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-rw-r--r--src/apu.rs4
-rw-r--r--src/bin.rs21
-rw-r--r--src/cartridge.rs2
-rw-r--r--src/mapper.rs377
-rw-r--r--src/memory.rs15
-rw-r--r--src/ppu.rs14
6 files changed, 325 insertions, 108 deletions
diff --git a/src/apu.rs b/src/apu.rs
index 99f532b..4e764f7 100644
--- a/src/apu.rs
+++ b/src/apu.rs
@@ -522,7 +522,7 @@ impl<'a> APU<'a> {
pulse1: Pulse::new(false), pulse2: Pulse::new(true),
triangle: Triangle::new(),
noise: Noise::new(),
- frame_lvl: 0, frame_mode: false, frame_int: false, frame_inh: false,
+ frame_lvl: 0, frame_mode: false, frame_int: false, frame_inh: true,
cpu_sampler: Sampler::new(mos6502::CPU_FREQ, CPU_SAMPLE_FREQ),
audio_sampler: Sampler::new(mos6502::CPU_FREQ, AUDIO_SAMPLE_FREQ),
cycle_even: false,
@@ -584,7 +584,7 @@ impl<'a> APU<'a> {
}
pub fn write_frame_counter(&mut self, data: u8) {
- self.frame_inh = data & 0x40 == 1;
+ self.frame_inh = data & 0x40 == 0x40;
self.frame_mode = data >> 7 == 1;
if self.frame_mode {
self.tick_len_swp()
diff --git a/src/bin.rs b/src/bin.rs
index 22c3ac3..bddd83d 100644
--- a/src/bin.rs
+++ b/src/bin.rs
@@ -74,12 +74,14 @@ impl Cartridge for SimpleCart {
BankType::Sram => self.sram.len()
}
}
- fn get_bank(&mut self, base: usize, size: usize, kind: BankType) -> *mut [u8] {
- &mut (match kind {
- BankType::PrgRom => &mut self.prg_rom,
- BankType::ChrRom => &mut self.chr_rom,
- BankType::Sram => &mut self.sram,
- })[base..base + size]
+ fn get_bank<'a>(&mut self, base: usize, size: usize, kind: BankType) -> &'a mut [u8] {
+ unsafe {
+ &mut *((&mut (match kind {
+ BankType::PrgRom => &mut self.prg_rom,
+ BankType::ChrRom => &mut self.chr_rom,
+ BankType::Sram => &mut self.sram,
+ })[base..base + size]) as *mut [u8])
+ }
}
fn get_mirror_type(&self) -> MirrorType {self.mirror_type}
fn set_mirror_type(&mut self, mt: MirrorType) {self.mirror_type = mt}
@@ -258,19 +260,19 @@ impl<'a> sdl2::audio::AudioCallback for SDLAudioPlayback<'a> {
{
let b = &mut m.0;
let l1 = (b.tail + b.buffer.len() - b.head) % b.buffer.len();
- print!("{} ", l1);
+ //print!("{} ", l1);
for x in out.iter_mut() {
*x = b.deque()
}
}
- println!("{}", m.1);
+ //println!("{}", m.1);
if m.1 >= AUDIO_SAMPLES {
m.1 -= AUDIO_SAMPLES;
self.0.time_barrier.notify_one();
} else {
m.1 = 0;
- println!("audio frame skipping");
+ //println!("audio frame skipping");
}
}
}
@@ -393,6 +395,7 @@ fn main() {
let mut m: Box<mapper::Mapper> = match mapper_id {
0 | 2 => Box::new(mapper::Mapper2::new(cart)),
1 => Box::new(mapper::Mapper1::new(cart)),
+ 4 => Box::new(mapper::Mapper4::new(cart)),
_ => panic!("unsupported mapper {}", mapper_id)
};
diff --git a/src/cartridge.rs b/src/cartridge.rs
index 95085cd..52b43ca 100644
--- a/src/cartridge.rs
+++ b/src/cartridge.rs
@@ -17,7 +17,7 @@ pub enum BankType {
