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annotate src/main.c @ 30:78068060313a

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Fixed memory flags on RAM
author Michael Pavone <pavone@retrodev.com>
date Sun, 03 Apr 2016 18:37:14 -0700
parents c677507682e3
children eda4919d955f
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1 #include <stdint.h>
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2 #include <stdio.h>
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3 #include <stdlib.h>
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4 #include <string.h>
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5 #include "cpu.h"
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6 #include "vdp.h"
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7 #include "audio.h"
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8 #include "timer.h"
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9 #include "controller.h"
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04d8efe7a1f0 Initial stab at video output and background color rendering. Fixed address decoding in address port write handler.
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10 #include "system.h"
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11
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12 #define CYCLES_PER_FRAME (832*262)
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13 #define MASTER_CLOCK 13056000
0
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14
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15 uint8_t rom[48 * 1024];
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16 uint8_t ram[16 * 1024];
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17
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18 enum {
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19 PORT_CONTROLLER_1,
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20 PORT_CONTROLLER_2,
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21 RESERVED_1,
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22 RESERVED_2,
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23 PORT_FREQUENCY_A,
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24 PORT_FREQUENCY_B,
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25 PORT_FREQUENCY_C,
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26 PORT_FREQUENCY_D,
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27 PORT_VOLUME_AB,
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28 PORT_VOLUME_CD,
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29 PORT_TIMER,
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30 PORT_SERIAL,
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31 PORT_VERTICAL,
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32 PORT_HORIZONTAL,
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33 PORT_VRAM_ADDRESS,
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34 PORT_VRAM_DATA
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35 };
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36
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37 typedef struct {
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38 cpu *proc;
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39 audio *audio;
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40 timer timer;
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41 controllers pads;
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42 vdp video;
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43 } console;
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44
0
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45 void debug_port_write(cpu *context, uint8_t port, uint16_t value)
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46 {
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47 putchar(value);
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48 }
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49
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50 uint16_t debug_port_read(cpu *context, uint8_t port)
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51 {
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52 return getchar();
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53 }
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54
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55 void vertical_port_write(cpu *context, uint8_t port, uint16_t value)
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56 {
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57 console *system = context->system;
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58 vdp_run(&system->video, context->cycles);
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59 system->video.vscroll = value;
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60 }
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61
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62 uint16_t vertical_port_read(cpu *context, uint8_t port)
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63 {
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64 console *system = context->system;
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65 vdp_run(&system->video, context->cycles);
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66 return system->video.vcounter;
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67 }
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68
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69 void horizontal_port_write(cpu *context, uint8_t port, uint16_t value)
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70 {
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71 console *system = context->system;
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72 vdp_run(&system->video, context->cycles);
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73 vdp_write_hscroll(&system->video, value);
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74 }
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75
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76 uint16_t horizontal_port_read(cpu *context, uint8_t port)
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77 {
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78 console *system = context->system;
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79 vdp_run(&system->video, context->cycles);
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80 return system->video.hcounter;
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81 }
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82
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83 void address_port_write(cpu *context, uint8_t port, uint16_t value)
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84 {
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85 console *system = context->system;
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86 vdp_run(&system->video, context->cycles);
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87 vdp_write_address(&system->video, value);
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88 }
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89
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90 uint16_t address_port_read(cpu *context, uint8_t port)
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91 {
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92 console *system = context->system;
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93 vdp_run(&system->video, context->cycles);
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94 return system->video.status;
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95 }
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96
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97 void data_port_write(cpu *context, uint8_t port, uint16_t value)
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98 {
