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This commit is contained in:
Sam M W 2021-01-27 20:31:36 +00:00
parent 153f8e4bd7
commit 3844a730f0
1 changed files with 29 additions and 40 deletions
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13
src/cpu.rs
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@ -568,12 +568,6 @@ impl CPU {
// TODO: Implement binary-coded decimal
fn subtract_with_carry(&mut self, value: i8) {
if self.registers.status.contains(Status::PS_DECIMAL_MODE) {
debug!(
"binary-coded decimal not implemented for \
subtract_with_carry"
);
} else {
// A - M - (1 - C)
// nc -- 'not carry'
@ -607,16 +601,11 @@ impl CPU {
self.registers.status.set_with_mask(
mask,
Status::new(StatusArgs {
carry: did_carry,
overflow: did_overflow,
..StatusArgs::none()
}),
Status::new(StatusArgs { carry: did_carry, overflow: did_overflow, ..StatusArgs::none() }),
);
self.load_accumulator(a_after);
}
}
fn decrement_memory(&mut self, addr: Address) {
let value_new = self.memory.get_byte(addr).wrapping_sub(1);