More accurate variable declarations on nes.hexpat, add n64, gen, and gbx.hexpat

README.md

@@ -97,6 +97,8 @@ Everything will immediately show up in ImHex's Content Store and gets bundled wi
 | Flipper Zero Settings | | [`patterns/flipper_settings.hexpat`](patterns/flipper_settings.hexpat) | Flipper Zero Settings Files |
 | GB | `application/x-gameboy-rom` | [`patterns/gb.hexpat`](patterns/gb.hexpat) | Game Boy ROM |
 | GBA | `application/x-gameboy-advance-rom` | [`patterns/gba.hexpat`](patterns/gba.hexpat) | Game Boy Advance ROM header |
+| GBX | | [`patterns/gbx.hexpat`](patterns/gbx.hexpat) | GameBoy ROM file GBX footer |
+| Gen | | [`patterns/gen.hexpat`](patterns/gen.hexpat) | Sega Genesis/MegaDrive ROM |
 | GGUF | | [`patterns/gguf.hexpat`](patterns/gguf.hexpat) | GGML Inference Models |
 | GIF | `image/gif` | [`patterns/gif.hexpat`](patterns/gif.hexpat) | GIF image files |
 | GLTF | `model/gltf-binary` | [`patterns/gltf.hexpat`](patterns/gltf.hexpat) | GL Transmission Format binary 3D model file |
@@ -136,6 +138,7 @@ Everything will immediately show up in ImHex's Content Store and gets bundled wi
 | MSSCMP | | [`patterns/msscmp.hexpat`](patterns/msscmp.hexpat) | Miles Sound System Compressed Archive |
 | NACP | | [`patterns/nacp.hexpat`](patterns/nacp.hexpat) | Nintendo Switch NACP files |
 | NBT | | [`patterns/nbt.hexpat`](patterns/nbt.hexpat) | Minecraft NBT format |
+| N64 | | [`patterns/n64.hexpat`](patterns/n64.hexpat) | Nintendo 64 ROM header |
 | NDS | `application/x-nintendo-ds-rom` | [`patterns/nds.hexpat`](patterns/nds.hexpat) | DS Cartridge Header |
 | NE | `application/x-ms-ne-executable` | [`patterns/ne.hexpat`](patterns/ne.hexpat) | NE header and Standard NE fields |
 | nes | | [`patterns/nes.hexpat`](patterns/nes.hexpat) | Nintendo Entertainment System ROM |

patterns/gbx.hexpat

@@ -0,0 +1,61 @@
+#pragma author gmestanley
+#pragma description GameBoy ROM file GBX footer
+#pragma source hhug.me/gbx/1.0
+
+import gb;
+
+bitfield SachenMMC2SolderPad {
+	padding : 5;
+	opt1 : 1;
+	openBus512KiBOuterBanks : 1;
+	openBus1MiBOuterBanks : 1;
+};
+
+bitfield VastFameRunningValueType {
+	TaiwanReleases : 1;
+	MainlandChinaReleases : 1;
+};
+
+enum VastFamePCBType : u8 {
+	DSHGGB81,
+	BCR1616T3P
+};
+
+fn specialMapper(str value) { return value == "SAM2" || value == "VF01" || value == "GB81"; };
+
+struct MapperVariables {
+	match(parent.mapper) {
+		("SAM2"): SachenMMC2SolderPad solderPadConfig;
+		("VF01"): VastFameRunningValueType runningValue;
+		("GB81"): VastFamePCBType pcb; }
+	padding[3*specialMapper(parent.mapper)];
+	u32 mapperVariables[8-specialMapper(parent.mapper)];
+};
+
+struct CartridgeInformation {
+	char mapper[4];
+	bool battery;
+	bool rumble;
+	bool timer;
+	padding[1];
+	u32 romSize;
+	u32 ramSize;
+	if (specialMapper(mapper))
+		MapperVariables mapperVariables;
+	else
+		MapperVariables mapperVariables [[inline]];
+};
+
+struct GBXMetadata {
+	u32 footerSize;
+	u32 majorVersion;
+	u32 minorVersion;
+	char signature[4];
+};
+
+struct GBXFooter {
+	CartridgeInformation cartInfo;
+	GBXMetadata metadata;
+};
+
+be GBXFooter gbxFooter @ std::mem::size() - 0x40;

