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Small PPU refactor for HDMA addresses

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This commit is contained in:
Franco Colmenarez 2022-10-12 08:07:25 -05:00
parent a69c5be762
commit 60bcc39a74
1 changed files with 17 additions and 23 deletions
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40
src/ppu.rs
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@ -390,17 +390,14 @@ impl PPU {
}
pub fn get_register(&self, address: u16) -> u8 {
if address >= 0xFF51 && address <= 0xFF55 {
if address == HDMA1_ADDRESS {
return self.hdma_source.to_be_bytes()[0];
} else if address == HDMA2_ADDRESS {
return self.hdma_source.to_be_bytes()[1];
} else if address == HDMA3_ADDRESS {
return self.hdma_destination.to_be_bytes()[0];
} else if address == HDMA4_ADDRESS {
return self.hdma_destination.to_be_bytes()[1];
} else if address == HDMA5_ADDRESS {
return self.hdma_start;
if address >= HDMA1_ADDRESS && address <= HDMA5_ADDRESS {
return match address {
HDMA1_ADDRESS => self.hdma_source.to_be_bytes()[0],
HDMA2_ADDRESS => self.hdma_source.to_be_bytes()[1],
HDMA3_ADDRESS => self.hdma_destination.to_be_bytes()[0],
HDMA4_ADDRESS => self.hdma_destination.to_be_bytes()[1],
HDMA5_ADDRESS => self.hdma_start,
_ => 0x00,
}
} else if address >= 0xFF68 && address <= 0xFF6B {
return self.cram_registers[(address as usize) - 0xFF68];
@ -415,18 +412,15 @@ impl PPU {
}
pub fn set_register(&mut self, address: u16, data: u8) {
if address >= 0xFF51 && address <= 0xFF55 {
if address == HDMA1_ADDRESS {
self.hdma_source = (self.hdma_source & 0xFF) | ((data as u16) << 8);
} else if address == HDMA2_ADDRESS {
self.hdma_source = (self.hdma_source & 0xFF00) | (data as u16);
} else if address == HDMA3_ADDRESS {
self.hdma_destination = (self.hdma_destination & 0xFF) | ((data as u16) << 8);
} else if address == HDMA4_ADDRESS {
self.hdma_destination = (self.hdma_destination & 0xFF00) | (data as u16);
} else if address == HDMA5_ADDRESS {
self.hdma_start = data;
}
if address >= HDMA1_ADDRESS && address <= HDMA5_ADDRESS {
match address {
HDMA1_ADDRESS => self.hdma_source = (self.hdma_source & 0xFF) | ((data as u16) << 8),
HDMA2_ADDRESS => self.hdma_source = (self.hdma_source & 0xFF00) | (data as u16),
HDMA3_ADDRESS => self.hdma_destination = (self.hdma_destination & 0xFF) | ((data as u16) << 8),
HDMA4_ADDRESS => self.hdma_destination = (self.hdma_destination & 0xFF00) | (data as u16),
HDMA5_ADDRESS => self.hdma_start = data,
_ => (),
};
} else if address >= 0xFF68 && address <= 0xFF6B {
self.cram_registers[(address as usize) - 0xFF68] = data;