149 lines
3.9 KiB
C
149 lines
3.9 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 <SFML/System.h>
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#include <SFML/Graphics.h>
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#include <SFML/Window.h>
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#include "config.h"
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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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sfVertexArray *renderArray;
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sfRenderWindow *window;
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sfFont *font;
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sfText *renderText;
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sfRenderStates renderStates;
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sfRectangleShape *haltRect;
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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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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 updateRenderStates(){
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renderStates.transform = sfTransform_Identity;
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sfTransform_scale(&renderStates.transform, displayscale, displayscale);
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}
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void drawScreen(){
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sfRenderWindow_drawVertexArray(window, renderArray, &renderStates);
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if (halt){
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sfRenderWindow_drawRectangleShape(window, haltRect, &renderStates);
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}
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if (showHelp){
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sfText_setString(renderText, HELPKEYS);
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sfRenderWindow_drawText(window, renderText, &renderStates);
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}
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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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window = sfRenderWindow_create((sfVideoMode){800, 600, 24}, "LS7 Emulator", sfResize | sfClose, NULL);
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sfRenderWindow_setVerticalSyncEnabled(window, sfFalse);
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sfRenderWindow_setFramerateLimit(window, FPS);
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sfRenderWindow_setKeyRepeatEnabled(window, sfFalse);
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font = sfFont_createFromFile("bin/font.ttf");
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renderText = sfText_create();
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sfText_setPosition(renderText, (sfVector2f){ 50, 50 });
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sfText_setFont(renderText, font);
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sfText_setCharacterSize(renderText, 10);
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sfText_setFillColor(renderText, sfWhite);
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sfText_setOutlineColor(renderText, sfBlack);
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sfText_setOutlineThickness(renderText, 1);
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haltRect = sfRectangleShape_create();
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sfRectangleShape_setFillColor(haltRect, (sfColor){ 0, 0, 0, 128 });
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sfRectangleShape_setSize(haltRect, (sfVector2f){ 384, 256 });
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renderStates = sfRenderStates_default();
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sfTransform_scale(&renderStates.transform, displayscale, displayscale);
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resetSystem();
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while (sfRenderWindow_isOpen(window)){
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pollEvents(window);
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if (!singlestep && !halt){
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for (int i = 0; i < cpuspeed / FPS; i++) step6502();
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irq6502();
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}
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sfRenderWindow_clear(window, BACKCOLOR);
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updateVideo();
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drawScreen();
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sfRenderWindow_display(window);
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}
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sfRenderWindow_destroy(window);
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return EXIT_SUCCESS;
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}
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