patterns/gen.hexpat

@@ -0,0 +1,137 @@
+#pragma author gmestanley
+#pragma description Sega Genesis/MegaDrive header
+#pragma source plutiedev.com/rom-header wiki.neogeodev.org/index.php?title=68k_vector_table
+
+#pragma endian big
+
+import std.string;
+
+struct M68000Vectors {
+	u32 stackPointerReset;
+	u32 programCounterReset [[comment("Entry Point")]];
+	u32 busError;
+	u32 addressError;
+	u32 illegalInstruction;
+	u32 divisionByZero;
+	u32 chkInstruction;
+	u32 trapVInstruction;
+	u32 privilegeViolation;
+	u32 trace;
+	u32 lineAInstruction;
+	u32 lineFInstruction;
+	padding[12];
+	u32 uninitializedInterruptVector;
+	padding[32];
+	u32 spuriousInterrupt;
+	u32 interruptAutovectors[7];
+	u32 traps[16];
+};
+
+M68000Vectors vectors @ 0x00;
+
+struct Info {
+	char softwareType[2];
+	char space;
+	char serialNumber[8];
+	char dash;
+	char revision[2];
+};
+
+enum DeviceType : char {
+	NotFilled = ' ',
+	Button3Controller = 'J',
+	Button6Controller = '6',
+	MasterSystemController = '0',
+	AnalogJoystick = 'A',
+	Multitap = '4',
+	Lightgun = 'G',
+	Activator = 'L',
+	Mouse = 'M',
+	Trackball = 'B',
+	Mouse = 'T',
+	Trackball = 'V',
+	Keyboard = 'K',
+	RS232 = 'R',
+	Printer = 'P',
+	CDROM = 'C',
+	FloppyDrive = 'F',
+	Download = 'D'
+};
+
+bitfield RAMType {
+	addresses : 1;
+	padding : 3;
+	bits : 2;
+	saves : 1;
+	sig : 1;
+};
+
+enum MemoryType : char {
+	RAM = ' ',
+	EEPROM = '@'
+};
+
+struct ExtraMemory {
+	char signature[2];
+	RAMType ramType;
+	MemoryType memoryType;
+	u32 startAddress;
+	u32 endAddress;
+};
+
+fn renderMicrophoneType(str value) {
+	match(value) {
+		("00"): value = "NoMicJapanOnly";
+		("10"): value = "MicJapanOnly";
+		("20"): value = "NoMicOverseasOnly";
+		("30"): value = "MicOverseasOnly";
+		("40"): value = "NoMic";
+		("50"): value = "Mic";
+		("60"): value = "NoMicJapan";
+		("70"): value = "NoMicOverseas";
+	}
+};
+
+struct ModemSupport {
+	char signature[2];
+	char publisher[4];
+	char gameNumber[2];
+	char comma;
+	char version;
+	char microphone[2] [[format("renderMicrophoneType")]];
+};
+
+enum RegionType : char {
+	None = ' ',
+	Japan = 'J',
+	Americas = 'U',
+	Europe = 'E'
+};
+
+fn formatTerminatedString(str string) {
+	u8 index;
+	while (index < std::string::length(string)) {
+		if (std::mem::read_string($+index, 2) == "  ")
+			break;
+		index += 1;
+	}
+	return "\"" + std::string::substr(string, 0, index) + "\"";
+};
+
+struct Header {
+	char systemType[16] [[format("formatTerminatedString")]];
+	char copyright[16] [[format("formatTerminatedString")]];
+	char domesticTitle[48] [[format("formatTerminatedString")]];
+	char overseasTitle[48] [[format("formatTerminatedString")]];
+	Info info;
+	u16 checksum;
+	DeviceType deviceType[16];
+	u32 romAddressRange[2];
+	u32 ramAddressRange[2];
+	if ($[$] == 'R') ExtraMemory extraMemory; else padding[12];
+	if ($[$] == 'M') ModemSupport modemSupport; else padding[12];
+	padding[40];
+	RegionType regions[3];
+};
+
+Header header @ 0x100;

patterns/n64.hexpat

@@ -0,0 +1,4 @@
+#pragma author gmestanley
+#pragma description Nintendo 64 ROM header
+
+char name[20] @ 0x20;