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decode inc a and dec a on CMOS

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Sam M W 2024-04-24 12:29:19 +01:00
parent ff5cf019fd
commit daf260697b
1 changed files with 2 additions and 0 deletions
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src/instruction.rs
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@ -495,6 +495,8 @@ impl crate::Variant for Cmos6502 {
fn decode(opcode: u8) -> Option<(Instruction, AddressingMode)> {
// TODO: We obviously need to add the other CMOS instructions here.
match opcode {
0x1a => Some((Instruction::INC, AddressingMode::Accumulator)),
0x3a => Some((Instruction::DEC, AddressingMode::Accumulator)),
0x6c => Some((Instruction::JMP, AddressingMode::Indirect)),
0x80 => Some((Instruction::BRA, AddressingMode::Relative)),
_ => Nmos6502::decode(opcode),