ORG $6000 LDX #0 Label1 TXA STA $0400,X LDA #1 STA $D800,X INX BNE Label1 RTS .END assemble to emulator to debugger tools & config help trace

PC   A X Y SR SP 0000   00 00 00 20 FF N V - B D I Z C 0 0 1 0 0 0 0 0 AD   R1 R2 R3 R4 R5 R6 0000   00 00 00 00 00 00 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 0

load at addr step

tools & config help