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1 nishi 1 
/* $Id: main.c 34 2024-09-01 10:13:47Z nishi $ */
2 
 
3 
#include <stdio.h>
4 
#include <stdbool.h>
5 
#include <sys/stat.h>
6 
#include <stdlib.h>
7 
#include <string.h>
8 
 
9 
#include <raylib.h>
10 
 
11 
#include "shiroi.h"
12 
 
12 nishi 13 
#define ON_COLOR ((Color){0xc0, 0, 0, 0xff})
14 
#define OFF_COLOR ((Color){0x20, 0x20, 0x20, 0xff})
15 
 
1 nishi 16 
shiroi_t shiroi;
17 
 
18 
void thread_start(void);
19 
void thread_end(void);
20 
 
12 nishi 21 
bool get_bit(int n, int f) { return (n & (1 << f)) ? true : false; }
22 
 
1 nishi 23 
int main(int argc, char** argv) {
24 
	FILE* fconf = fopen("shiroi.ini", "r");
25 
	if(fconf == NULL) {
26 
		printf("Creating config.\n");
27 
		fconf = fopen("shiroi.ini", "w");
28 
		if(fconf == NULL) {
29 
			fprintf(stderr, "Failed to create config\n");
30 
			return 1;
31 
		}
32 
		fprintf(fconf, "slot1=video_mark_1\n");
33 
		fprintf(fconf, "slot2=sound_mark_1\n");
34 
		fprintf(fconf, "slot3=math_mark_1\n");
3 nishi 35 
		fprintf(fconf, "slot4=text_mark_1\n");
1 nishi 36 
		fprintf(fconf, "rom=shiroi.rom\n");
37 
		fclose(fconf);
38 
	}
39 
 
40 
	shiroi_init_cards(&shiroi);
41 
 
42 
	fconf = fopen("shiroi.ini", "r");
43 
 
44 
	struct stat s;
45 
	stat("shiroi.ini", &s);
46 
 
47 
	char* ini = malloc(s.st_size + 1);
48 
	fread(ini, s.st_size, 1, fconf);
49 
 
50 
	ini[s.st_size] = 0;
51 
 
52 
	fclose(fconf);
53 
 
54 
	int incr = 0;
55 
	int i;
56 
	for(i = 0;; i++) {
57 
		if(ini[i] == 0 || ini[i] == '\n') {
58 
			char oldc = ini[i];
59 
			ini[i] = 0;
60 
 
