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			4a1a21a08f
		
	
	| Author | SHA1 | Date | |
|---|---|---|---|
| 4a1a21a08f | |||
| 9d23b571fb | 
@@ -22,7 +22,7 @@ rtrb = "0.2"
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directories-next = "2.0"
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tracing = "0.1"
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tracing-subscriber = { version = "0.3", features = ["std", "env-filter"] }
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thiserror = "1.0.30"
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thiserror = "1.0"
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[profile.release]
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debug = true
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		||||
							
								
								
									
										20
									
								
								src/bus.rs
									
									
									
									
									
								
							
							
						
						
									
										20
									
								
								src/bus.rs
									
									
									
									
									
								
							@@ -10,7 +10,7 @@ use crate::work_ram::{VariableWorkRam, WorkRam};
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pub(crate) const BOOT_SIZE: usize = 0x100;
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#[derive(Debug)]
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#[derive(Debug, Default)]
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pub struct Bus {
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    boot: Option<[u8; BOOT_SIZE]>, // Boot ROM is 256b long
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    pub(crate) cart: Option<Cartridge>,
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@@ -25,24 +25,6 @@ pub struct Bus {
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    pub(crate) joyp: Joypad,
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}
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impl Default for Bus {
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    fn default() -> Self {
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        Self {
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            boot: None,
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            cart: None,
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            ppu: Default::default(),
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            work_ram: Default::default(),
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            var_ram: Default::default(),
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            timer: Default::default(),
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            int: Default::default(),
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            apu: Default::default(),
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            high_ram: Default::default(),
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            serial: Default::default(),
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            joyp: Default::default(),
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        }
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    }
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}
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impl Bus {
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    pub(crate) fn with_boot(rom: [u8; 256]) -> Self {
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        Self {
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		||||
							
								
								
									
										262
									
								
								src/cartridge.rs
									
									
									
									
									
								
							
							
						
						
									
										262
									
								
								src/cartridge.rs
									
									
									
									
									
