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feat: implement more registers

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This commit is contained in:
Rekai Nyangadzayi Musuka
2021-01-17 21:13:59 -06:00
parent 70de3b9142
commit c0b8b8bda2
6 changed files with 106 additions and 8 deletions
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12
src/instruction.rs
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@@ -1509,10 +1509,12 @@ impl Instruction {
fn push(cpu: &mut Cpu, value: u16) {
let mut sp = cpu.register_pair(RegisterPair::SP);
// FIXME: Are these debug functions really necessary?
sp -= 1;
cpu.write_byte(sp, (value >> 8) as u8);
cpu.dbg_write_byte(sp, (value >> 8) as u8);
sp -= 1;
cpu.write_byte(sp, value as u8);
cpu.dbg_write_byte(sp, value as u8);
cpu.set_register_pair(RegisterPair::SP, sp);
}
@@ -1523,9 +1525,11 @@ impl Instruction {
fn pop(cpu: &mut Cpu) -> u16 {
let mut sp = cpu.register_pair(RegisterPair::SP);
let low = cpu.read_byte(sp);
// FIXME: Are these debug functions really necessary?
let low = cpu.dbg_read_byte(sp);
sp += 1;
let high = cpu.read_byte(sp);
let high = cpu.dbg_read_byte(sp);
sp += 1;
cpu.set_register_pair(RegisterPair::SP, sp);