_2, v_context->cycles/MCLKS_PER_68K, MCLKS_PER_FRAME/MCLKS_PER_68K);
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
143 }
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress
Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
144 }
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress
Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
145 if (blocked < 0) {
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress
Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
146 blocked = vdp_control_port_write(v_context, value);
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress
Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
147 } else {
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
148 blocked = 0;
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Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
149 }
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress
Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
150 }
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress
Mike Pavone <pavone@retrodev.com>
parents: 144
diff changeset
151 context->current_cycle = v_context->cycles / MCLKS_PER_68K;
88
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parents:
diff changeset
152 } else {
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parents:
diff changeset
153 if (v_context->regs[REG_MODE_2] & 0x20 && ((context->status & 0x7) < 6)) {
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parents:
diff changeset
154 if (context->int_cycle > VINT_CYCLE) {
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parents:
diff changeset
155 context->int_cycle = VINT_CYCLE;
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parents:
diff changeset
156 context->int_num = 6;
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parents:
diff changeset
157 if (context->int_cycle < context->sync_cycle) {
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parents:
diff changeset
158 context->target_cycle = context->int_cycle;
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parents:
diff changeset
159 }
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parents:
diff changeset
160 }
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parents:
diff changeset
161 } else {
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parents:
diff changeset
162 context->int_cycle = 0xFFFFFFFF;
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parents:
diff changeset
163 context->target_cycle = context->sync_cycle;
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parents:
diff changeset
164 }
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parents:
diff changeset
165 }
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parents:
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166 } else {
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diff changeset
167 printf("Illegal write to HV Counter port %X\n", vdp_port);
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168 exit(1);
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parents:
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169 }
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170 context->current_cycle = v_context->cycles/MCLKS_PER_68K;
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parents:
diff changeset
171 } else if (vdp_port < 0x18) {
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parents:
diff changeset
172 //TODO: Implement PSG
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parents:
diff changeset
173 } else {
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parents:
diff changeset
174 //TODO: Implement undocumented test register(s)
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parents:
diff changeset
175 }
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parents:
diff changeset
176 return context;
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parents:
diff changeset
177 }
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parents:
diff changeset
178
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parents:
diff changeset
179 m68k_context * vdp_port_read(uint32_t vdp_port, m68k_context * context)
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parents:
diff changeset
180 {
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parents:
diff changeset
181 sync_components(context);
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parents:
diff changeset
182 vdp_context * v_context = context->next_context;
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parents:
diff changeset
183 if (vdp_port < 0x10) {
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parents:
diff changeset
184 if (vdp_port < 4) {
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parents:
diff changeset
185 context->value = vdp_data_port_read(v_context);
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parents:
diff changeset
186 } else if(vdp_port < 8) {
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parents:
diff changeset
187 context->value = vdp_control_port_read(v_context);
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parents:
diff changeset
188 } else {
137
0e7e1ccc0a81 Implemented HV counter
Mike Pavone <pavone@retrodev.com>
parents: 130
diff changeset
189 context->value = vdp_hv_counter_read(v_context);
0e7e1ccc0a81 Implemented HV counter
Mike Pavone <pavone@retrodev.com>
parents: 130
diff changeset
190 //printf("HV Counter: %X at cycle %d\n", context->value, v_context->cycles);
88
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parents:
diff changeset
191 }
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parents:
diff changeset
192 context->current_cycle = v_context->cycles/MCLKS_PER_68K;
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parents:
diff changeset
193 } else {
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parents:
diff changeset
194 printf("Illegal read from PSG or test register port %X\n", vdp_port);
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parents:
diff changeset
195 exit(1);
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parents:
diff changeset
196 }
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parents:
diff changeset
197 return context;
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parents:
diff changeset
198 }
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parents:
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199
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diff changeset
200 #define TH 0x40
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parents:
diff changeset
201 #define TH_TIMEOUT 8000
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parents:
diff changeset
202 #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
203
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parents:
diff changeset
204 uint8_t reset = 1;
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parents:
diff changeset
205 uint8_t busreq = 0;
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parents:
diff changeset
206 uint8_t busack = 0;
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parents:
diff changeset
207 uint32_t busack_cycle = CYCLE_NEVER;
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parents:
diff changeset
208 uint8_t new_busack = 0;
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parents:
diff changeset
209
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parents:
diff changeset
210 void io_adjust_cycles(io_port * pad, uint32_t current_cycle, uint32_t deduction)
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parents:
diff changeset
211 {
89
9757b4c6c33f Minor joypad fix and commeount out some debug printfs
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parents: 88
diff changeset
212 /*uint8_t control = pad->control | 0x80;
88
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parents:
diff changeset
213 uint8_t th = control & pad->output;
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parents:
diff changeset
214 if (pad->input[GAMEPAD_TH0] || pad->input[GAMEPAD_TH1]) {
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parents:
diff changeset
215 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
216 }*/
88
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parents:
diff changeset
217 if (current_cycle >= pad->timeout_cycle) {
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parents:
diff changeset
218 pad->th_counter = 0;
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parents:
diff changeset
219 } else {
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parents:
diff changeset
220 pad->timeout_cycle -= deduction;
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parents:
diff changeset
221 }
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parents:
diff changeset
222 if (busack_cycle < CYCLE_NEVER && current_cycle < busack_cycle) {
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parents:
diff changeset
223 busack_cycle -= deduction;
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parents:
diff changeset
224 }
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parents:
diff changeset
225 }
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parents:
diff changeset
226
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parents:
diff changeset
227 void io_data_write(io_port * pad, m68k_context * context, uint8_t value)
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parents:
diff changeset
228 {
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parents:
diff changeset
229 if (pad->control & TH) {
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parents:
diff changeset
230 //check if TH has changed
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parents:
diff changeset
231 if ((pad->output & TH) ^ (value & TH)) {
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parents:
diff changeset
232 if (context->current_cycle >= pad->timeout_cycle) {
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parents:
diff changeset
233 pad->th_counter = 0;
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parents:
diff changeset
234 }
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parents:
diff changeset
235 if (!(value & TH)) {
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parents:
diff changeset
236 pad->th_counter++;
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parents:
diff changeset
237 }
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parents:
diff changeset
238 pad->timeout_cycle = context->current_cycle + TH_TIMEOUT;
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parents:
diff changeset
239 }
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parents:
diff changeset
240 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
241 pad->output = value;
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parents:
diff changeset
242 }
c339559f1d4f Forgot to add blastem main file earlier
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parents:
diff changeset
243
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parents:
diff changeset
244 void io_data_read(io_port * pad, m68k_context * context)
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parents:
diff changeset
245 {
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parents:
diff changeset
246 uint8_t control = pad->control | 0x80;
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parents:
diff changeset
247 uint8_t th = control & pad->output;
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parents:
diff changeset
248 uint8_t input;
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parents:
diff changeset
249 if (context->current_cycle >= pad->timeout_cycle) {
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parents:
diff changeset
250 pad->th_counter = 0;
c339559f1d4f Forgot to add blastem main file earlier
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parents:
diff changeset
251 }
89
9757b4c6c33f Minor joypad fix and commeount out some debug printfs
Mike Pavone <pavone@retrodev.com>
parents: 88
diff changeset
252 /*if (pad->input[GAMEPAD_TH0] || pad->input[GAMEPAD_TH1]) {
88
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parents:
diff changeset
253 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
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parents: 88
diff changeset
254 }*/
88
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parents:
diff changeset
255 if (th) {
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parents:
diff changeset
256 if (pad->th_counter == 2) {
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parents:
diff changeset
257 input = pad->input[GAMEPAD_EXTRA];
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parents:
diff changeset
258 } else {
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parents:
diff changeset
259 input = pad->input[GAMEPAD_TH1];
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parents:
diff changeset
260 }
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parents:
diff changeset
261 } else {
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parents:
diff changeset
262 if (pad->th_counter == 2) {
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parents:
diff changeset
263 input = pad->input[GAMEPAD_TH0] | 0xF;
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parents:
diff changeset
264 } else if(pad->th_counter == 3) {
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parents:
diff changeset
265 input = pad->input[GAMEPAD_TH0] & 0x30;
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parents:
diff changeset
266 } else {
89
9757b4c6c33f Minor joypad fix and commeount out some debug printfs
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parents: 88
diff changeset
267 input = pad->input[GAMEPAD_TH0] | 0xC;
88
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parents:
diff changeset
268 }
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parents:
diff changeset
269 }
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parents:
diff changeset
270 context->value = ((~input) & (~control)) | (pad->output & control);
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parents:
diff changeset
271 /*if (pad->input[GAMEPAD_TH0] || pad->input[GAMEPAD_TH1]) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
272 printf ("value: %X\n", context->value);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
273 }*/
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
274 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
275
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
276 m68k_context * io_write(uint32_t location, m68k_context * context, uint8_t value)
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
277 {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
278 if (location < 0x100) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
279 switch(location/2)
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
280 {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
281 case 0x1:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
282 io_data_write(&gamepad_1, context, value);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
283 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
284 case 0x2:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
285 io_data_write(&gamepad_2, context, value);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
286 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
287 case 0x3://PORT C Data
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
288 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
289 case 0x4:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
290 gamepad_1.control = value;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
291 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
292 case 0x5:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
293 gamepad_2.control = value;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
294 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
295 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
296 } else {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
297 if (location == 0x1100) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
298 if (busack_cycle > context->current_cycle) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
299 busack = new_busack;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
300 busack_cycle = CYCLE_NEVER;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
301 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
302 if (value & 1) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
303 busreq = 1;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
304 if(!reset) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
305 busack_cycle = context->current_cycle + Z80_ACK_DELAY;
115
11d72e471104 Fix Z80 busreq logic
Mike Pavone <pavone@retrodev.com>
parents: 103
diff changeset
306 new_busack = 0;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
307 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
308 } else {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
309 busreq = 0;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
310 busack_cycle = CYCLE_NEVER;
115
11d72e471104 Fix Z80 busreq logic
Mike Pavone <pavone@retrodev.com>
parents: 103
diff changeset
311 busack = 1;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
312 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
313 } else if (location == 0x1200) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
314 if (value & 1) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
315 if (reset && busreq) {
115
11d72e471104 Fix Z80 busreq logic
Mike Pavone <pavone@retrodev.com>
parents: 103
diff changeset
316 new_busack = 0;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
317 busack_cycle = context->current_cycle + Z80_ACK_DELAY;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
318 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
319 reset = 0;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
320 } else {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
321 reset = 1;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
322 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
323 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
324 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
325 return context;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
326 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
327
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
328 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
329 {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
330 if (location < 0x100) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
331 switch(location/2)
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
332 {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
333 case 0x1:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
334 io_data_write(&gamepad_1, context, value);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
335 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
336 case 0x2:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
337 io_data_write(&gamepad_2, context, value);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
338 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
339 case 0x3://PORT C Data
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
340 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
341 case 0x4:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
342 gamepad_1.control = value;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
343 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
344 case 0x5:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
345 gamepad_2.control = value;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
346 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
347 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
348 } else {
144
177ba1a5af9c Comment out some debug printfs
Mike Pavone <pavone@retrodev.com>
parents: 137
diff changeset
349 //printf("IO Write of %X to %X @ %d\n", value, location, context->current_cycle);
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
350 if (location == 0x1100) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
351 if (busack_cycle > context->current_cycle) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
352 busack = new_busack;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
353 busack_cycle = CYCLE_NEVER;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
354 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
355 if (value & 0x100) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
356 busreq = 1;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
357 if(!reset) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
358 busack_cycle = context->current_cycle + Z80_ACK_DELAY;
115
11d72e471104 Fix Z80 busreq logic
Mike Pavone <pavone@retrodev.com>
parents: 103
diff changeset
359 new_busack = 0;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
