148 lines
3.6 KiB
C
148 lines
3.6 KiB
C
#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <time.h>
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#include <string.h>
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#include <SDL2/SDL.h>
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#include "config.h"
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/* Preset Values */
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static float displayScale = 2;
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static int cpuSpeed = 100000; // 100 kHz
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static int singleStep = 0;
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static int clockSteps = 1;
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#include "sdlinit.c"
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#include "events.c"
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#include "cpu.c"
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#include "memory.c"
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#include "video.c"
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#include "keyboard.c"
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//#include "via.c"
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uint8_t halt = 0;
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uint8_t showHelp = 0;
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uint8_t showDebug = 0;
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uint8_t fpsCount = 0;
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uint8_t fpsStore;
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uint8_t cpuHealth;
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unsigned long cpuTicks = 0;
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unsigned long tickTrigger = 0;
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unsigned long renderTrigger = 0;
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char debugString[255];
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int openFile(const char *inputFile){
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FILE *file = fopen(inputFile, "rb");
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int retCode = 0;
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if (file != NULL){
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fseek(file, 0, SEEK_END);
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long filelen = ftell(file);
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rewind(file);
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if (fread(rom, filelen, 1, file) != 1) retCode = 1;
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} else retCode = 1;
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fclose(file);
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return retCode;
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}
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void resetSystem(){
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initVideo();
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updateVideo();
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reset6502();
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}
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void writeHelp(int type){
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if (!type) printf(HELP);
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else printf(HELPKEYS);
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exit(EXIT_SUCCESS);
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}
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void writePreamble() {
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printf(PREAMBLE);
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}
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void fetchArgs(int argc, char *argv[]){
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writePreamble();
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for (int i = 1; i < argc; i++) {
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if (!strcmp(argv[i], "--help")) writeHelp(0);
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else if (!strcmp(argv[i], "--help-keys")) writeHelp(1);
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else if (!strcmp(argv[i], "--cpuspeed")) cpuSpeed = atoi(argv[++i]);
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else if (!strcmp(argv[i], "--scale")) displayScale = atof(argv[++i]);
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else if (!strcmp(argv[i], "--singlestep")) singleStep = 1;
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else if (!strcmp(argv[i], "--clocksteps")) clockSteps = atoi(argv[++i]);
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//else if (!strcmp(argv[i], "--snapshot")) snapshotFile = &argv[i];
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else {
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if (openFile(argv[i])){
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printf("Unknown parameter or file '%s'\nTry '--help' for help\n", argv[i]);
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exit(EXIT_FAILURE);
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}
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}
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}
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}
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int main(int argc, char *argv[]){
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fetchArgs(argc, argv);
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initWindow();
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clearScreen(renderMemory, 0x000000FF);
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resetSystem();
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while (1){
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SDL_Delay(32);
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pollEvents();
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fpsCount++;
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updateVideo();
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if (!singleStep && !halt){
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for (int i = 0; i < (cpuSpeed / FPS) * 2; i++) {
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step6502();
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cpuTicks++;
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}
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irq6502();
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}
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if ((unsigned)time(NULL) != tickTrigger){
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tickTrigger = (unsigned)time(NULL);
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cpuHealth = (uint8_t)((cpuTicks / (float)cpuSpeed) * 100.);
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cpuTicks = 0;
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fpsStore = fpsCount;
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fpsCount = 0;
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}
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/* Redraw entire screen every X seconds */
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//if ((unsigned)time(NULL) > renderTrigger + 0){
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renderTrigger = (unsigned)time(NULL);
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if (SDL_UpdateTexture(texture, NULL, renderMemory, (sizeof(uint32_t) * SDL_X_SIZE))) {
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fprintf(stderr, "Could not update SDL texture: %s.\n", SDL_GetError());
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exit(EXIT_FAILURE);
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}
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if (SDL_RenderCopy(renderer, texture, NULL, NULL)) {
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fprintf(stderr, "Could not display SDL texture: %s.\n", SDL_GetError());
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exit(EXIT_FAILURE);
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}
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SDL_RenderPresent(renderer);
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//}
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}
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return EXIT_SUCCESS;
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}
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