pub trait Cartridge {
fn get_size(&self, kind: BankType) -> usize;
- fn get_bank(&mut self, base: usize, size: usize, kind: BankType) -> *mut [u8];
+ fn get_bank<'a>(&mut self, base: usize, size: usize, kind: BankType) -> &'a mut [u8];
#[inline(always)] fn get_mirror_type(&self) -> MirrorType;
#[inline(always)] fn set_mirror_type(&mut self, mt: MirrorType);
}
diff --git a/src/mapper.rs b/src/mapper.rs
index 93c6fa9..cf946a2 100644
--- a/src/mapper.rs
+++ b/src/mapper.rs
@@ -1,10 +1,11 @@
#![allow(dead_code)]
extern crate core;
-use memory::VMem;
+use memory::{VMem, CPUBus};
use cartridge::{Cartridge, BankType, MirrorType};
pub trait Mapper : VMem {
fn get_cart(&self) -> &Cartridge;
+ fn tick(&mut self, _bus: &CPUBus) {}
}
pub struct Mapper1<'a, C> where C: Cartridge {
@@ -48,26 +49,28 @@ impl<'a, C> VMem for Mapper1<'a, C> where C: Cartridge {
impl<'a, C> Mapper1<'a, C> where C: Cartridge {
pub fn new(cart: C) -> Self {
+ let prg_nbank = cart.get_size(BankType::PrgRom) >> 14;
+ let chr_nbank = cart.get_size(BankType::ChrRom) >> 13;
unsafe {
- let prg_nbank = cart.get_size(BankType::PrgRom) >> 14;
- let chr_nbank = cart.get_size(BankType::ChrRom) >> 13;
- let null = core::mem::uninitialized();
let mut m = Mapper1{cart,
prg_nbank,
chr_nbank,
load_reg: 0x10,
ctl_reg: 0x0c,
- prg_banks: [null; 2],
- chr_banks: [core::mem::uninitialized(),
- core::mem::uninitialized()],
+ prg_banks: core::mem::uninitialized(),
+ chr_banks: core::mem::uninitialized(),
sram: core::mem::uninitialized()};
{
let c = &mut m.cart;
- m.prg_banks[0] = &*c.get_bank(0, 0x4000, BankType::PrgRom);
- m.prg_banks[1] = &*c.get_bank((prg_nbank - 1) << 14, 0x4000, BankType::PrgRom);
- m.chr_banks[0] = &mut *c.get_bank(0, 0x1000, BankType::ChrRom);
- m.chr_banks[1] = &mut *c.get_bank(0x1000, 0x1000, BankType::ChrRom);
- m.sram = &mut *c.get_bank(0, 0x2000, BankType::Sram);
+ m.prg_banks = [
+ c.get_bank(0, 0x4000, BankType::PrgRom),
+ 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)
+ ];
+ m.sram = c.get_bank(0, 0x2000, BankType::Sram);
}
m
}
@@ -81,71 +84,65 @@ impl<'a, C> Mapper1<'a, C> where C: Cartridge {
}
let triggered = self.load_reg & 1 == 1;
self.load_reg = (self.load_reg >> 1) | ((data & 1) << 4);
- if triggered { unsafe {
- let load_reg = self.load_reg;
- match (addr >> 13) & 3 {
- 0x0 => {
- self.ctl_reg = load_reg;
- self.cart.set_mirror_type(match load_reg & 3 {
- 0x0 => MirrorType::Single0,
- 0x1 => MirrorType::Single1,
- 0x2 => MirrorType::Vertical,
- _ => MirrorType::Horizontal
- });
- },
- 0x1 => {
- match (self.ctl_reg >> 4) & 1 {
- 0x0 => {
- let base = ((load_reg & 0xfe) as usize % self.chr_nbank) << 13;
- self.chr_banks[0] =
- &mut *self.cart.get_bank(base, 0x1000, BankType::ChrRom);
- self.chr_banks[1] =