360 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
361 } else {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
362 busreq = 0;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
363 busack_cycle = CYCLE_NEVER;
115
11d72e471104 Fix Z80 busreq logic
Mike Pavone <pavone@retrodev.com>
parents: 103
diff changeset
364 busack = 1;
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 } else if (location == 0x1200) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
367 if (value & 0x100) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
368 if (reset && busreq) {
115
11d72e471104 Fix Z80 busreq logic
Mike Pavone <pavone@retrodev.com>
parents: 103
diff changeset
369 new_busack = 0;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
370 busack_cycle = context->current_cycle + Z80_ACK_DELAY;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
371 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
372 reset = 0;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
373 } else {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
374 reset = 1;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
375 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
376 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
377 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
378 return context;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
379 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
380
130
0bdbffa9fe90 Make version register return correct value for USA
Mike Pavone <pavone@retrodev.com>
parents: 115
diff changeset
381 #define USA 0x80
0bdbffa9fe90 Make version register return correct value for USA
Mike Pavone <pavone@retrodev.com>
parents: 115
diff changeset
382 #define JAP 0x00
0bdbffa9fe90 Make version register return correct value for USA
Mike Pavone <pavone@retrodev.com>
parents: 115
diff changeset
383 #define EUR 0xC0
0bdbffa9fe90 Make version register return correct value for USA
Mike Pavone <pavone@retrodev.com>
parents: 115
diff changeset
384 #define NO_DISK 0x20
0bdbffa9fe90 Make version register return correct value for USA
Mike Pavone <pavone@retrodev.com>
parents: 115
diff changeset
385 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
386
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
387 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
388 {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
389 if (location < 0x100) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
390 switch(location/2)
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
391 {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
392 case 0x0:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
393 //version bits should be 0 for now since we're not emulating TMSS
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
394 //Not sure about the other bits
130
0bdbffa9fe90 Make version register return correct value for USA
Mike Pavone <pavone@retrodev.com>
parents: 115
diff changeset
395 context->value = version_reg;
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
396 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
397 case 0x1:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
398 io_data_read(&gamepad_1, context);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
399 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
400 case 0x2:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
401 io_data_read(&gamepad_2, context);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
402 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
403 case 0x3://PORT C Data
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
404 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
405 case 0x4:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
406 context->value = gamepad_1.control;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
407 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
408 case 0x5:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
409 context->value = gamepad_2.control;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
410 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
411 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
412 } else {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
413 if (location == 0x1100) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
414 if (busack_cycle > context->current_cycle) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
415 busack = new_busack;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
416 busack_cycle = CYCLE_NEVER;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
417 }
115
11d72e471104 Fix Z80 busreq logic
Mike Pavone <pavone@retrodev.com>
parents: 103
diff changeset
418 context->value = reset || busack;
144
177ba1a5af9c Comment out some debug printfs
Mike Pavone <pavone@retrodev.com>
parents: 137
diff changeset
419 //printf("Byte read of BUSREQ returned %d @ %d (reset: %d, busack: %d)\n", context->value, context->current_cycle, reset, busack);
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
420 } else if (location == 0x1200) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
421 context->value = !reset;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
422 } else {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
423 printf("Byte read of unknown IO location: %X\n", location);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
424 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
425 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
426 return context;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
427 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
428
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
429 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
430 {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
431 if (location < 0x100) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
432 switch(location/2)
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 case 0x0:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
435 //version bits should be 0 for now since we're not emulating TMSS
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
436 //Not sure about the other bits
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
437 context->value = 0;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
438 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
439 case 0x1:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
440 io_data_read(&gamepad_1, context);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
441 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
442 case 0x2:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
443 io_data_read(&gamepad_2, context);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
444 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
445 case 0x3://PORT C Data
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
446 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