								
							@@ -15,7 +15,7 @@ const ROM_MANUFACTURER_START: usize = 0x13F;
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pub(crate) struct Cartridge {
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    mem: Vec<u8>,
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    pub(crate) title: Option<String>,
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    mbc: Box<dyn MBCIo>,
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    mbc: Box<dyn MbcIo>,
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}
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impl Cartridge {
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@@ -44,7 +44,7 @@ impl Cartridge {
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        self.mbc.tick()
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    }
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    fn detect_mbc(mem: &[u8]) -> Box<dyn MBCIo> {
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    fn detect_mbc(mem: &[u8]) -> Box<dyn MbcIo> {
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        let ram_size: RamSize = mem[RAM_SIZE_ADDRESS].into();
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        let rom_size: RomSize = mem[ROM_SIZE_ADDRESS].into();
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        let mbc_kind = Self::detect_mbc_kind(mem[MBC_KIND_ADDRESS]);
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@@ -56,14 +56,14 @@ impl Cartridge {
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        tracing::info!("MBC kind: {:?}", mbc_kind);
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        match mbc_kind {
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            MBCKind::None => Box::new(NoMBC),
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            MBCKind::MBC1(hw) => Box::new(MBC1::new(hw, ram_size, rom_size)),
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            MBCKind::MBC2(hw) => Box::new(MBC2::new(hw, rom_cap)),
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            MBCKind::MBC3(hw @ MBC3Hardware::RTC) => Box::new(MBC3::new(hw, ram_cap)),
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            MBCKind::MBC3(hw @ MBC3Hardware::RTCAndBatteryRAM) => Box::new(MBC3::new(hw, ram_cap)),
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            MBCKind::MBC5(hw @ MBC5Hardware::None) => Box::new(MBC5::new(hw, ram_cap, rom_cap)),
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            MBCKind::MBC5(hw @ MBC5Hardware::BatteryRAM) => {
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                Box::new(MBC5::new(hw, ram_cap, rom_cap))
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            MbcKind::None => Box::new(NoMbc),
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            MbcKind::Mbc1(hw) => Box::new(Mbc1::new(hw, ram_size, rom_size)),
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            MbcKind::Mbc2(hw) => Box::new(Mbc2::new(hw, rom_cap)),
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            MbcKind::Mbc3(hw @ Mbc3Hardware::Rtc) => Box::new(Mbc3::new(hw, ram_cap)),
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            MbcKind::Mbc3(hw @ Mbc3Hardware::RtcBatteryRam) => Box::new(Mbc3::new(hw, ram_cap)),
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            MbcKind::Mbc4(hw @ Mbc5Hardware::None) => Box::new(Mbc5::new(hw, ram_cap, rom_cap)),
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            MbcKind::Mbc4(hw @ Mbc5Hardware::BatteryRam) => {
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                Box::new(Mbc5::new(hw, ram_cap, rom_cap))
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            }
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            kind => todo!("ROMS with {:?} are currently unsupported", kind),
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        }
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@@ -88,29 +88,29 @@ impl Cartridge {
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        }
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    }
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    fn detect_mbc_kind(id: u8) -> MBCKind {
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        use MBCKind::*;
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    fn detect_mbc_kind(id: u8) -> MbcKind {
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        use MbcKind::*;
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        match id {
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            0x00 => None,
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            0x01 => MBC1(MBC1Hardware::None),
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            0x02 => MBC1(MBC1Hardware::RAM),
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            0x03 => MBC1(MBC1Hardware::BatteryRAM),
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            0x05 => MBC2(MBC2Hardware::None),
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            0x06 => MBC2(MBC2Hardware::BatteryRAM),
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            0x01 => Mbc1(Mbc1Hardware::None),
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            0x02 => Mbc1(Mbc1Hardware::Ram),
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            0x03 => Mbc1(Mbc1Hardware::BatteryRam),
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            0x05 => Mbc2(Mbc2Hardware::None),
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            0x06 => Mbc2(Mbc2Hardware::BatteryRam),
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            0x08 | 0x09 => unimplemented!("NoMBC + RAM and NoMBC + Battery unsupported"),
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            0x0B | 0x0C | 0x0D => unimplemented!("MM01 unsupported"),
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            0x0F => MBC3(MBC3Hardware::RTC),
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            0x10 => MBC3(MBC3Hardware::RTCAndBatteryRAM),
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            0x11 => MBC3(MBC3Hardware::None),
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            0x12 => MBC3(MBC3Hardware::RAM),
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            0x13 => MBC3(MBC3Hardware::BatteryRAM),
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            0x19 => MBC5(MBC5Hardware::None),
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            0x1A => MBC5(MBC5Hardware::RAM),
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            0x1B => MBC5(MBC5Hardware::BatteryRAM),
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            0x1C => MBC5(MBC5Hardware::Rumble),
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            0x1D => MBC5(MBC5Hardware::RumbleRAM),
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            0x1E => MBC5(MBC5Hardware::RumbleBatteryRAM),
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            0x0F => Mbc3(Mbc3Hardware::Rtc),
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            0x10 => Mbc3(Mbc3Hardware::RtcBatteryRam),
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            0x11 => Mbc3(Mbc3Hardware::None),
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            0x12 => Mbc3(Mbc3Hardware::Ram),
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            0x13 => Mbc3(Mbc3Hardware::BatteryRam),
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            0x19 => Mbc4(Mbc5Hardware::None),
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            0x1A => Mbc4(Mbc5Hardware::Ram),
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            0x1B => Mbc4(Mbc5Hardware::BatteryRam),
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            0x1C => Mbc4(Mbc5Hardware::Rumble),
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            0x1D => Mbc4(Mbc5Hardware::RumbleRam),
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            0x1E => Mbc4(Mbc5Hardware::RumbleBatteryRam),
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            id => unimplemented!("MBC with code {:#04X} is unsupported", id),
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        }
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    }
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@@ -118,7 +118,7 @@ impl Cartridge {
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impl BusIo for Cartridge {
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    fn read_byte(&self, addr: u16) -> u8 {
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        use MBCResult::*;
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        use MbcResult::*;
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        match self.mbc.handle_read(addr) {
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            Addr(addr) => self.mem[addr],
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@@ -132,7 +132,7 @@ impl BusIo for Cartridge {