- &mut *self.cart.get_bank(base + 0x1000, 0x1000, BankType::ChrRom)
- },
- _ =>
- self.chr_banks[0] = &mut *self.cart.get_bank(
- (load_reg as usize % (self.chr_nbank << 1)) << 12,
- 0x1000, BankType::ChrRom)
- }
- },
- 0x2 => {
- if (self.ctl_reg >> 4) & 1 == 1 {
- self.chr_banks[1] = &mut *self.cart.get_bank(
- (load_reg as usize % (self.chr_nbank << 1)) << 12,
- 0x1000, BankType::ChrRom)
- }
- },
- 0x3 => {
- let load_reg = load_reg & 0xf;
- match (self.ctl_reg >> 2) & 3 {
- 0x0 | 0x1 => {
- let base = ((load_reg & 0xfe) as usize % (self.prg_nbank >> 1)) << 15;
- self.prg_banks[0] =
- &*self.cart.get_bank(base, 0x4000, BankType::PrgRom);
- self.prg_banks[1] =
- &*self.cart.get_bank(base + 0x4000, 0x4000, BankType::PrgRom)
- },
- 0x2 => {
- self.prg_banks[0] = &*self.cart.get_bank(0, 0x4000, BankType::PrgRom);
- self.prg_banks[1] = &*self.cart.get_bank(
- (load_reg as usize % self.prg_nbank) << 14,
- 0x4000, BankType::PrgRom);
- },
- 0x3 => {
- self.prg_banks[0] = &*self.cart.get_bank(
- (load_reg as usize % self.prg_nbank) << 14,
- 0x4000, BankType::PrgRom);
- self.prg_banks[1] = &*self.cart.get_bank(
- (self.prg_nbank - 1) << 14,
- 0x4000, BankType::PrgRom);
- }
- _ => ()
- }
- },
- _ => ()
- }
- self.load_reg = 0x10;
- }}
+ if !triggered { return }
+
+ let load_reg = self.load_reg;
+ match (addr >> 13) & 3 {
+ 0x0 => {
+ self.ctl_reg = load_reg;
+ self.cart.set_mirror_type(match load_reg & 3 {
+ 0x0 => MirrorType::Single0,
+ 0x1 => MirrorType::Single1,
+ 0x2 => MirrorType::Vertical,
+ _ => MirrorType::Horizontal
+ });
+ },
+ 0x1 => {
+ match (self.ctl_reg >> 4) & 1 {
+ 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.chr_banks[0] = self.cart.get_bank(
+ (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(
+ (load_reg as usize % (self.chr_nbank << 1)) << 12,
+ 0x1000, BankType::ChrRom)
+ }
+ },
+ 0x3 => {
+ let load_reg = load_reg & 0xf;
+ match (self.ctl_reg >> 2) & 3 {
+ 0x0 | 0x1 => {
+ let base = ((load_reg & 0xfe) as usize % (self.prg_nbank >> 1)) << 15;
+ self.prg_banks = [
+ self.cart.get_bank(base, 0x4000, BankType::PrgRom),
+ self.cart.get_bank(base + 0x4000, 0x4000, BankType::PrgRom)
+ ];
+ },
+ 0x2 => self.prg_banks = [
+ self.cart.get_bank(0, 0x4000, BankType::PrgRom),
+ self.cart.get_bank((load_reg as usize % self.prg_nbank) << 14,
+ 0x4000, BankType::PrgRom)],
+ 0x3 => self.prg_banks = [
+ self.cart.get_bank((load_reg as usize % self.prg_nbank) << 14,
+ 0x4000, BankType::PrgRom),
+ self.cart.get_bank((self.prg_nbank - 1) << 14,
+ 0x4000, BankType::PrgRom)],
+ _ => ()
+ }
+ },
+ _ => ()
+ }
+ self.load_reg = 0x10;
}
}
@@ -180,11 +177,10 @@ impl<'a, C> VMem for Mapper2<'a, C> where C: Cartridge {
if addr < 0x2000 {
self.chr_bank[addr] = data;
} else if addr >= 0x8000 {
- self.prg_banks[0] = unsafe {
- &*self.cart.get_bank(((data as usize) % self.prg_nbank) << 14,
