M CHANGES → CHANGES

@@ -17,6 +17,7 @@ - DS Memory: Ensure DS9 I/O is 8-byte aligned
  - ARM9: Implement SMLAW<y> and SMULW<y>
  - Qt: Add .nds files to the extension list in Info.plist
  - ARM9: Implement STRD/LDRD
+ - DS: Attempt to detect if a game is homebrew
 
 0.6.0: (Future)
 Features:

M include/mgba/internal/ds/ds.h → include/mgba/internal/ds/ds.h

@@ -123,6 +123,8 @@ struct mCoreCallbacksList coreCallbacks;
 
 	struct mTimingEvent divEvent;
 	struct mTimingEvent sqrtEvent;
+
+	bool isHomebrew;
 };
 
 struct DSCartridge {
@@ -158,6 +160,15 @@ uint32_t busKEY1Timing;
 	uint32_t iconOffset;
 	uint16_t secureAreaCrc16;
 	uint16_t secureAreaDelay;
+	uint32_t arm9Autoload;
+	uint32_t arm7Autoload;
+	uint8_t secureAreaDisable[8];
+	uint32_t usedSize;
+	uint32_t romHeaderSize;
+	uint8_t reserved2[56];
+	uint8_t logo[156];
+	uint16_t logoCrc16;
+	uint16_t headerCrc16;
 	// TODO: Fill in more
 	// And ROM data...
 };

M src/ds/ds.c → src/ds/ds.c

@@ -294,6 +294,7 @@ DSAudioReset(&ds->audio);
 	DS7IOInit(ds);
 
 	DSConfigureWRAM(&ds->memory, 3);
+	ds->isHomebrew = false;
 
 	struct DSCartridge* header = ds->romVf->map(ds->romVf, sizeof(*header), MAP_READ);
 	if (header) {
@@ -304,6 +305,9 @@ memcpy(&ds->memory.ram[0x3FFC04 >> 2], DS_CHIP_ID, 4);
 		ds->memory.ram[0x3FFC40 >> 2] = 1;
 		memcpy(&ds->memory.ram[0x3FFE00 >> 2], header, 0x170);
 		DS7IOWrite32(ds, DS_REG_ROMCNT_LO, header->busTiming | 0x2700000);
+
+		ds->isHomebrew = memcmp(&header->logoCrc16, DS_ROM_MAGIC, sizeof(header->logoCrc16));
+
 		// TODO: Error check
 		ds->romVf->seek(ds->romVf, header->arm7Offset, SEEK_SET);
 		uint32_t base = header->arm7Base;