M CHANGES → CHANGES

@@ -15,6 +15,7 @@ - Debugger: Conditional breakpoints and watchpoints
  - Ability to select GB/GBC/SGB BIOS on console ports
  - Optional automatic state saving/loading
  - Access to ur0 and uma0 partitions on the Vita
+ - Partial support for MBC6, TAMA and HuC-1 GB mappers
 Bugfixes:
  - GB Audio: Make audio unsigned with bias (fixes mgba.io/i/749)
  - GB Serialize: Fix audio state loading

M README.md → README.md

@@ -52,14 +52,14 @@ - MBC7
 
 The following mappers are partially supported:
 
+- MBC6
 - Pocket Cam
 - TAMA5
+- HuC-1
 - HuC-3
 
 The following mappers are not currently supported:
 
-- MBC6
-- HuC-1
 - MMM01
 
 ### Planned features

M src/gb/mbc.c → src/gb/mbc.c

@@ -27,6 +27,7 @@ static void _GBMBC3(struct GB*, uint16_t address, uint8_t value);
 static void _GBMBC5(struct GB*, uint16_t address, uint8_t value);
 static void _GBMBC6(struct GB*, uint16_t address, uint8_t value);
 static void _GBMBC7(struct GB*, uint16_t address, uint8_t value);
+static void _GBHuC1(struct GB*, uint16_t address, uint8_t value);
 static void _GBHuC3(struct GB*, uint16_t address, uint8_t value);
 static void _GBPocketCam(struct GB* gb, uint16_t address, uint8_t value);
 static void _GBTAMA5(struct GB* gb, uint16_t address, uint8_t value);
@@ -259,8 +260,7 @@ mLOG(GB_MBC, WARN, "unimplemented MBC: MMM01");
 		gb->memory.mbcWrite = _GBMBC1;
 		break;
 	case GB_HuC1:
-		mLOG(GB_MBC, WARN, "unimplemented MBC: HuC-1");
-		gb->memory.mbcWrite = _GBMBC1;
+		gb->memory.mbcWrite = _GBHuC1;
 		break;
 	case GB_HuC3:
 		gb->memory.mbcWrite = _GBHuC3;
@@ -819,6 +819,34 @@ } else if (GBMBC7FieldIsCS(value) && GBMBC7FieldIsCLK(old) && !GBMBC7FieldIsCLK(value)) {
 		value = GBMBC7FieldSetDO(value, GBMBC7FieldGetDO(old));
 	}
 	mbc7->eeprom = value;
+}
+
+void _GBHuC1(struct GB* gb, uint16_t address, uint8_t value) {
+	struct GBMemory* memory = &gb->memory;
+	int bank = value & 0x3F;
+	switch (address >> 13) {
+	case 0x0:
+		switch (value) {
+		case 0xE:
+			memory->sramAccess = false;
+			break;
+		default:
+			memory->sramAccess = true;
+			GBMBCSwitchSramBank(gb, memory->sramCurrentBank);
+			break;
+		}
+		break;
+	case 0x1:
+		GBMBCSwitchBank(gb, bank);
+		break;
+	case 0x2:
+		GBMBCSwitchSramBank(gb, value);
+		break;
+	default:
+		// TODO
+		mLOG(GB_MBC, STUB, "HuC-1 unknown address: %04X:%02X", address, value);
+		break;
+	}
 }
 
 void _GBHuC3(struct GB* gb, uint16_t address, uint8_t value) {