+ self.prg_banks[0] =
+ self.cart.get_bank(((data as usize) % self.prg_nbank) << 14,
0x4000,
BankType::PrgRom)
- }
} else if addr >= 0x6000 {
self.sram[addr - 0x6000] = data
} else {
@@ -195,20 +191,21 @@ impl<'a, C> VMem for Mapper2<'a, C> where C: Cartridge {
impl<'a, C> Mapper2<'a, C> where C: Cartridge {
pub fn new(cart: C) -> Self {
+ let nbank = cart.get_size(BankType::PrgRom) >> 14;
unsafe {
- let nbank = cart.get_size(BankType::PrgRom) >> 14;
- let null = core::mem::uninitialized();
let mut m = Mapper2{cart,
prg_nbank: nbank,
- prg_banks: [null; 2],
+ prg_banks: core::mem::uninitialized(),
chr_bank: core::mem::uninitialized(),
sram: core::mem::uninitialized()};
{
let c = &mut m.cart;
- m.prg_banks[0] = &*c.get_bank(0, 0x4000, BankType::PrgRom);
- m.prg_banks[1] = &*c.get_bank((nbank - 1) << 14, 0x4000, BankType::PrgRom);
- m.chr_bank = &mut *c.get_bank(0, 0x2000, BankType::ChrRom);
- m.sram = &mut *c.get_bank(0, 0x2000, BankType::Sram);
+ m.prg_banks = [
+ 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
}
@@ -218,3 +215,209 @@ 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}
}
+
+pub struct Mapper4<'a, C> where C: Cartridge {
+ cart: C,
+ prg_banks: [&'a [u8]; 4],
+ chr_banks: [&'a mut [u8]; 8],
+ sram: &'a mut [u8],
+ prg_nbank: usize, /* num of 16k PRG ROM banks */
+ chr_nbank: usize, /* num of 8k PRG ROM banks */
+ chr_inv: u8,
+ prg_mode: u8,
+ reg_idx: u8,
+ regs: [u8; 8], /* 4 pairs of registers */
+ irq_reload: u8,
+ irq_counter: u8,
+ irq_enable: bool
+}
+
+impl<'a, C> VMem for Mapper4<'a, C> where C: Cartridge {
+ fn read(&self, addr: u16) -> u8 {
+ let addr = addr as usize;
+ if addr < 0x2000 {
+ self.chr_banks[addr >> 10][addr & 0x3ff]
+ } else if addr >= 0x8000 {
+ let addr = addr - 0x8000;
+ self.prg_banks[addr >> 13][addr & 0x1fff]
+ } else if addr >= 0x6000 {
+ self.sram[addr - 0x6000]
+ } else {
+ panic!("unmapped address: 0x{:04x}", addr)
+ }
+ }
+
+ fn write(&mut self, addr: u16, data: u8) {
+ let addr = addr as usize;
+ if addr < 0x2000 {
+ self.chr_banks[addr >> 10][addr & 0x3ff] = data
+ } else if addr < 0x6000 {
+ panic!("invalid write to address: 0x{:04x}", addr)
+ } else if addr < 0x8000 {
+ self.sram[addr - 0x6000] = data
+ } else if addr < 0xa000 {
+ match addr & 1 {
+ 0 => self.write_select_reg(data),
+ _ => self.write_bank_data(data)
+ }
+ } else if addr < 0xc000 {
+ match addr & 1 {
+ 0 => self.write_mirror(data),
+ _ => ()
+ }
+ } else if addr < 0xe000 {
+ match addr & 1 {
+ 0 => self.irq_reload = data,
+ _ => self.irq_counter = 0
+ }
+ } else {
+ match addr & 1 {
+ 0 => self.irq_enable = false,
+ _ => self.irq_enable = true
+ }
+ }
+ }
+}
+
+impl<'a, C> Mapper4<'a, C> where C: Cartridge {
+ #[inline(always)]
+ fn write_select_reg(&mut self, data: u8) {