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99 console *system = context->system;
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100 vdp_run(&system->video, context->cycles);
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101 vdp_write_data(&system->video, value);
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102 }
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103
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104 void frequency_port_write(cpu *context, uint8_t port, uint16_t value)
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105 {
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106 console *system = context->system;
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107 audio_run(system->audio, context->cycles);
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108 audio_write_freq(system->audio, port - PORT_FREQUENCY_A, value);
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109 }
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110
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111 void volume_port_write(cpu *context, uint8_t port, uint16_t value)
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112 {
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113 console *system = context->system;
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114 audio_run(system->audio, context->cycles);
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115 audio_write_vol(system->audio, port - PORT_VOLUME_AB, value);
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116 }
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117
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118 void timer_port_write(cpu *context, uint8_t port, uint16_t value)
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119 {
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120 console *system = context->system;
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121 timer_run(&system->timer, context->cycles);
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122 timer_write(&system->timer, value);
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123 uint32_t next_int = next_interrupt_cycle(context, (~context->pending_interrupts) & 3);
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124 if (next_int < context->current_target) {
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125 context->current_target = next_int;
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126 }
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127 }
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128
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129 uint16_t controller_port_read(cpu *context, uint8_t port)
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130 {
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131 //process events so controller state is as fresh as possible
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132 system_poll_events();
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133 console *system = context->system;
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134 return controller_read(&system->pads, port - PORT_CONTROLLER_1);
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135 }
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136
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137 uint32_t next_interrupt_cycle(cpu *context, uint8_t mask)
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138 {
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139 console *system = context->system;
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140 uint32_t next = 0xFFFFFFFF;
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parents: 24
diff changeset
141 if (mask & 1) {
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
142 timer_run(&system->timer, context->cycles);
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
143 next = timer_next_interrupt(&system->timer);
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
144 }
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
145 if (mask & 2) {
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
146 vdp_run(&system->video, context->cycles);
26
083347ccd508 Implemented vblank interrupts and fixed a bug in exception vector address calculation
Michael Pavone <pavone@retrodev.com>
parents: 25
diff changeset
147 uint32_t vnext = vdp_next_interrupt(&system->video);
083347ccd508 Implemented vblank interrupts and fixed a bug in exception vector address calculation
Michael Pavone <pavone@retrodev.com>
parents: 25
diff changeset
148 if (vnext < next) {
083347ccd508 Implemented vblank interrupts and fixed a bug in exception vector address calculation
Michael Pavone <pavone@retrodev.com>
parents: 25
diff changeset
149 next = vnext;
083347ccd508 Implemented vblank interrupts and fixed a bug in exception vector address calculation
Michael Pavone <pavone@retrodev.com>
parents: 25
diff changeset
150 }
25
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
151 }
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
152 return next;
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
153 }
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
154
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
155 uint8_t get_current_interrupts(cpu *context)
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
156 {
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
157 console *system = context->system;
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
158 timer_run(&system->timer, context->cycles);
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
159 uint8_t bits = 0;
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
160 if (system->timer.pending) {
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
161 bits |= 1;
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
162 }
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
163 vdp_run(&system->video, context->cycles);
26
083347ccd508 Implemented vblank interrupts and fixed a bug in exception vector address calculation
Michael Pavone <pavone@retrodev.com>
parents: 25
diff changeset
164 if (vdp_interrupt_pending(&system->video)) {
083347ccd508 Implemented vblank interrupts and fixed a bug in exception vector address calculation
Michael Pavone <pavone@retrodev.com>
parents: 25
diff changeset
165 bits |= 2;
083347ccd508 Implemented vblank interrupts and fixed a bug in exception vector address calculation
Michael Pavone <pavone@retrodev.com>
parents: 25
diff changeset
166 }
25
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
167 return bits;
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
168 }
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
169
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
170 void ack_interrupt(cpu *context, int which)
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
171 {
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
172 console *system = context->system;
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
173 if (which == 0) {
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
174 timer_run(&system->timer, context->cycles);
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
175 system->timer.pending = 0;
26
083347ccd508 Implemented vblank interrupts and fixed a bug in exception vector address calculation
Michael Pavone <pavone@retrodev.com>
parents: 25
diff changeset
176 } else {
083347ccd508 Implemented vblank interrupts and fixed a bug in exception vector address calculation
Michael Pavone <pavone@retrodev.com>
parents: 25
diff changeset
177 vdp_ack_interrupt(&system->video);
25
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
178 }
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
179 }
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
180
0
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
181 memory_region regions[] = {
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
182 {rom, 0, sizeof(rom)-1, MEM_READ},
30