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}
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#[derive(Debug)]
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struct MBC1 {
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struct Mbc1 {
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    /// 5-bit number
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    rom_bank: u8,
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    /// 2-bit number
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@@ -143,11 +143,11 @@ struct MBC1 {
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    rom_size: RomSize,
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    mem_enabled: bool,
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    hw: MBC1Hardware,
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    hw: Mbc1Hardware,
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}
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impl MBC1 {
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    fn new(hw: MBC1Hardware, ram_size: RamSize, rom_size: RomSize) -> Self {
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impl Mbc1 {
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    fn new(hw: Mbc1Hardware, ram_size: RamSize, rom_size: RomSize) -> Self {
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        Self {
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            rom_bank: 0x01,
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            mem: vec![0; ram_size.capacity() as usize],
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@@ -225,25 +225,25 @@ impl MBC1 {
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    }
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}
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impl Savable for MBC1 {
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impl Savable for Mbc1 {
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    fn ext_ram(&self) -> Option<&[u8]> {
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        match self.hw {
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            MBC1Hardware::BatteryRAM => Some(&self.mem),
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            Mbc1Hardware::BatteryRam => Some(&self.mem),
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            _ => None,
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        }
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    }
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    fn ext_ram_mut(&mut self) -> Option<&mut [u8]> {
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        match self.hw {
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            MBC1Hardware::BatteryRAM => Some(&mut self.mem),
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            Mbc1Hardware::BatteryRam => Some(&mut self.mem),
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            _ => None,
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        }
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    }
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}
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impl MBCIo for MBC1 {
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    fn handle_read(&self, addr: u16) -> MBCResult {
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        use MBCResult::*;
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impl MbcIo for Mbc1 {
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    fn handle_read(&self, addr: u16) -> MbcResult {
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        use MbcResult::*;
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        match addr {
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            0x0000..=0x3FFF if self.mode => {
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@@ -277,7 +277,7 @@ impl MBCIo for MBC1 {
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    }
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}
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impl RtClockTick for MBC1 {
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impl RtcTick for Mbc1 {
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    fn tick(&mut self) {}
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}
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@@ -309,7 +309,7 @@ impl RtClock {
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    }
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}
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impl RtClockTick for RtClock {
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impl RtcTick for RtClock {
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    fn tick(&mut self) {
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        // This is the sort of situation where you'd want to use a scheduler.
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        if self.day_high.halt() {
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@@ -341,7 +341,7 @@ impl RtClockTick for RtClock {
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    }
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}
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trait RtClockTick {
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trait RtcTick {
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    fn tick(&mut self);
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}
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@@ -379,41 +379,41 @@ impl From<DayHigh> for u8 {
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}
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#[derive(Debug, Clone, Copy)]
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enum MBC3Device {
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    ExternalRam,
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    Clock(RtcRegister),
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enum Mbc3Device {
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    Ram,
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    Rtc(RtcRegister),
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}
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#[derive(Debug, Clone, Copy)]
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enum RtcRegister {
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    Second,
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    Minute,
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    Hour,
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    Sec,
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    Min,
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    Hr,
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    DayLow,
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    DayHigh,
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}
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#[derive(Debug)]
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struct MBC3 {
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struct Mbc3 {
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    /// 7-bit Number
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    rom_bank: u8,
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    /// 2-bit Number
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    ram_bank: u8,
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    devs_enabled: bool,
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    mapped: Option<MBC3Device>,
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    mapped: Option<Mbc3Device>,
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    mem: Vec<u8>,
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    // RTC Data Latch Previous Write
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    prev_latch_write: Option<u8>,
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    hw: MBC3Hardware,
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    hw: Mbc3Hardware,
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    rtc: RtClock,
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    rtc_latch: Option<RtClock>,
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}
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impl MBC3 {
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    fn new(hw: MBC3Hardware, ram_cap: usize) -> Self {
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impl Mbc3 {
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    fn new(hw: Mbc3Hardware, ram_cap: usize) -> Self {
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        Self {
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            mem: vec![0; ram_cap],
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            rom_bank: Default::default(),
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@@ -428,41 +428,41 @@ impl MBC3 {
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    }
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}
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impl Savable for MBC3 {
 | 
			