+ self.prg_mode = (data >> 6) & 1;
+ self.chr_inv = (data >> 7) & 1;
+ self.reg_idx = data & 0x7;
+ self.update_banks();
+ }
+
+ #[inline(always)]
+ fn write_bank_data(&mut self, data: u8) {
+ self.regs[self.reg_idx as usize] = data;
+ self.update_banks();
+ }
+
+ #[inline(always)]
+ fn write_mirror(&mut self, data: u8) {
+ self.cart.set_mirror_type(match data & 1 {
+ 0 => MirrorType::Vertical,
+ _ => MirrorType::Horizontal
+ })
+ }
+
+ #[inline(always)]
+ fn get_prgbank<'b>(&mut self, idx: u8) -> &'b mut [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)
+ }
+
+ fn update_banks(&mut self) {
+ macro_rules! make_arr {
+ ($mt: ident, $m: ident, [$($x: expr), *]) => {
+ [$({let t = ($x as usize % self.$m) as u8;
+ self.$mt(t)}), *]
+ };
+ }
+ self.prg_banks = match self.prg_mode {
+ 0 => make_arr!(get_prgbank, prg_nbank, [
+ self.regs[6],
+ self.regs[7],
+ (self.prg_nbank - 2) as u8,
+ (self.prg_nbank - 1) as u8
+ ]),
+ _ => make_arr!(get_prgbank, prg_nbank, [
+ (self.prg_nbank - 2) as u8,
+ self.regs[7],
+ self.regs[6],
+ (self.prg_nbank - 1) as u8
+ ])
+ };
+ self.chr_banks = match self.chr_inv {
+ 0 => make_arr!(get_chrbank, chr_nbank, [
+ self.regs[0] & 0xfe,
+ self.regs[0] | 0x01,
+ self.regs[1] & 0xfe,
+ self.regs[1] | 0x01,
+ self.regs[2],
+ self.regs[3],
+ self.regs[4],
+ self.regs[5]
+ ]),
+ _ => make_arr!(get_chrbank, chr_nbank, [
+ self.regs[2],
+ self.regs[3],
+ self.regs[4],
+ self.regs[5],
+ self.regs[0] & 0xfe,
+ self.regs[0] | 0x01,
+ self.regs[1] & 0xfe,
+ self.regs[1] | 0x01
+ ]),
+ };
+ }
+
+ pub fn new(cart: C) -> Self {
+ let prg_nbank = cart.get_size(BankType::PrgRom) >> 13;
+ let chr_nbank = cart.get_size(BankType::ChrRom) >> 10;
+ unsafe {
+ let mut m = Mapper4{cart,
+ prg_nbank,
+ chr_nbank,
+ prg_mode: 0,
+ chr_inv: 0,
+ reg_idx: 0,
+ regs: [0; 8],
+ prg_banks: core::mem::uninitialized(),
+ chr_banks: core::mem::uninitialized(),
+ sram: core::mem::uninitialized(),
+ irq_reload: 0,
+ irq_counter: 0,
+ irq_enable: false
+ };
+ m.prg_banks = [
+ m.get_prgbank(0),
+ m.get_prgbank(1),
+ m.get_prgbank((prg_nbank - 2) as u8),
+ m.get_prgbank((prg_nbank - 1) as u8)];
+ m.chr_banks = [
+ m.get_chrbank(0),
+ m.get_chrbank(0),
+ m.get_chrbank(0),
+ m.get_chrbank(0),
+ m.get_chrbank(0),
+ m.get_chrbank(0),
+ m.get_chrbank(0),
+ m.get_chrbank(0)];
+ {
+ let c = &mut m.cart;
+ m.sram = c.get_bank(0, 0x2000, BankType::Sram);
+ }
+ m
+ }
+ }
+}
+
+impl<'a, C> Mapper for Mapper4<'a, C> where C: Cartridge {
+ fn get_cart(&self) -> &Cartridge {&self.cart}
+ fn tick(&mut self, bus: &CPUBus) {
+ let ppu = bus.get_ppu();
+ if ppu.cycle != 260 {
+ return
+ }
+ if ppu.scanline > 239 && ppu.scanline < 261 {
+ return
+ }
+ if !ppu.get_show_bg() && !ppu.get_show_sp() {
+ return
+ }
+ if self.irq_counter == 0 {
+ self.irq_counter = self.irq_reload
