MBC modes

Cargo.toml

@@ -11,4 +11,6 @@ bitflags = "2.4.1"
 log = "0.4.20"
 wgpu = "0.18.0"
 tokio = { version = "1.34.0", features = ["full"] }
-bytemuck = { version = "1.14.0", features = ["derive"] }
+bytemuck = { version = "1.14.0", features = ["derive"] }
+num-traits = "0.2"
+num-derive = "0.4"

src/main.rs

@@ -1,3 +1,6 @@
+#[macro_use]
+extern crate num_derive;
+
 use crate::context::Context;
 use crate::cpu::CPU;
 use crate::mode::GBMode;
@@ -21,6 +24,7 @@ mod registers;
 mod ppu;
 mod serial;
 mod timer;
+mod mbc;
 
 pub const CLOCK_FREQUENCY: u32 = 4_194_304;
 pub const STEP_TIME: u32 = 16;

src/mbc/mod.rs

@@ -0,0 +1 @@
+mod mode;

src/mbc/mode.rs

@@ -0,0 +1,79 @@
+#[derive(Clone, Copy, PartialEq, FromPrimitive)]
+pub enum CartTypes {
+    RomOnly = 0x00,
+    MBC1 = 0x01,
+    MBC1Ram = 0x02,
+    MBC1RamBat = 0x03,
+    MBC2 = 0x05,
+    MBC2Bat = 0x06,
+    // Unused
+    RomRam = 0x08,
+    // Unused
+    RomRamBat = 0x09,
+    MMM01 = 0x0B,
+    MMM01Ram = 0x0C,
+    MMM01RamBat = 0x0D,
+    MBC3TimerBat = 0x0F,
+    MBC3TimerRamBat = 0x10,
+    MBC3 = 0x11,
+    MBC3Ram = 0x12,
+    MBC3RamBat = 0x13,
+    MBC5 = 0x19,
+    MBC5Ram = 0x1A,
+    MBC5RamBat = 0x1B,
+    MBC5Rumble = 0x1C,
+    MBC5RumbleRam = 0x1D,
+    MBC5RumbleRamBat = 0x1E,
+    MBC6 = 0x20,
+    MBC7SensorRumbleRamBat = 0x22,
+    PocketCamera = 0xFC,
+    BandaiTAMA5 = 0xFD,
+    HuC3 = 0xFE,
+    HuC1RamBat = 0xFF
+}
+
+impl CartTypes {
+    pub fn get_mbc(&self) -> MBCMode {
+        match self {
+            CartTypes::RomOnly => MBCMode::RomOnly,
+            CartTypes::MBC1 => MBCMode::MBC1,
+            CartTypes::MBC1Ram => MBCMode::MBC1,
+            CartTypes::MBC1RamBat => MBCMode::MBC1,
+            CartTypes::MBC2 => MBCMode::MBC2,
+            CartTypes::MBC2Bat => MBCMode::MBC2,
+            CartTypes::RomRam => MBCMode::RomOnly,
+            CartTypes::RomRamBat => MBCMode::RomOnly,
+            CartTypes::MMM01 => MBCMode::RomOnly,
+            CartTypes::MMM01Ram => MBCMode::RomOnly,
+            CartTypes::MMM01RamBat => MBCMode::RomOnly,
+            CartTypes::MBC3TimerBat => MBCMode::MBC3,
+            CartTypes::MBC3TimerRamBat => MBCMode::MBC3,
+            CartTypes::MBC3 => MBCMode::MBC3,
+            CartTypes::MBC3Ram => MBCMode::MBC3,
+            CartTypes::MBC3RamBat => MBCMode::MBC3,
+            CartTypes::MBC5 => MBCMode::MBC5,
+            CartTypes::MBC5Ram => MBCMode::MBC5,
+            CartTypes::MBC5RamBat => MBCMode::MBC5,
+            CartTypes::MBC5Rumble => MBCMode::MBC5,
+            CartTypes::MBC5RumbleRam => MBCMode::MBC5,
+            CartTypes::MBC5RumbleRamBat => MBCMode::MBC5,
+            // All further type unimplemented
+            CartTypes::MBC6 => MBCMode::Unsupported,
+            CartTypes::MBC7SensorRumbleRamBat => MBCMode::Unsupported,
+            CartTypes::PocketCamera => MBCMode::Unsupported,
+            CartTypes::BandaiTAMA5 => MBCMode::Unsupported,
+            CartTypes::HuC3 => MBCMode::Unsupported,
+            CartTypes::HuC1RamBat => MBCMode::Unsupported,
+        }
+    }
+}
+
+#[derive(Clone, Copy, PartialEq)]
+pub enum MBCMode {
+    RomOnly,
+    MBC1,
+    MBC2,
+    MBC3,
+    MBC5,
+    Unsupported
+}