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use super::mbc_type::MbcType; use rtc::Rtc; pub struct Cartridge { rom_banks: i32, ram_banks: i32, ram_size: i32, has_rtc: bool, has_battery: bool, rom: Vec<u8>, ram: Vec<u8>, name: String, mbc_type: MbcType, is_cgb: bool, rtc: Rtc, last_time: u64, } fn pow2ceil(i: i32) -> i32 { let mut i = i - 1; i |= i >> 1; i |= i >> 2; i |= i >> 4; i |= i >> 8; i += 1; i } impl Cartridge { pub fn from_rom(rom: Vec<u8>) -> Cartridge { let cartridge_type = i32::from(rom[0x0147]); let rom_banks = std::cmp::max(pow2ceil(rom.len() as i32 / 0x4000), 2); let ram_size = i32::from(rom[0x0149]); let ram_banks = match ram_size { 0x0 => 0, 0x1 => 1, 0x2 => 1, 0x3 => 4, 0x4 => 16, _ => panic!("Unknown number of RAM banks"), }; let has_rtc = match cartridge_type { 0x0F | 0x10 => true, _ => false, }; let has_battery = match cartridge_type { 0x03 | 0x06 | 0x09 | 0x0D | 0x0F | 0x10 | 0x13 | 0x17 | 0x1E | 0x1B | 0x22 | 0xFD | 0xFF => true, _ => false, }; let mut name = String::new(); let mut name_index = 0x0134; while rom[name_index] != 0x00 && name_index < 0x0143 { let c = rom[name_index] as char; name.push(c); name_index += 1; } let mbc_type = match cartridge_type { 0x00 | 0x08 | 0x09 => MbcType::RomOnly, 0x01 | 0x02 | 0x03 | 0xEA | 0xFF => MbcType::Mbc1, 0x05 | 0x06 => MbcType::Mbc2, 0x0F | 0x10 | 0x11 | 0x12 | 0x13 | 0xFC => MbcType::Mbc3, 0x19 | 0x1A | 0x1B | 0x1C | 0x1D | 0x1E => MbcType::Mbc5, _ => panic!("Unsupported cartridge type: {:?}", cartridge_type), }; let is_cgb = rom[0x0143] == 0xC0 || rom[0x0143] == 0x80; let ram = match mbc_type { MbcType::Mbc2 => vec![0x0F; 0x200], MbcType::Mbc5 => vec![0xFF; 0x20000], _ => vec![0xFF; 0x8000], }; Cartridge { rom_banks, ram_banks, ram_size, has_rtc, has_battery, rom, ram, name, mbc_type, is_cgb, rtc: Rtc::new(), last_time: 0, } } pub fn get_rom_banks(&self) -> i32 { self.rom_banks } pub fn get_ram_banks(&self) -> i32 { self.ram_banks } pub fn get_ram_size(&self) -> i32 { self.ram_size } pub fn has_rtc(&self) -> bool { self.has_rtc } pub fn has_battery(&self) -> bool { self.has_battery } pub fn get_rom(&self) -> &[u8] { self.rom.as_ref() } pub fn get_ram_mut(&mut self) -> &mut [u8] { self.ram.as_mut() } pub fn get_ram(&self) -> &[u8] { self.ram.as_ref() } pub fn set_ram(&mut self, ram: Vec<u8>) { self.ram = ram; } pub fn get_mbc_type(&self) -> MbcType { self.mbc_type } pub fn get_name(&self) -> &str { &self.name } pub fn is_cgb(&self) -> bool { self.is_cgb } pub fn get_last_timestamp(&self) -> (Rtc, u64) { (self.rtc, self.last_time) } pub fn set_last_timestamp(&mut self, rtc: Rtc, last_time: u64) { self.rtc.seconds = rtc.seconds; self.rtc.minutes = rtc.minutes; self.rtc.hours = rtc.hours; self.rtc.days_low = rtc.days_low; self.rtc.days_high = rtc.days_high; self.last_time = last_time; } }