61 
			char* line = ini + incr;
62 
 
3 nishi 63 
			if(strlen(line) != 0 && line[0] != '#') {
1 nishi 64 
				int j;
65 
				for(j = 0; line[j] != 0; j++) {
66 
					if(line[j] == '=') {
67 
						line[j] = 0;
68 
						if(strcmp(line, "rom") == 0) {
69 
							printf("ROM: %s\n", line + j + 1);
70 
							if(stat(line + j + 1, &s) != 0) {
71 
								fprintf(stderr, "ROM not found\n");
72 
								free(ini);
73 
								return 1;
74 
							}
75 
							printf("ROM size: %d\n", s.st_size);
76 
							FILE* f = fopen(line + j + 1, "rb");
77 
							fread(shiroi.ram, s.st_size, 1, f);
78 
							fclose(f);
34 nishi 79 
						} else if(strcmp(line, "romcard") == 0) {
80 
							printf("ROMcard: %s\n", line + j + 1);
81 
							if(stat(line + j + 1, &s) != 0) {
82 
								fprintf(stderr, "ROM not found\n");
83 
								free(ini);
84 
								return 1;
85 
							}
86 
							printf("ROMcard size: %d\n", s.st_size);
87 
							shiroi_card_t* card = shiroi_get_romcard_card(&shiroi);
88 
							if(card != NULL) {
89 
								FILE* f = fopen(line + j + 1, "rb");
90 
								fread(card->romcard.data, s.st_size, 1, f);
91 
								fclose(f);
92 
							} else {
93 
								fprintf(stderr, "ROMcard is not installed ; ignored\n");
94 
							}
1 nishi 95 
						} else if(line[0] == 's' && line[1] == 'l' && line[2] == 'o' && line[3] == 't') {
96 
							int slot = atoi(line + 4);
97 
							const char* n = "";
98 
							int dev = -1;
99 
							if(strcmp(line + j + 1, "video_mark_1") == 0) {
100 
								dev = SHIROI_VIDEO_MARK_I;
101 
								n = "Video Mark I";
7 nishi 102 
							} else if(strcmp(line + j + 1, "video_mark_2") == 0) {
103 
								dev = SHIROI_VIDEO_MARK_II;
104 
								n = "Video Mark II";
1 nishi 105 
							} else if(strcmp(line + j + 1, "sound_mark_1") == 0) {
106 
								dev = SHIROI_SOUND_MARK_I;
107 
								n = "Sound Mark I";
108 
							} else if(strcmp(line + j + 1, "math_mark_1") == 0) {
109 
								dev = SHIROI_MATH_MARK_I;
110 
								n = "Math Mark I";
3 nishi 111 
							} else if(strcmp(line + j + 1, "text_mark_1") == 0) {
112 
								dev = SHIROI_TEXT_MARK_I;
113 
								n = "Text Mark I";
12 nishi 114 
							} else if(strcmp(line + j + 1, "debug") == 0) {
115 
								dev = SHIROI_DEBUG;
116 
								n = "Debug";
34 nishi 117 
							} else if(strcmp(line + j + 1, "romcard_mark_1") == 0) {
118 
								dev = SHIROI_ROMCARD_MARK_I;
119 
								n = "ROMcard Mark I";
1 nishi 120 
							}
121 
							if(dev == -1) {
122 
								fprintf(stderr, "No such device called `%s' ; ignoring\n", line + j + 1);
123 
							} else {
124 
								shiroi_install(&shiroi, slot, dev);
125 
								printf("Installed `%s' into slot %d\n", n, slot);
126 
							}
127 
						}
128 
						break;
129 
					}
130 
				}
131 
			}
132 
 
133 
			incr = i + 1;
134 
			if(oldc == 0) break;
135 
		}
136 
	}
137 
 
138 
	free(ini);
139 
 
140 
	shiroi_init(&shiroi);
141 
 
142 
	double scx = 2;
143 
	double scy = 2;
144 
 
145 
	shiroi_card_t* videocard = shiroi_get_video_card(&shiroi);
146 
	shiroi_video_t* video = NULL;
147 
	if(videocard != NULL) {
148 
		video = videocard->videoptr;
149 
	}
12 nishi 150 
 
3 nishi 151 
	shiroi_card_t* textcard = shiroi_get_text_card(&shiroi);
152 
	shiroi_text_t* text = NULL;
153 
	if(textcard != NULL) {
154 
		text = textcard->textptr;
155 
	}
1 nishi 156 
 
12 nishi 157 
	shiroi_card_t* debugcard = shiroi_get_debug_card(&shiroi);
158 
	shiroi_debug_t* debug = NULL;
159 
	if(debugcard != NULL) {
160 
		debug = debugcard->debugptr;
161 
	}
162 
 
1 nishi 163 
	SetTraceLogLevel(LOG_NONE);
164 
	if(video != NULL) {
13 nishi 165 
		InitWindow(video->width * scx + ((debug == NULL && text == NULL) ? 0 : 200), video->height * scy, "Shiroi Emulator");
1 nishi 166 
	} else {
13 nishi 167 
		InitWindow(640 + ((debug == NULL && text == NULL) ? 0 : 200), 480, "Shiroi Emulator");
1 nishi 168 
	}
169 
	InitAudioDevice();
170 
	SetAudioStreamBufferSizeDefault(512);
171 
	AudioStream as = LoadAudioStream(48000, 16, 1);
172 
	SetAudioStreamCallback(as, shiroi.play_audio);
173 
	SetTargetFPS(60);
174 
	uint32_t* fb = NULL;
175 
 