78068060313a Fixed memory flags on RAM
Michael Pavone <pavone@retrodev.com>
parents: 28
diff changeset
183 {ram, sizeof(rom), sizeof(rom)-1+sizeof(ram), MEM_READ|MEM_WRITE},
0
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
184 };
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
185
8
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
186 void run_console(console *context)
0
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
187 {
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
188 for(;;)
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
189 {
8
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
190 run_cpu(context->proc, CYCLES_PER_FRAME);
24
4c9dbfa30a66 Implemented audio
Michael Pavone <pavone@retrodev.com>
parents: 19
diff changeset
191 audio_run(context->audio, CYCLES_PER_FRAME);
8
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
192 vdp_run(&context->video, CYCLES_PER_FRAME);
25
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
193 timer_run(&context->timer, CYCLES_PER_FRAME);
8
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
194 context->proc->cycles -= CYCLES_PER_FRAME;
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
195 context->video.cycles -= CYCLES_PER_FRAME;
24
4c9dbfa30a66 Implemented audio
Michael Pavone <pavone@retrodev.com>
parents: 19
diff changeset
196 context->audio->cycles -= CYCLES_PER_FRAME;
25
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
197 context->timer.cycles -= CYCLES_PER_FRAME;
16
ae58e7c3c328 Poll events regularly to avoid unresponsive app warnings. Handle quit event
Michael Pavone <pavone@retrodev.com>
parents: 11
diff changeset
198 system_poll_events();
0
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
199 }
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
200 }
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
201
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
202 int main(int argc, char **argv)
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
203 {
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
204 if (argc < 2) {
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
205 fputs("usage: s16 FILE\n", stderr);
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
206 return 1;
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
207 }
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
208 FILE *f = fopen(argv[1], "rb");
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
209 if (!f) {
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
210 fprintf(stderr, "Failed to open %s for reading\n", argv[1]);
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
211 return 1;
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
212 }
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
213
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
214 size_t read;
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
215 if ((read = fread(rom, 1, sizeof(rom), f)) < sizeof(rom)) {
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
216 memset(rom + read, 0xFF, sizeof(rom)-read);
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
217 }
8
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
218 console context;
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
219 context.proc = alloc_cpu(10, sizeof(regions)/sizeof(memory_region), regions);
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
220 context.proc->system = &context;
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
221 vdp_init(&context.video, 2);
25
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
222 timer_init(&context.timer, 16);
28
c677507682e3 Untested controller implementation
Michael Pavone <pavone@retrodev.com>
parents: 26
diff changeset
223 context.proc->port_handlers[PORT_CONTROLLER_1].read = controller_port_read;
c677507682e3 Untested controller implementation
Michael Pavone <pavone@retrodev.com>
parents: 26
diff changeset
224 context.proc->port_handlers[PORT_CONTROLLER_2].read = controller_port_read;
24
4c9dbfa30a66 Implemented audio
Michael Pavone <pavone@retrodev.com>
parents: 19
diff changeset
225 context.proc->port_handlers[PORT_FREQUENCY_A].write = frequency_port_write;
4c9dbfa30a66 Implemented audio
Michael Pavone <pavone@retrodev.com>
parents: 19
diff changeset
226 context.proc->port_handlers[PORT_FREQUENCY_B].write = frequency_port_write;
4c9dbfa30a66 Implemented audio
Michael Pavone <pavone@retrodev.com>
parents: 19
diff changeset
227 context.proc->port_handlers[PORT_FREQUENCY_C].write = frequency_port_write;
4c9dbfa30a66 Implemented audio
Michael Pavone <pavone@retrodev.com>
parents: 19
diff changeset
228 context.proc->port_handlers[PORT_FREQUENCY_D].write = frequency_port_write;
4c9dbfa30a66 Implemented audio
Michael Pavone <pavone@retrodev.com>
parents: 19
diff changeset
229 context.proc->port_handlers[PORT_VOLUME_AB].write = volume_port_write;
4c9dbfa30a66 Implemented audio
Michael Pavone <pavone@retrodev.com>
parents: 19
diff changeset
230 context.proc->port_handlers[PORT_VOLUME_CD].write = volume_port_write;
25
fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file
Michael Pavone <pavone@retrodev.com>
parents: 24
diff changeset
231 context.proc->port_handlers[PORT_TIMER].write = timer_port_write;
8
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
232 context.proc->port_handlers[PORT_SERIAL].write = debug_port_write;
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
233 context.proc->port_handlers[PORT_SERIAL].read = debug_port_read;
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
234 context.proc->port_handlers[PORT_VERTICAL].write = vertical_port_write;
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
235 context.proc->port_handlers[PORT_VERTICAL].read = vertical_port_read;
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
236 context.proc->port_handlers[PORT_HORIZONTAL].write = horizontal_port_write;
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
237 context.proc->port_handlers[PORT_HORIZONTAL].read = horizontal_port_read;
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
238 context.proc->port_handlers[PORT_VRAM_ADDRESS].write = address_port_write;
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
239 context.proc->port_handlers[PORT_VRAM_ADDRESS].read = address_port_read;
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
240 context.proc->port_handlers[PORT_VRAM_DATA].write = data_port_write;
11
04d8efe7a1f0 Initial stab at video output and background color rendering. Fixed address decoding in address port write handler.
Michael Pavone <pavone@retrodev.com>
parents: 8
diff changeset
241
24
4c9dbfa30a66 Implemented audio
Michael Pavone <pavone@retrodev.com>
parents: 19
diff changeset
242 if (!system_init(640, 480, 48000)) {
11
04d8efe7a1f0 Initial stab at video output and background color rendering. Fixed address decoding in address port write handler.
Michael Pavone <pavone@retrodev.com>
parents: 8
diff changeset
243 return 1;
04d8efe7a1f0 Initial stab at video output and background color rendering. Fixed address decoding in address port write handler.
Michael Pavone <pavone@retrodev.com>
parents: 8
diff changeset
244 }
04d8efe7a1f0 Initial stab at video output and background color rendering. Fixed address decoding in address port write handler.
Michael Pavone <pavone@retrodev.com>
parents: 8
diff changeset
245
24
4c9dbfa30a66 Implemented audio
Michael Pavone <pavone@retrodev.com>
parents: 19
diff changeset
246 context.audio = alloc_audio(MASTER_CLOCK, 17, system_sample_rate(), system_buffer_size());
4c9dbfa30a66 Implemented audio
Michael Pavone <pavone@retrodev.com>
parents: 19
diff changeset
247
8
5176efdda5ae Initial work on VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 0
diff changeset
248 run_console(&context);
0
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
249 return 0;
7e44f7d5810b Initial commit. CPU working well enough for simple hello world program.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
250 }