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decrement_y_test passes

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Sam M W 2022-10-20 09:32:51 +01:00
parent c406965560
commit 41b9b19be2
1 changed files with 6 additions and 0 deletions
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6
src/cpu.rs
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@ -209,6 +209,12 @@ impl CPU {
(Instruction::DEC, OpInput::UseAddress(addr)) => self.decrement_memory(addr),
(Instruction::DEY, OpInput::UseImplied) => {
let mut r = u8::from_ne_bytes(self.registers.index_y.to_ne_bytes());
self.decrement(&mut r);
self.load_y_register(i8::from_ne_bytes(r.to_ne_bytes()));
}
(Instruction::DEX, OpInput::UseImplied) => {
self.dec_x();
}