176 
	if(video != NULL) {
177 
		fb = malloc(sizeof(*fb) * video->width * video->height);
178 
 
179 
		int x, y;
180 
		for(y = 0; y < video->height; y++) {
181 
			for(x = 0; x < video->width; x++) {
182 
				fb[y * video->width + x] = 0xffffff;
183 
			}
184 
		}
185 
	}
186 
 
187 
	RenderTexture r;
12 nishi 188 
	if(video != NULL) {
189 
		r = LoadRenderTexture(video->width, video->height);
190 
		BeginTextureMode(r);
191 
		ClearBackground(BLACK);
192 
		EndTextureMode();
193 
	}
1 nishi 194 
	PlayAudioStream(as);
195 
	thread_start();
196 
	while(!WindowShouldClose()) {
197 
		BeginDrawing();
198 
 
199 
		ClearBackground(BLACK);
200 
 
3 nishi 201 
		if(text != NULL) {
4 nishi 202 
			/*
203 
			 * / 1 2 3 4 5 6 7 8 9 10 11 12 13
7 nishi 204 
			 * 1 1 2 3 4 5 6 7 8 9 0  -  =  bs
4 nishi 205 
			 * 2 q w e r t y u i o p  [  ]  rt
206 
			 * 3 a s d f g h j k l ;  '  \  cl
20 nishi 207 
			 * 4 z x c v b n m , . /  sp bk
4 nishi 208 
			 */
209 
			int c = GetKeyPressed();
7 nishi 210 
			if(KEY_ONE <= c && c <= KEY_NINE) {
4 nishi 211 
				text->key = (1 << 4) | (c - KEY_ONE + 1);
5 nishi 212 
			} else if(c == KEY_ZERO) {
4 nishi 213 
				text->key = (1 << 4) | 10;
5 nishi 214 
			} else if(c == KEY_MINUS) {
4 nishi 215 
				text->key = (1 << 4) | 11;
5 nishi 216 
			} else if(c == KEY_EQUAL) {
4 nishi 217 
				text->key = (1 << 4) | 12;
7 nishi 218 
			} else if(c == KEY_BACKSPACE) {
219 
				text->key = (1 << 4) | 13;
5 nishi 220 
			} else if(c == KEY_LEFT_BRACKET) {
4 nishi 221 
				text->key = (2 << 4) | 11;
5 nishi 222 
			} else if(c == KEY_RIGHT_BRACKET) {
4 nishi 223 
				text->key = (2 << 4) | 12;
5 nishi 224 
			} else if(c == KEY_ENTER) {
4 nishi 225 
				text->key = (2 << 4) | 13;
5 nishi 226 
			} else if(c == KEY_SEMICOLON) {
4 nishi 227 
				text->key = (3 << 4) | 10;
5 nishi 228 
			} else if(c == KEY_APOSTROPHE) {
4 nishi 229 
				text->key = (3 << 4) | 11;
5 nishi 230 
			} else if(c == KEY_BACKSLASH) {
4 nishi 231 
				text->key = (3 << 4) | 12;
5 nishi 232 
			} else if(c == KEY_LEFT_SHIFT || c == KEY_RIGHT_SHIFT) {
4 nishi 233 
				text->key = (3 << 4) | 13;
6 nishi 234 
				text->caps = !text->caps;
11 nishi 235 
			} else if(c == KEY_F1) {
236 
				if(shiroi.stop) {
237 
					shiroi.stop = false;
238 
					shiroi.reset = true;
239 
					thread_start();
240 
				} else {
241 
					shiroi.reset = true;
242 
					shiroi.stop = true;
243 
					thread_end();
244 
				}
10 nishi 245 
			} else if(c == KEY_F2) {
246 
				shiroi.reset = true;
5 nishi 247 
			} else if(c == KEY_COMMA) {
4 nishi 248 
				text->key = (4 << 4) | 8;