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impl Savable for Mbc3 {
 | 
			
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    fn ext_ram(&self) -> Option<&[u8]> {
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        match self.hw {
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            MBC3Hardware::BatteryRAM | MBC3Hardware::RTCAndBatteryRAM => Some(&self.mem),
 | 
			
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            Mbc3Hardware::BatteryRam | Mbc3Hardware::RtcBatteryRam => Some(&self.mem),
 | 
			
		||||
            _ => None,
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		||||
        }
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		||||
    }
 | 
			
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 | 
			
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    fn ext_ram_mut(&mut self) -> Option<&mut [u8]> {
 | 
			
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        match self.hw {
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            MBC3Hardware::BatteryRAM | MBC3Hardware::RTCAndBatteryRAM => Some(&mut self.mem),
 | 
			
		||||
            Mbc3Hardware::BatteryRam | Mbc3Hardware::RtcBatteryRam => Some(&mut self.mem),
 | 
			
		||||
            _ => None,
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl MBCIo for MBC3 {
 | 
			
		||||
    fn handle_read(&self, addr: u16) -> MBCResult {
 | 
			
		||||
        use MBCResult::*;
 | 
			
		||||
impl MbcIo for Mbc3 {
 | 
			
		||||
    fn handle_read(&self, addr: u16) -> MbcResult {
 | 
			
		||||
        use MbcResult::*;
 | 
			
		||||
        use RtcRegister::*;
 | 
			
		||||
 | 
			
		||||
        let res = match addr {
 | 
			
		||||
            0x0000..=0x3FFF => Addr(addr as usize),
 | 
			
		||||
            0x4000..=0x7FFF => Addr(0x4000 * self.rom_bank as usize + (addr as usize - 0x4000)),
 | 
			
		||||
            0xA000..=0xBFFF => match self.mapped {
 | 
			
		||||
                Some(MBC3Device::ExternalRam) if self.devs_enabled => {
 | 
			
		||||
                Some(Mbc3Device::Ram) if self.devs_enabled => {
 | 
			
		||||
                    Byte(self.mem[0x2000 * self.ram_bank as usize + (addr as usize - 0xA000)])
 | 
			
		||||
                }
 | 
			
		||||
                Some(MBC3Device::Clock(reg)) if self.devs_enabled => Byte(
 | 
			
