$FF01/65281: U9 vector, switch 1540/1541 FF01: AD 02 02 LDA $0202 FF04: C9 2D CMP #$2D FF06: F0 05 BEQ $FF0D FF08: 38 SEC FF09: E9 2B SBC #$2B FF0B: D0 DA BNE $FEE7 FF0D: 85 23 STA $23 FF0F: 60 RTS Previous Page / Next Page