1. My initials (Damian E. Yerrick).
2. A 6502 instruction that subtracts 1 from register Y, wrapping the value to 255 if it's already zero.
- Function: Y--
- Updates flags: S . . . . . Z .
- Opcode numbers:
impl $88
Similar: DEC | DEX | INC | INX | INY
See also: 6502 instructions | 6502 addressing modes