		||||
                Some(Mbc3Device::Rtc(reg)) if self.devs_enabled => Byte(
 | 
			
		||||
                    self.rtc_latch
 | 
			
		||||
                        .as_ref()
 | 
			
		||||
                        .map(|rtc| match reg {
 | 
			
		||||
                            Second => rtc.sec,
 | 
			
		||||
                            Minute => rtc.min,
 | 
			
		||||
                            Hour => rtc.hr,
 | 
			
		||||
                            Sec => rtc.sec,
 | 
			
		||||
                            Min => rtc.min,
 | 
			
		||||
                            Hr => rtc.hr,
 | 
			
		||||
                            DayLow => rtc.day_low,
 | 
			
		||||
                            DayHigh => rtc.day_high.into(),
 | 
			
		||||
                        })
 | 
			
		||||
@@ -490,13 +490,13 @@ impl MBCIo for MBC3 {
 | 
			
		||||
            0x4000..=0x5FFF => match byte {
 | 
			
		||||
                0x00 | 0x01 | 0x02 | 0x03 => {
 | 
			
		||||
                    self.ram_bank = byte & 0x03;
 | 
			
		||||
                    self.mapped = Some(MBC3Device::ExternalRam);
 | 
			
		||||
                    self.mapped = Some(Mbc3Device::Ram);
 | 
			
		||||
                }
 | 
			
		||||
                0x08 => self.mapped = Some(MBC3Device::Clock(Second)),
 | 
			
		||||
                0x09 => self.mapped = Some(MBC3Device::Clock(Minute)),
 | 
			
		||||
                0x0A => self.mapped = Some(MBC3Device::Clock(Hour)),
 | 
			
		||||
                0x0B => self.mapped = Some(MBC3Device::Clock(DayLow)),
 | 
			
		||||
                0x0C => self.mapped = Some(MBC3Device::Clock(DayHigh)),
 | 
			
		||||
                0x08 => self.mapped = Some(Mbc3Device::Rtc(Sec)),
 | 
			
		||||
                0x09 => self.mapped = Some(Mbc3Device::Rtc(Min)),
 | 
			
		||||
                0x0A => self.mapped = Some(Mbc3Device::Rtc(Hr)),
 | 
			
		||||
                0x0B => self.mapped = Some(Mbc3Device::Rtc(DayLow)),
 | 
			
		||||
                0x0C => self.mapped = Some(Mbc3Device::Rtc(DayHigh)),
 | 
			
		||||
 | 
			
		||||
                _ => {}
 | 
			
		||||
            },
 | 
			
		||||
@@ -509,17 +509,17 @@ impl MBCIo for MBC3 {
 | 
			
		||||
                self.prev_latch_write = Some(byte);
 | 
			
		||||
            }
 | 
			
		||||
            0xA000..=0xBFFF => match self.mapped {
 | 
			
		||||
                Some(MBC3Device::ExternalRam) if self.devs_enabled => {
 | 
			
		||||
                Some(Mbc3Device::Ram) if self.devs_enabled => {
 | 
			
		||||
                    self.mem[0x2000 * self.ram_bank as usize + (addr as usize - 0xA000)] = byte
 | 
			
		||||
                }
 | 
			
		||||
                Some(MBC3Device::Clock(rtc_reg)) if self.devs_enabled => match rtc_reg {
 | 
			
		||||
                    Second => {
 | 
			
		||||
                Some(Mbc3Device::Rtc(rtc_reg)) if self.devs_enabled => match rtc_reg {
 | 
			
		||||
                    Sec => {
 | 
			
		||||
                        self.rtc.sec = byte & 0x3F;
 | 
			
		||||
                        // Writing to RTC S resets the internal sub-second counter
 | 
			
		||||
                        self.rtc.cycles = 0;
 | 
			
		||||
                    }
 | 
			
		||||
                    Minute => self.rtc.min = byte & 0x3F,
 | 
			
		||||
                    Hour => self.rtc.hr = byte & 0x1F,
 | 
			
		||||
                    Min => self.rtc.min = byte & 0x3F,
 | 
			
		||||
                    Hr => self.rtc.hr = byte & 0x1F,
 | 
			
		||||
                    DayLow => self.rtc.day_low = byte,
 | 
			
		||||
                    DayHigh => self.rtc.day_high = (byte & 0xC1).into(),
 | 
			
		||||
                },
 | 
			
		||||
@@ -530,16 +530,16 @@ impl MBCIo for MBC3 {
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl RtClockTick for MBC3 {
 | 
			
		||||
impl RtcTick for Mbc3 {
 | 
			
		||||
    fn tick(&mut self) {
 | 
			
		||||
        if let MBC3Hardware::RTCAndBatteryRAM | MBC3Hardware::RTC = self.hw {
 | 
			
		||||
        if let Mbc3Hardware::RtcBatteryRam | Mbc3Hardware::Rtc = self.hw {
 | 
			
		||||
            self.rtc.tick();
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#[derive(Debug)]
 | 
			
