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DEC, DEX and DEY instructions

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FranLMSP
2022-11-26 21:51:51 -05:00
parent b1b80e0c48
commit 82f8676a39
4 changed files with 195 additions and 20 deletions
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snes-core/src/utils/addressing.rs
+11
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@@ -142,6 +142,17 @@ impl AddressingMode {
let address = self.effective_address(bus, pc_addr, direct_page_register, stack_pointer, x, y);
return (bus.read(address) as u16) | ((bus.read(address + 1) as u16) << 8);
}
pub fn store_8bit(self, bus: &mut Bus, pc_addr: u32, direct_page_register: u16, stack_pointer: u16, x: u16, y: u16, value: u8) {
let address = self.effective_address(bus, pc_addr, direct_page_register, stack_pointer, x, y);
bus.write(address, value);
}
pub fn store_16bit(self, bus: &mut Bus, pc_addr: u32, direct_page_register: u16, stack_pointer: u16, x: u16, y: u16, value: u16) {
let address = self.effective_address(bus, pc_addr, direct_page_register, stack_pointer, x, y);
bus.write(address, value as u8);
bus.write(address + 1, (value >> 8) as u8);
}
}
#[cfg(test)]