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fix cram address issue

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This commit is contained in:
Franco Colmenarez 2021-12-27 10:58:40 -05:00
parent e48e8881e7
commit b4b560231e
1 changed files with 4 additions and 8 deletions
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12
src/ppu.rs
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@ -360,10 +360,6 @@ impl PPU {
self.vram[(address - 0x8000) as usize] self.vram[(address - 0x8000) as usize]
} }
fn write_vram(&mut self, address: u16, data: u8) {
self.vram[(address - 0x8000) as usize] = data;
}
pub fn read_oam(&self, address: u16) -> u8 { pub fn read_oam(&self, address: u16) -> u8 {
self.oam[(address - 0xFE00) as usize] self.oam[(address - 0xFE00) as usize]
} }
@ -395,10 +391,10 @@ impl PPU {
} }
let byte = self.cram_registers[(BCPS_BGPI_ADDRESS as usize) - 0xFF68]; let byte = self.cram_registers[(BCPS_BGPI_ADDRESS as usize) - 0xFF68];
let auto_increment = get_bit(byte, BitIndex::I7); let auto_increment = get_bit(byte, BitIndex::I7);
let cram_address = byte & 0b11111; let cram_address = byte & 0b111111;
self.bg_cram[cram_address as usize] = data; self.bg_cram[cram_address as usize] = data;
if auto_increment { if auto_increment {
self.cram_registers[(BCPS_BGPI_ADDRESS as usize) - 0xFF68] = ((byte + 1) & 0b11111) | ((auto_increment as u8) << 7); self.cram_registers[(BCPS_BGPI_ADDRESS as usize) - 0xFF68] = ((byte + 1) & 0b111111) | ((auto_increment as u8) << 7);
} }
} else if address == OCPD_OBPD_ADDRESS { } else if address == OCPD_OBPD_ADDRESS {
if self.get_lcd_status(LCDStatus::ModeFlag(LCDStatusModeFlag::TransferringToLCD)) { if self.get_lcd_status(LCDStatus::ModeFlag(LCDStatusModeFlag::TransferringToLCD)) {
@ -406,10 +402,10 @@ impl PPU {
} }
let byte = self.cram_registers[(OCPS_OBPI_ADDRESS as usize) - 0xFF68]; let byte = self.cram_registers[(OCPS_OBPI_ADDRESS as usize) - 0xFF68];
let auto_increment = get_bit(byte, BitIndex::I7); let auto_increment = get_bit(byte, BitIndex::I7);
let cram_address = byte & 0b11111; let cram_address = byte & 0b111111;
self.obj_cram[cram_address as usize] = data; self.obj_cram[cram_address as usize] = data;
if auto_increment { if auto_increment {
self.cram_registers[(OCPS_OBPI_ADDRESS as usize) - 0xFF68] = ((byte + 1) & 0b11111) | ((auto_increment as u8) << 7); self.cram_registers[(OCPS_OBPI_ADDRESS as usize) - 0xFF68] = ((byte + 1) & 0b111111) | ((auto_increment as u8) << 7);
} }
} }
} else if address == VRAM_BANK_SELECT_ADDRESS { } else if address == VRAM_BANK_SELECT_ADDRESS {