		||||
struct MBC5 {
 | 
			
		||||
struct Mbc5 {
 | 
			
		||||
    /// 9-bit number
 | 
			
		||||
    rom_bank: u16,
 | 
			
		||||
    /// 4-bit number
 | 
			
		||||
@@ -549,11 +549,11 @@ struct MBC5 {
 | 
			
		||||
    mem: Vec<u8>,
 | 
			
		||||
    mem_enabled: bool,
 | 
			
		||||
 | 
			
		||||
    hw: MBC5Hardware,
 | 
			
		||||
    hw: Mbc5Hardware,
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl MBC5 {
 | 
			
		||||
    fn new(hw: MBC5Hardware, ram_cap: usize, rom_cap: usize) -> Self {
 | 
			
		||||
impl Mbc5 {
 | 
			
		||||
    fn new(hw: Mbc5Hardware, ram_cap: usize, rom_cap: usize) -> Self {
 | 
			
		||||
        Self {
 | 
			
		||||
            rom_bank: 0x01,
 | 
			
		||||
            mem: vec![0; ram_cap],
 | 
			
		||||
@@ -569,25 +569,25 @@ impl MBC5 {
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl Savable for MBC5 {
 | 
			
		||||
impl Savable for Mbc5 {
 | 
			
		||||
    fn ext_ram(&self) -> Option<&[u8]> {
 | 
			
		||||
        match self.hw {
 | 
			
		||||
            MBC5Hardware::RumbleBatteryRAM | MBC5Hardware::BatteryRAM => Some(&self.mem),
 | 
			
		||||
            Mbc5Hardware::RumbleBatteryRam | Mbc5Hardware::BatteryRam => Some(&self.mem),
 | 
			
		||||
            _ => None,
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    fn ext_ram_mut(&mut self) -> Option<&mut [u8]> {
 | 
			
		||||
        match self.hw {
 | 
			
		||||
            MBC5Hardware::RumbleBatteryRAM | MBC5Hardware::BatteryRAM => Some(&mut self.mem),
 | 
			
		||||
            Mbc5Hardware::RumbleBatteryRam | Mbc5Hardware::BatteryRam => Some(&mut self.mem),
 | 
			
		||||
            _ => None,
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl MBCIo for MBC5 {
 | 
			
		||||
    fn handle_read(&self, addr: u16) -> MBCResult {
 | 
			
		||||
        use MBCResult::*;
 | 
			
		||||
impl MbcIo for Mbc5 {
 | 
			
		||||
    fn handle_read(&self, addr: u16) -> MbcResult {
 | 
			
		||||
        use MbcResult::*;
 | 
			
		||||
 | 
			
		||||
        match addr {
 | 
			
		||||
            0x0000..=0x3FFF => Addr(addr as usize),
 | 
			
		||||
@@ -615,25 +615,25 @@ impl MBCIo for MBC5 {
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl RtClockTick for MBC5 {
 | 
			
		||||
impl RtcTick for Mbc5 {
 | 
			
		||||
    fn tick(&mut self) {}
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#[derive(Debug)]
 | 
			
		||||
struct MBC2 {
 | 
			
		||||
struct Mbc2 {
 | 
			
		||||
    /// 4-bit number
 | 
			
		||||
    rom_bank: u8,
 | 
			
		||||
    mem: Box<[u8; Self::RAM_SIZE]>,
 | 
			
		||||
 | 
			
		||||
    mem_enabled: bool,
 | 
			
		||||
    rom_cap: usize,
 | 
			
		||||
    hw: MBC2Hardware,
 | 
			
		||||
    hw: Mbc2Hardware,
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl MBC2 {
 | 
			
		||||
impl Mbc2 {
 | 
			
		||||
    const RAM_SIZE: usize = 0x0200;
 | 
			
		||||
 | 
			
		||||
    fn new(hw: MBC2Hardware, rom_cap: usize) -> Self {
 | 
			
		||||
    fn new(hw: Mbc2Hardware, rom_cap: usize) -> Self {
 | 
			
		||||
        Self {
 | 
			
		||||
            rom_bank: 0x01,
 | 
			
		||||
            mem: Box::new([0; Self::RAM_SIZE]),
 | 
			
		||||
@@ -648,25 +648,25 @@ impl MBC2 {
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl Savable for MBC2 {
 | 
			