5 nishi 249 
			} else if(c == KEY_PERIOD) {
4 nishi 250 
				text->key = (4 << 4) | 9;
5 nishi 251 
			} else if(c == KEY_SLASH) {
4 nishi 252 
				text->key = (4 << 4) | 10;
5 nishi 253 
			} else if(c == KEY_SPACE) {
4 nishi 254 
				text->key = (4 << 4) | 11;
20 nishi 255 
			} else if((IsKeyDown(KEY_LEFT_CONTROL) || IsKeyDown(KEY_RIGHT_CONTROL)) && c == KEY_PAUSE) {
256 
				text->key = (4 << 4) | 12;
5 nishi 257 
			} else if(c == KEY_Q) {
4 nishi 258 
				text->key = (2 << 4) | 1;
5 nishi 259 
			} else if(c == KEY_W) {
4 nishi 260 
				text->key = (2 << 4) | 2;
5 nishi 261 
			} else if(c == KEY_E) {
4 nishi 262 
				text->key = (2 << 4) | 3;
5 nishi 263 
			} else if(c == KEY_R) {
4 nishi 264 
				text->key = (2 << 4) | 4;
5 nishi 265 
			} else if(c == KEY_T) {
4 nishi 266 
				text->key = (2 << 4) | 5;
5 nishi 267 
			} else if(c == KEY_Y) {
4 nishi 268 
				text->key = (2 << 4) | 6;
5 nishi 269 
			} else if(c == KEY_U) {
4 nishi 270 
				text->key = (2 << 4) | 7;
5 nishi 271 
			} else if(c == KEY_I) {
4 nishi 272 
				text->key = (2 << 4) | 8;
5 nishi 273 
			} else if(c == KEY_O) {
4 nishi 274 
				text->key = (2 << 4) | 9;
5 nishi 275 
			} else if(c == KEY_P) {
4 nishi 276 
				text->key = (2 << 4) | 10;
5 nishi 277 
			} else if(c == KEY_A) {
4 nishi 278 
				text->key = (3 << 4) | 1;
5 nishi 279 
			} else if(c == KEY_S) {
4 nishi 280 
				text->key = (3 << 4) | 2;
5 nishi 281 
			} else if(c == KEY_D) {
4 nishi 282 
				text->key = (3 << 4) | 3;
5 nishi 283 
			} else if(c == KEY_F) {
4 nishi 284 
				text->key = (3 << 4) | 4;
5 nishi 285 
			} else if(c == KEY_G) {
4 nishi 286 
				text->key = (3 << 4) | 5;
5 nishi 287 
			} else if(c == KEY_H) {
4 nishi 288 
				text->key = (3 << 4) | 6;
5 nishi 289 
			} else if(c == KEY_J) {
4 nishi 290 
				text->key = (3 << 4) | 7;
5 nishi 291 
			} else if(c == KEY_K) {
4 nishi 292 
				text->key = (3 << 4) | 8;
5 nishi 293 
			} else if(c == KEY_L) {
4 nishi 294 
				text->key = (3 << 4) | 9;
5 nishi 295 
			} else if(c == KEY_Z) {
4 nishi 296 
				text->key = (4 << 4) | 1;
5 nishi 297 
			} else if(c == KEY_X) {
4 nishi 298 
				text->key = (4 << 4) | 2;
5 nishi 299 
			} else if(c == KEY_C) {
4 nishi 300 
				text->key = (4 << 4) | 3;
5 nishi 301 
			} else if(c == KEY_V) {
4 nishi 302 
				text->key = (4 << 4) | 4;
5 nishi 303 
			} else if(c == KEY_B) {
4 nishi 304 
				text->key = (4 << 4) | 5;
5 nishi 305 
			} else if(c == KEY_N) {
4 nishi 306 
				text->key = (4 << 4) | 6;
5 nishi 307 
			} else if(c == KEY_M) {
4 nishi 308 
				text->key = (4 << 4) | 7;
309 
			}
3 nishi 310 
		}
311 
 
