GB, GBA: Automatic BIOS detection

CHANGES

@@ -12,6 +12,7 @@ Features:
  - 3DS: Adjustable screen darkening
  - Ability to temporarily load a savegame
  - Load specific files out of archives
+ - Automatic BIOS detection
 Bugfixes:
  - SDL: Fix axes being mapped wrong
  - GBA Memory: Fix mirror on non-overdumped Classic NES games

src/gb/core.c

@@ -104,13 +104,6 @@ static void _GBCoreLoadConfig(struct mCore* core, const struct mCoreConfig* conf
 	gb->video.frameskip = core->opts.frameskip;
 
 #if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
-	struct VFile* bios = 0;
-	if (core->opts.useBios && core->opts.bios) {
-		bios = VFileOpen(core->opts.bios, O_RDONLY);
-	}
-	if (bios) {
-		GBLoadBIOS(gb, bios);
-	}
 	struct GBCore* gbcore = (struct GBCore*) core;
 	gbcore->overrides = mCoreConfigGetOverridesConst(config);
 #endif
@@ -216,6 +209,35 @@ static void _GBCoreReset(struct mCore* core) {
 		}
 	}
 
+#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
+	struct VFile* bios = 0;
+	if (core->opts.useBios) {
+		if (!core->opts.bios) {
+			char path[PATH_MAX];
+			GBDetectModel(gb);
+			mCoreConfigDirectory(path, PATH_MAX);
+			switch (gb->model) {
+			case GB_MODEL_DMG:
+			case GB_MODEL_SGB: // TODO
+				strncat(path, PATH_SEP "gb_bios.bin", PATH_MAX - strlen(path));
+				break;
+			case GB_MODEL_CGB:
+			case GB_MODEL_AGB:
+				strncat(path, PATH_SEP "gbc_bios.bin", PATH_MAX - strlen(path));
+				break;
+			default:
+				break;
+			};
+			bios = VFileOpen(path, O_RDONLY);
+		} else {
+			bios = VFileOpen(core->opts.bios, O_RDONLY);
+		}
+	}
+	if (bios) {
+		GBLoadBIOS(gb, bios);
+	}
+#endif
+
 	LR35902Reset(core->cpu);
 }
 

src/gb/gb.c

@@ -59,6 +59,8 @@ static void GBInit(void* cpu, struct mCPUComponent* component) {
 
 	gb->timer.p = gb;
 
+	gb->model = GB_MODEL_AUTODETECT;
+
 	gb->biosVf = 0;
 	gb->romVf = 0;
 	gb->sramVf = 0;

src/gba/core.c

@@ -118,14 +118,6 @@ static void _GBACoreLoadConfig(struct mCore* core, const struct mCoreConfig* con
 #if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 	struct GBACore* gbacore = (struct GBACore*) core;
 	gbacore->overrides = mCoreConfigGetOverridesConst(config);
-
-	struct VFile* bios = 0;
-	if (core->opts.useBios && core->opts.bios) {
-		bios = VFileOpen(core->opts.bios, O_RDONLY);
-	}
-	if (bios) {
-		GBALoadBIOS(gba, bios);
-	}
 #endif
 
 	const char* idleOptimization = mCoreConfigGetValue(config, "idleOptimization");
@@ -247,10 +239,6 @@ static void _GBACoreReset(struct mCore* core) {
 #endif
 		GBAVideoAssociateRenderer(&gba->video, renderer);
 	}
-	ARMReset(core->cpu);
-	if (core->opts.skipBios && gba->pristineRom) {
-		GBASkipBIOS(core->board);
-	}
 
 	struct GBACartridgeOverride override;
 	const struct GBACartridge* cart = (const struct GBACartridge*) gba->memory.rom;
@@ -260,6 +248,28 @@ static void _GBACoreReset(struct mCore* core) {
 			GBAOverrideApply(gba, &override);
 		}
 	}
+
+#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
+	struct VFile* bios = 0;
+	if (core->opts.useBios) {
+		if (!core->opts.bios) {
+			char path[PATH_MAX];
+			mCoreConfigDirectory(path, PATH_MAX);
+			strncat(path, PATH_SEP "gba_bios.bin", PATH_MAX - strlen(path));
+			bios = VFileOpen(path, O_RDONLY);
+		} else {
+			bios = VFileOpen(core->opts.bios, O_RDONLY);
+		}
+	}
+	if (bios) {
+		GBALoadBIOS(gba, bios);
+	}
+#endif
+
+	ARMReset(core->cpu);
+	if (core->opts.skipBios && gba->pristineRom) {
+		GBASkipBIOS(core->board);
+	}
 }
 
 static void _GBACoreRunFrame(struct mCore* core) {