+ } else {
+ self.irq_counter -= 1;
+ if self.irq_counter == 0 && self.irq_enable {
+ bus.get_cpu().trigger_irq();
+ }
+ }
+ }
+}
diff --git a/src/memory.rs b/src/memory.rs
index 6eb796f..fac5c28 100644
--- a/src/memory.rs
+++ b/src/memory.rs
@@ -37,15 +37,15 @@ impl<'a> CPUBus<'a> {
self.apu = apu;
}
- #[inline(always)] fn get_cpu(&self) -> &'a mut CPU<'a> {unsafe{&mut *self.cpu}}
- #[inline(always)] fn get_ppu(&self) -> &'a mut PPU<'a> {unsafe{&mut *self.ppu}}
- #[inline(always)] fn get_apu(&self) -> &'a mut APU<'a> {unsafe{&mut *self.apu}}
+ #[inline(always)] pub fn get_cpu(&self) -> &'a mut CPU<'a> {unsafe{&mut *self.cpu}}
+ #[inline(always)] pub fn get_ppu(&self) -> &'a mut PPU<'a> {unsafe{&mut *self.ppu}}
+ #[inline(always)] pub fn get_apu(&self) -> &'a mut APU<'a> {unsafe{&mut *self.apu}}
pub fn tick(&self) {
let cpu = self.get_cpu();
let ppu = self.get_ppu();
let apu = self.get_apu();
- if ppu.tick() || ppu.tick() || ppu.tick() {
+ if ppu.tick(self) || ppu.tick(self) || ppu.tick(self) {
cpu.trigger_nmi()
}
if apu.tick() {
@@ -244,7 +244,12 @@ impl<'a> PPUMemory<'a> {
#[inline(always)]
fn write_mapper(&self, addr: u16, data: u8) {
- self.mapper.borrow_mut().write(addr, data);
+ self.mapper.borrow_mut().write(addr, data)
+ }
+
+ #[inline(always)]
+ pub fn tick(&self, bus: &CPUBus) {
+ self.mapper.borrow_mut().tick(bus)
}
}
diff --git a/src/ppu.rs b/src/ppu.rs
index 45f00d4..95adc65 100644
--- a/src/ppu.rs
+++ b/src/ppu.rs
@@ -1,5 +1,5 @@
#![allow(dead_code)]
-use memory::{VMem, PPUMemory};
+use memory::{VMem, PPUMemory, CPUBus};
use mos6502::CPU;
use core::intrinsics::transmute;
@@ -189,8 +189,8 @@ impl<'a> PPU<'a> {
#[inline(always)] fn get_vram_inc(&self) -> u8 { (self.ppuctl >> 2) & 1}
#[inline(always)] fn get_show_leftmost_bg(&self) -> bool { (self.ppumask >> 1) & 1 == 1}
#[inline(always)] fn get_show_leftmost_sp(&self) -> bool { (self.ppumask >> 2) & 1 == 1}
- #[inline(always)] fn get_show_bg(&self) -> bool { (self.ppumask >> 3) & 1 == 1}
- #[inline(always)] fn get_show_sp(&self) -> bool { (self.ppumask >> 4) & 1 == 1}
+ #[inline(always)] pub fn get_show_bg(&self) -> bool { (self.ppumask >> 3) & 1 == 1}
+ #[inline(always)] pub fn get_show_sp(&self) -> bool { (self.ppumask >> 4) & 1 == 1}
#[inline(always)] pub fn get_flag_vblank(&self) -> bool { (self.ppustatus >> 7) & 1 == 1 }
#[inline(always)] fn get_oam_arr(&self) -> &[[u8; 4]; 64] {
unsafe {transmute::<&[Sprite; 64], &[[u8; 4]; 64]>(&self.oam)}
@@ -495,7 +495,13 @@ impl<'a> PPU<'a> {
self.get_flag_vblank() && self.get_flag_nmi()
}
- pub fn tick(&mut self) -> bool {
+ pub fn tick(&mut self, bus: &CPUBus) -> bool {
+ let res = self._tick();
+ self.mem.tick(bus);
+ res
+ }
+
+ fn _tick(&mut self) -> bool {
let cycle = self.cycle;
if cycle == 0 {
self.cycle = 1;