		||||
impl Savable for Mbc2 {
 | 
			
		||||
    fn ext_ram(&self) -> Option<&[u8]> {
 | 
			
		||||
        match self.hw {
 | 
			
		||||
            MBC2Hardware::BatteryRAM => Some(self.mem.as_ref()),
 | 
			
		||||
            MBC2Hardware::None => None,
 | 
			
		||||
            Mbc2Hardware::BatteryRam => Some(self.mem.as_ref()),
 | 
			
		||||
            Mbc2Hardware::None => None,
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    fn ext_ram_mut(&mut self) -> Option<&mut [u8]> {
 | 
			
		||||
        match self.hw {
 | 
			
		||||
            MBC2Hardware::BatteryRAM => Some(self.mem.as_mut()),
 | 
			
		||||
            MBC2Hardware::None => None,
 | 
			
		||||
            Mbc2Hardware::BatteryRam => Some(self.mem.as_mut()),
 | 
			
		||||
            Mbc2Hardware::None => None,
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl MBCIo for MBC2 {
 | 
			
		||||
    fn handle_read(&self, addr: u16) -> MBCResult {
 | 
			
		||||
        use MBCResult::*;
 | 
			
		||||
impl MbcIo for Mbc2 {
 | 
			
		||||
    fn handle_read(&self, addr: u16) -> MbcResult {
 | 
			
		||||
        use MbcResult::*;
 | 
			
		||||
 | 
			
		||||
        match addr {
 | 
			
		||||
            0x0000..=0x3FFF => Addr(addr as usize),
 | 
			
		||||
@@ -698,14 +698,14 @@ impl MBCIo for MBC2 {
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl RtClockTick for MBC2 {
 | 
			
		||||
impl RtcTick for Mbc2 {
 | 
			
		||||
    fn tick(&mut self) {}
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#[derive(Debug)]
 | 
			
		||||
struct NoMBC;
 | 
			
		||||
struct NoMbc;
 | 
			
		||||
 | 
			
		||||
impl Savable for NoMBC {
 | 
			
		||||
impl Savable for NoMbc {
 | 
			
		||||
    fn ext_ram(&self) -> Option<&[u8]> {
 | 
			
		||||
        None
 | 
			
		||||
    }
 | 
			
		||||
@@ -715,9 +715,9 @@ impl Savable for NoMBC {
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl MBCIo for NoMBC {
 | 
			
		||||
    fn handle_read(&self, addr: u16) -> MBCResult {
 | 
			
		||||
        MBCResult::Addr(addr as usize)
 | 
			
		||||
impl MbcIo for NoMbc {
 | 
			
		||||
    fn handle_read(&self, addr: u16) -> MbcResult {
 | 
			
		||||
        MbcResult::Addr(addr as usize)
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    fn handle_write(&mut self, _: u16, byte: u8) {
 | 
			
		||||
@@ -725,60 +725,60 @@ impl MBCIo for NoMBC {
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl RtClockTick for NoMBC {
 | 
			
		||||
impl RtcTick for NoMbc {
 | 
			
		||||
    fn tick(&mut self) {}
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
trait MBCIo: Savable + RtClockTick {
 | 
			
		||||
    fn handle_read(&self, addr: u16) -> MBCResult;
 | 
			
		||||
trait MbcIo: Savable + RtcTick {
 | 
			
		||||
    fn handle_read(&self, addr: u16) -> MbcResult;
 | 
			
		||||
    fn handle_write(&mut self, addr: u16, byte: u8);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#[derive(Debug, Clone, Copy)]
 | 
			
		||||
enum MBCResult {
 | 
			
		||||
enum MbcResult {
 | 
			
		||||
    Addr(usize),
 | 
			
		||||
    Byte(u8),
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#[derive(Debug, Clone, Copy)]
 | 
			