1 nishi 312 
		if(video != NULL) {
313 
			BeginTextureMode(r);
314 
 
315 
			int y, x;
316 
			for(y = 0; y < video->height; y++) {
317 
				for(x = 0; x < video->width; x++) {
7 nishi 318 
					if(video->fb[y * video->width + x] != fb[y * video->width + x]) {
1 nishi 319 
						uint32_t c = video->fb[y * video->width + x];
7 nishi 320 
						DrawPixel(x, y, (Color){(c >> 24) & 0xff, (c >> 16) & 0xff, (c >> 8) & 0xff, c & 0xff});
1 nishi 321 
						fb[y * video->width + x] = c;
322 
					}
323 
				}
324 
			}
325 
 
326 
			EndTextureMode();
327 
 
13 nishi 328 
			DrawTexturePro(r.texture, (Rectangle){0, 0, video->width, -video->height}, (Rectangle){(text == NULL && debug == NULL) ? 0 : 200, 0, GetScreenWidth() - ((text == NULL && debug == NULL) ? 0 : 200), GetScreenHeight()}, (Vector2){0, 0}, 0, WHITE);
1 nishi 329 
		} else {
13 nishi 330 
			DrawText("No Video", 200 + 5, 5, 20, WHITE);
1 nishi 331 
		}
332 
 
13 nishi 333 
		if(text != NULL) {
334 
			DrawText("Caps Lock", 5, 5, 10, WHITE);
6 nishi 335 
 
13 nishi 336 
			DrawCircle(200 - 10, 10, 5, text->caps ? ON_COLOR : OFF_COLOR);
337 
		}
6 nishi 338 
 
12 nishi 339 
		if(debug != NULL) {
340 
			DrawText("Debug", 5, 5 + 10 + 5, 10, WHITE);
341 
			for(i = 0; i < 4; i++) {
342 
				int shx = i * (5 + 20 + 5 + 5 + 10);
343 
				DrawRectangle(shx + 10, 5 + 5 + 10 + 5 + 10 + 5, 20, 5, get_bit(debug->latch[i], 0) ? ON_COLOR : OFF_COLOR);
344 
				DrawRectangle(shx + 5, 5 + 5 + 10 + 5 + 10 + 10, 5, 20, get_bit(debug->latch[i], 1) ? ON_COLOR : OFF_COLOR);
345 
				DrawRectangle(shx + 5 + 20 + 5, 5 + 5 + 10 + 5 + 10 + 10, 5, 20, get_bit(debug->latch[i], 2) ? ON_COLOR : OFF_COLOR);
346 
				DrawRectangle(shx + 10, 5 + 5 + 10 + 5 + 10 + 5 + 20 + 5, 20, 5, get_bit(debug->latch[i], 3) ? ON_COLOR : OFF_COLOR);
347 
				DrawRectangle(shx + 5, 5 + 5 + 10 + 5 + 10 + 10 + 5 + 20, 5, 20, get_bit(debug->latch[i], 4) ? ON_COLOR : OFF_COLOR);
348 
				DrawRectangle(shx + 5 + 20 + 5, 5 + 5 + 10 + 5 + 10 + 10 + 5 + 20, 5, 20, get_bit(debug->latch[i], 5) ? ON_COLOR : OFF_COLOR);
349 
				DrawRectangle(shx + 10, 5 + 5 + 10 + 5 + 10 + 5 + 20 + 5 + 20 + 5, 20, 5, get_bit(debug->latch[i], 6) ? ON_COLOR : OFF_COLOR);
350 
				DrawRectangle(shx + 5 + 5 + 20 + 5 + 5, 5 + 5 + 10 + 5 + 10 + 5 + 20 + 5 + 20 + 5, 5, 5, get_bit(debug->latch[i], 7) ? ON_COLOR : OFF_COLOR);
351 
			}
352 
		}
353 
 
1 nishi 354 
		EndDrawing();
355 
	}
356 
	CloseWindow();
357 
	UnloadAudioStream(as);
358 
	if(video != NULL) UnloadRenderTexture(r);
359 
	shiroi.stop = true;
360 
	thread_end();
361 
}