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Refactor PPU interrupt requests and fix Scroll X

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This commit is contained in:
Franco Colmenarez
2021-11-03 22:24:31 -05:00
parent 60fd55abca
commit c5ff92c0ab
5 changed files with 58 additions and 43 deletions
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src/bus.rs
+8 -8
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@@ -59,7 +59,7 @@ pub struct Bus {
impl Bus {
pub fn new() -> Self {
let game_rom = match ROM::load_file("ignore/tetris.gb".to_string()) {
let game_rom = match ROM::load_file("ignore/m3_scy_change.gb".to_string()) {
// let game_rom = match ROM::load_file("roms/cpu_instrs.gb".to_string()) {
// let game_rom = match ROM::load_file("roms/cpu_instrs_individual/01-special.gb".to_string()) {
// let game_rom = match ROM::load_file("roms/cpu_instrs_individual/02-interrupts.gb".to_string()) {
@@ -111,9 +111,6 @@ impl Bus {
if BANK_ZERO.in_range(address) || BANK_SWITCHABLE.in_range(address) {
return self.game_rom.read(address);
}
if address == JOYPAD_ADDRESS {
println!("{:08b}", self.data[address as usize]);
}
self.data[address as usize]
}
@@ -142,11 +139,14 @@ impl Bus {
} else if address == LCD_CONTROL_ADDRESS && get_bit(data, BitIndex::I7) {
self.data[address as usize] = data;
self.data[LCD_Y_ADDRESS as usize] = 0x00;
} else if address == JOYPAD_ADDRESS {
let byte = self.data[JOYPAD_ADDRESS as usize];
self.data[JOYPAD_ADDRESS as usize] = (data & 0b11110000) | (byte & 0b00001111);
} else if address == LCD_Y_ADDRESS {
println!("Write to LCD_Y not allowed");
// println!("Write to LCD_Y not allowed");
} else if address == LCD_STATUS_ADDRESS {
let byte = self.data[address as usize];
self.data[address as usize] = (data & 0b11111000) | (byte & 0b00000111);
} else if address == JOYPAD_ADDRESS {
let byte = self.data[address as usize];
self.data[address as usize] = (data & 0b11110000) | (byte & 0b00001111);
} else {
self.data[address as usize] = data;
}