		||||
enum MBCKind {
 | 
			
		||||
enum MbcKind {
 | 
			
		||||
    None,
 | 
			
		||||
    MBC1(MBC1Hardware),
 | 
			
		||||
    MBC2(MBC2Hardware),
 | 
			
		||||
    MBC3(MBC3Hardware),
 | 
			
		||||
    MBC5(MBC5Hardware),
 | 
			
		||||
    Mbc1(Mbc1Hardware),
 | 
			
		||||
    Mbc2(Mbc2Hardware),
 | 
			
		||||
    Mbc3(Mbc3Hardware),
 | 
			
		||||
    Mbc4(Mbc5Hardware),
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#[derive(Debug, Clone, Copy)]
 | 
			
		||||
enum MBC1Hardware {
 | 
			
		||||
enum Mbc1Hardware {
 | 
			
		||||
    None,
 | 
			
		||||
    RAM,
 | 
			
		||||
    BatteryRAM,
 | 
			
		||||
    Ram,
 | 
			
		||||
    BatteryRam,
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#[derive(Debug, Clone, Copy)]
 | 
			
		||||
enum MBC2Hardware {
 | 
			
		||||
enum Mbc2Hardware {
 | 
			
		||||
    None,
 | 
			
		||||
    BatteryRAM,
 | 
			
		||||
    BatteryRam,
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#[derive(Debug, Clone, Copy)]
 | 
			
		||||
enum MBC3Hardware {
 | 
			
		||||
    RTC,
 | 
			
		||||
    RTCAndBatteryRAM,
 | 
			
		||||
enum Mbc3Hardware {
 | 
			
		||||
    Rtc,
 | 
			
		||||
    RtcBatteryRam,
 | 
			
		||||
    None,
 | 
			
		||||
    RAM,
 | 
			
		||||
    BatteryRAM,
 | 
			
		||||
    Ram,
 | 
			
		||||
    BatteryRam,
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#[derive(Debug, Clone, Copy)]
 | 
			
		||||
enum MBC5Hardware {
 | 
			
		||||
enum Mbc5Hardware {
 | 
			
		||||
    None,
 | 
			
		||||
    RAM,
 | 
			
		||||
    BatteryRAM,
 | 
			
		||||
    Ram,
 | 
			
		||||
    BatteryRam,
 | 
			
		||||
    Rumble,
 | 
			
		||||
    RumbleRAM,
 | 
			
		||||
    RumbleBatteryRAM,
 | 
			
		||||
    RumbleRam,
 | 
			
		||||
    RumbleBatteryRam,
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#[derive(Debug, Clone, Copy, PartialEq)]
 | 
			
		||||
@@ -874,7 +874,7 @@ impl From<u8> for RomSize {
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl std::fmt::Debug for Box<dyn MBCIo> {
 | 
			
		||||
impl std::fmt::Debug for Box<dyn MbcIo> {
 | 
			
		||||
    fn fmt(&self, _f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
 | 
			
		||||
        todo!("Implement Debug for Box<dyn MBC> Trait Object");
 | 
			
		||||
    }
 | 
			
		||||
 
 | 
			
		||||
							
								
								
									
										11
									
								
								src/ppu.rs
									
									
									
									
									
								
							
							
						
						
									
										11
									
								
								src/ppu.rs
									
									
									
									
									
								
							@@ -797,21 +797,12 @@ impl Default for BackgroundFetcher {
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#[derive(Debug)]
 | 
			
		||||
#[derive(Debug, Default)]
 | 
			
		||||
struct ObjectFetcher {
 | 
			
		||||
    state: FetcherState,
 | 
			
		||||
    tile: TileBuilder,
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl Default for ObjectFetcher {
 | 
			
		||||
    fn default() -> Self {
 | 
			
		||||
        Self {
 | 
			
		||||
            state: Default::default(),
 | 
			
		||||
            tile: Default::default(),
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
impl Fetcher for ObjectFetcher {
 | 
			
		||||
    fn reset(&mut self) {
 | 
			
		||||
        self.state = Default::default();
 | 
			
		||||
 
 | 
			
		||||
		Reference in New Issue
	
	Block a user