DSK test MX %11 ORG $6000 FOO EQU $8000 ; @u8 JSR TEST BRK TEST LDX #$FF LDA #1 LOOP TAY TXA EOR #$FF LSR LSR STA FOO TYA CLC ADC FOO ; @Au(post) DEX ; @Xu(post) @Au,FOO(post) BNE LOOP RTS