447 case 0x4:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
448 context->value = gamepad_1.control;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
449 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
450 case 0x5:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
451 context->value = gamepad_2.control;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
452 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
453 case 0x6:
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
454 //PORT C Control
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
455 context->value = 0;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
456 break;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
457 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
458 context->value = context->value | (context->value << 8);
89
9757b4c6c33f Minor joypad fix and commeount out some debug printfs
Mike Pavone <pavone@retrodev.com>
parents: 88
diff changeset
459 //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
460 } else {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
461 if (location == 0x1100) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
462 if (busack_cycle > context->current_cycle) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
463 busack = new_busack;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
464 busack_cycle = CYCLE_NEVER;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
465 }
115
11d72e471104 Fix Z80 busreq logic
Mike Pavone <pavone@retrodev.com>
parents: 103
diff changeset
466 context->value = (reset || busack) << 8;
144
177ba1a5af9c Comment out some debug printfs
Mike Pavone <pavone@retrodev.com>
parents: 137
diff changeset
467 //printf("Word read of BUSREQ returned %d\n", context->value);
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
468 } else if (location == 0x1200) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
469 context->value = (!reset) << 8;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
470 } else {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
471 printf("Word read of unknown IO location: %X\n", location);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
472 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
473 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
474 return context;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
475 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
476
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
477 int main(int argc, char ** argv)
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
478 {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
479 if (argc < 2) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
480 fputs("Usage: blastem FILENAME\n", stderr);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
481 return 1;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
482 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
483 if(!load_rom(argv[1])) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
484 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
485 return 1;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
486 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
487 int width = 320;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
488 int height = 240;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
489 if (argc > 2) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
490 width = atoi(argv[2]);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
491 if (argc > 3) {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
492 height = atoi(argv[3]);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
493 } else {
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
494 height = (width/320) * 240;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
495 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
496 }
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
497 render_init(width, height);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
498
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
499 x86_68k_options opts;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
500 m68k_context context;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
501 vdp_context v_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 init_x86_68k_opts(&opts);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
504 init_68k_context(&context, opts.native_code_map, &opts);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
505 init_vdp_context(&v_context);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
506 context.next_context = &v_context;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
507 //cartridge ROM
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
508 context.mem_pointers[0] = cart;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
509 context.target_cycle = context.sync_cycle = MCLKS_PER_FRAME/MCLKS_PER_68K;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
510 //work RAM
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
511 context.mem_pointers[1] = ram;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
512 uint32_t address;
103
a71544cd01ea Don't pre-emptively translate code at interrupt vectors as some PD ROMs have these pointing at junk. Need some kind of heuristic for detecting garbage if I'm going to translate them ahead of time by default.
Mike Pavone <pavone@retrodev.com>
parents: 95
diff changeset
513 /*address = cart[0x68/2] << 16 | cart[0x6A/2];
95
dd3c680c618c Initial work on allowing dynamic branches and code in RAM plus a small fix to effective address decoding
Mike Pavone <pavone@retrodev.com>
parents: 89
diff changeset
514 translate_m68k_stream(address, &context);
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
515 address = cart[0x70/2] << 16 | cart[0x72/2];
95
dd3c680c618c Initial work on allowing dynamic branches and code in RAM plus a small fix to effective address decoding
Mike Pavone <pavone@retrodev.com>
parents: 89
diff changeset
516 translate_m68k_stream(address, &context);
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
517 address = cart[0x78/2] << 16 | cart[0x7A/2];
103
a71544cd01ea Don't pre-emptively translate code at interrupt vectors as some PD ROMs have these pointing at junk. Need some kind of heuristic for detecting garbage if I'm going to translate them ahead of time by default.
Mike Pavone <pavone@retrodev.com>
parents: 95
diff changeset
518 translate_m68k_stream(address, &context);*/
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
519 address = cart[2] << 16 | cart[3];
95
dd3c680c618c Initial work on allowing dynamic branches and code in RAM plus a small fix to effective address decoding
Mike Pavone <pavone@retrodev.com>
parents: 89
diff changeset
520 translate_m68k_stream(address, &context);
88
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
521 m68k_reset(&context);
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
522 return 0;
c339559f1d4f Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
523 }