diff options
Diffstat (limited to 'src/mapper.rs')
| -rw-r--r-- | src/mapper.rs | 137 |
1 files changed, 125 insertions, 12 deletions
diff --git a/src/mapper.rs b/src/mapper.rs index 4ecebbf..3d72189 100644 --- a/src/mapper.rs +++ b/src/mapper.rs @@ -3,10 +3,13 @@ extern crate core; use core::cell::UnsafeCell; use memory::{VMem, CPUBus}; use cartridge::{Cartridge, BankType, MirrorType}; +use utils::{Read, Write, load_prefix, save_prefix}; pub trait Mapper : VMem { fn get_cart(&self) -> &Cartridge; fn tick(&mut self, _bus: &CPUBus) {} + fn load(&mut self, reader: &mut Read) -> bool; + fn save(&self, writer: &mut Write) -> bool; } pub struct RefMapper<'a> { @@ -93,10 +96,10 @@ impl<'a, C> Mapper1<'a, C> where C: Cartridge { c.get_bank((prg_nbank - 1) << 14, 0x4000, BankType::PrgRom) ]; m.chr_banks = [ - c.get_bank(0, 0x1000, BankType::ChrRom), - c.get_bank(0x1000, 0x1000, BankType::ChrRom) + c.get_bank_mut(0, 0x1000, BankType::ChrRom), + c.get_bank_mut(0x1000, 0x1000, BankType::ChrRom) ]; - m.sram = c.get_bank(0, 0x2000, BankType::Sram); + m.sram = c.get_bank_mut(0, 0x2000, BankType::Sram); } m } @@ -128,18 +131,18 @@ impl<'a, C> Mapper1<'a, C> where C: Cartridge { 0x0 => { let base = ((load_reg & 0xfe) as usize % self.chr_nbank) << 13; self.chr_banks = [ - self.cart.get_bank(base, 0x1000, BankType::ChrRom), - self.cart.get_bank(base + 0x1000, 0x1000, BankType::ChrRom)]; + self.cart.get_bank_mut(base, 0x1000, BankType::ChrRom), + self.cart.get_bank_mut(base + 0x1000, 0x1000, BankType::ChrRom)]; }, _ => - self.chr_banks[0] = self.cart.get_bank( + self.chr_banks[0] = self.cart.get_bank_mut( (load_reg as usize % (self.chr_nbank << 1)) << 12, 0x1000, BankType::ChrRom) } }, 0x2 => { if (self.ctl_reg >> 4) & 1 == 1 { - self.chr_banks[1] = self.cart.get_bank( + self.chr_banks[1] = self.cart.get_bank_mut( (load_reg as usize % (self.chr_nbank << 1)) << 12, 0x1000, BankType::ChrRom) } @@ -174,6 +177,42 @@ impl<'a, C> Mapper1<'a, C> where C: Cartridge { impl<'a, C> Mapper for Mapper1<'a, C> where C: Cartridge { fn get_cart(&self) -> &Cartridge {&self.cart} + + fn load(&mut self, reader: &mut Read) -> bool { + for v in self.prg_banks.iter_mut() { + let mut offset: usize = 0; + if !load_prefix(&mut offset, 0, reader) { return false } + *v = self.cart.get_bank(offset, 0x4000, BankType::PrgRom); + } + for v in self.chr_banks.iter_mut() { + let mut offset: usize = 0; + if !load_prefix(&mut offset, 0, reader) { return false } + *v = self.cart.get_bank_mut(offset, 0x1000, BankType::ChrRom); + } + load_prefix(&mut self.ctl_reg, 0, reader) && + load_prefix(&mut self.load_reg, 0, reader) && + self.cart.load(reader) + } + + fn save(&self, writer: &mut Write) -> bool { + let prg_base = self.cart.get_bank(0, 0, BankType::PrgRom).as_ptr(); + let chr_base = self.cart.get_bank(0, 0, BankType::ChrRom).as_ptr(); + for v in self.prg_banks.iter() { + if !save_prefix(&(v.as_ptr() as usize - prg_base as usize), + 0, writer) { + return false + } + } + for v in self.chr_banks.iter() { + if !save_prefix(&(v.as_ptr() as usize - chr_base as usize), + 0, writer) { + return false + } + } + save_prefix(&self.ctl_reg, 0, writer) && + save_prefix(&self.load_reg, 0, writer) && + self.cart.save(writer) + } } pub struct Mapper2<'a, C> where C: Cartridge { @@ -233,8 +272,8 @@ impl<'a, C> Mapper2<'a, C> where C: Cartridge { c.get_bank(0, 0x4000, BankType::PrgRom), c.get_bank((nbank - 1) << 14, 0x4000, BankType::PrgRom) ]; - m.chr_bank = c.get_bank(0, 0x2000, BankType::ChrRom); - m.sram = c.get_bank(0, 0x2000, BankType::Sram); + m.chr_bank = c.get_bank_mut(0, 0x2000, BankType::ChrRom); + m.sram = c.get_bank_mut(0, 0x2000, BankType::Sram); } m } @@ -243,6 +282,34 @@ impl<'a, C> Mapper2<'a, C> where C: Cartridge { impl<'a, C> Mapper for Mapper2<'a, C> where C: Cartridge { fn get_cart(&self) -> &Cartridge {&self.cart} + + fn load(&mut self, reader: &mut Read) -> bool { + for v in self.prg_banks.iter_mut() { + let mut offset: usize = 0; + if !load_prefix(&mut offset, 0, reader) { return false } + *v = self.cart.get_bank(offset, 0x4000, BankType::PrgRom); + } + let mut offset: usize = 0; + if !load_prefix(&mut offset, 0, reader) { return false } + self.chr_bank = self.cart.get_bank_mut(offset, 0x2000, BankType::ChrRom); + self.cart.load(reader) + } + + fn save(&self, writer: &mut Write) -> bool { + let prg_base = self.cart.get_bank(0, 0, BankType::PrgRom).as_ptr(); + let chr_base = self.cart.get_bank(0, 0, BankType::ChrRom).as_ptr(); + for v in self.prg_banks.iter() { + if !save_prefix(&(v.as_ptr() as usize - prg_base as usize), + 0, writer) { + return false + } + } + if !save_prefix(&(self.chr_bank.as_ptr() as usize - chr_base as usize), + 0, writer) { + return false + } + self.cart.save(writer) + } } pub struct Mapper4<'a, C> where C: Cartridge { @@ -336,13 +403,13 @@ impl<'a, C> Mapper4<'a, C> where C: Cartridge { } #[inline(always)] - fn get_prgbank<'b>(&mut self, idx: u8) -> &'b mut [u8] { + fn get_prgbank<'b>(&self, idx: u8) -> &'b [u8] { self.cart.get_bank(0x2000 * idx as usize, 0x2000, BankType::PrgRom) } #[inline(always)] fn get_chrbank<'b>(&mut self, idx: u8) -> &'b mut [u8] { - self.cart.get_bank(0x400 * idx as usize, 0x400, BankType::ChrRom) + self.cart.get_bank_mut(0x400 * idx as usize, 0x400, BankType::ChrRom) } fn update_banks(&mut self) { @@ -424,7 +491,7 @@ impl<'a, C> Mapper4<'a, C> where C: Cartridge { m.get_chrbank(0)]; { let c = &mut m.cart; - m.sram = c.get_bank(0, 0x2000, BankType::Sram); + m.sram = c.get_bank_mut(0, 0x2000, BankType::Sram); } m } @@ -453,4 +520,50 @@ impl<'a, C> Mapper for Mapper4<'a, C> where C: Cartridge { } } } + + fn load(&mut self, reader: &mut Read) -> bool { + for v in self.prg_banks.iter_mut() { + let mut offset: usize = 0; + if !load_prefix(&mut offset, 0, reader) { return false } + *v = self.cart.get_bank(offset, 0x2000, BankType::PrgRom); + } + for v in self.chr_banks.iter_mut() { + let mut offset: usize = 0; + if !load_prefix(&mut offset, 0, reader) { return false } + *v = self.cart.get_bank_mut(offset, 0x400, BankType::ChrRom); + } + load_prefix(&mut self.chr_inv, 0, reader) && + load_prefix(&mut self.prg_mode, 0, reader) && + load_prefix(&mut self.reg_idx, 0, reader) && + load_prefix(&mut self.regs, 0, reader) && + load_prefix(&mut self.irq_reload, 0, reader) && + load_prefix(&mut self.irq_counter, 0, reader) && + load_prefix(&mut self.irq_enable, 0, reader) && + self.cart.load(reader) + } + + fn save(&self, writer: &mut Write) -> bool { + let prg_base = self.cart.get_bank(0, 0, BankType::PrgRom).as_ptr(); + let chr_base = self.cart.get_bank(0, 0, BankType::ChrRom).as_ptr(); + for v in self.prg_banks.iter() { + if !save_prefix(&(v.as_ptr() as usize - prg_base as usize), + 0, writer) { + return false + } + } + for v in self.chr_banks.iter() { + if !save_prefix(&(v.as_ptr() as usize - chr_base as usize), + 0, writer) { + return false + } + } + save_prefix(&self.chr_inv, 0, writer) && + save_prefix(&self.prg_mode, 0, writer) && + save_prefix(&self.reg_idx, 0, writer) && + save_prefix(&self.regs, 0, writer) && + save_prefix(&self.irq_reload, 0, writer) && + save_prefix(&self.irq_counter, 0, writer) && + save_prefix(&self.irq_enable, 0, writer) && + self.cart.save(writer) + } } |