Code: Select all
SEC
LDA x1
SBC x2
BCS positive
EOR #$FF ; C flag is clear here,
ADC #$01 ; form two's complement
.positive
STA dx
Code: Select all
SEC
LDA x1
SBC x2
BCS positive
EOR #$FF ; C flag is clear here,
ADC #$01 ; form two's complement
.positive
STA dx