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Kinda hacky fix to make sure Nuklear has the right GL context
author Michael Pavone <pavone@retrodev.com>
date Wed, 17 Apr 2024 22:18:45 -0700
parents a66916828c9b
children
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rev   line source
820
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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <stddef.h>
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4 #include <string.h>
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5 #include <time.h>
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6 #include <sys/select.h>
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7
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8 #ifdef NEW_CORE
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9 #include "z80.h"
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10 #else
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11 #include "z80_to_x86.h"
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12 #endif
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13 #include "util.h"
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15 uint8_t ram[64 * 1024];
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17 #define START_OFF 0x100
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18 #define OS_START 0xE400
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19 #define OS_RESET 0xE403
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20 int headless = 1;
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21
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22 #ifndef NEW_CORE
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23 void z80_next_int_pulse(z80_context * context)
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24 {
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25 context->int_pulse_start = context->int_pulse_end = CYCLE_NEVER;
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26 }
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27 #endif
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29 void render_errorbox(char *title, char *message)
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30 {
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31 }
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33 void render_infobox(char *title, char *message)
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34 {
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35 }
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37 void *console_write(uint32_t address, void *context, uint8_t value)
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38 {
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39 putchar(value);
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40 return context;
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41 }
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43 uint8_t console_read(uint32_t address, void *context)
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44 {
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45 return getchar();
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46 }
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47
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48 void *console_flush_write(uint32_t address, void *context, uint8_t value)
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49 {
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50 fflush(stdout);
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51 return context;
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52 }
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53
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54 uint8_t console_status_read(uint32_t address, void *context)
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55 {
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56 fd_set read_fds;
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57 FD_ZERO(&read_fds);
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58 struct timeval timeout;
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59 timeout.tv_sec = 0;
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60 timeout.tv_usec = 0;
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61 FD_SET(fileno(stdin), &read_fds);
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62 return select(fileno(stdin)+1, &read_fds, NULL, NULL, &timeout) > 0;
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63 }
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64
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65 time_t start;
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66 uint64_t total_cycles;
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67 void *exit_write(uint32_t address, void *context, uint8_t value)
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68 {
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69 time_t duration = time(NULL) - start;
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70 z80_context *z80 = context;
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71 #ifdef NEW_CORE
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72 total_cycles += z80->cycles;
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73 #else
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74 total_cycles += z80->current_cycle;
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75 #endif
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76 printf("Effective clock speed: %f MHz\n", ((double)total_cycles) / (1000000.0 * duration));
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77 exit(0);
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78 return context;
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79 }
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80
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81 const memmap_chunk z80_map[] = {
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82 { 0x0000, 0x10000, 0xFFFF, .flags = MMAP_READ | MMAP_WRITE | MMAP_CODE, .buffer = ram},
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83 };
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84
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85 memmap_chunk io_map[] = {
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86 { 0x0, 0x1, 0xFFFF, .read_8 = console_read, .write_8 = console_write},
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87 { 0x1, 0x2, 0xFFFF, .read_8 = console_status_read, .write_8 = console_flush_write},
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88 { 0x2, 0x3, 0xFFFF, .write_8 = exit_write},
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89 };
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90
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91 int main(int argc, char **argv)
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92 {
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93 FILE *f = fopen("fake_cpm.bin", "rb");
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94 long fsize = file_size(f);
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95 if (fsize > sizeof(ram) - OS_START) {
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96 fsize = sizeof(ram) - OS_START;
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97 }
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98 if (fread(ram + OS_START, 1, fsize, f) != fsize) {
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99 fprintf(stderr, "Error reading from fake_cpm.bin\n");
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100 exit(1);
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101 }
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102 f = fopen(argv[1], "rb");
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103 fsize = file_size(f);
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104 if (fsize > OS_START - START_OFF) {
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105 fsize = OS_START - START_OFF;
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106 }
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107 if (fread(ram + START_OFF, 1, fsize, f) != fsize) {
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108 fprintf(stderr, "Error reading from file %s\n", argv[1]);
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109 exit(1);
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110 }
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111 fclose(f);
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112 ram[0] = 0xC3;
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113 ram[1] = OS_RESET & 0xFF;
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114 ram[2] = OS_RESET >> 8;
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115 ram[5] = 0xC3;
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116 ram[6] = OS_START & 0xFF;
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117 ram[7] = OS_START >> 8;
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118
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119 z80_options opts;
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120 z80_context *context;
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121 init_z80_opts(&opts, z80_map, 1, io_map, 3, 1, 0xFF);
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122 context = init_z80_context(&opts);
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123 start = time(NULL);
820
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124 for(;;)
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125 {
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126 #ifdef NEW_CORE
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127 z80_execute(context, 1000000);
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128 total_cycles += context->cycles;
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129 context->cycles = 0;
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130 #else
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131 z80_run(context, 1000000);
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132 total_cycles += context->current_cycle;
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133 context->current_cycle = 0;
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134 #endif
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135
820
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136 }
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137 return 0;
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138 }