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annotate blastcpm.c @ 1971:80920c21bb52

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Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
author Michael Pavone <pavone@retrodev.com>
date Fri, 08 May 2020 11:40:30 -0700
parents 95e36a227c9d
children 8fe162bdb038 a66916828c9b
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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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14
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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 += context->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, 0, 0, MMAP_READ | MMAP_WRITE | MMAP_CODE, ram, NULL, NULL, NULL, NULL},
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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, 0, 0, 0, NULL, NULL, NULL, console_read, console_write},
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87 { 0x1, 0x2, 0xFFFF, 0, 0, 0, NULL, NULL, NULL, console_status_read, console_flush_write},
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88 { 0x2, 0x3, 0xFFFF, 0, 0, 0, NULL, NULL, NULL, NULL, 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 }