Question

Pop-dulz VAR: DCB $40 ldaa #$41 adda#54f 1 2 bc done Idaa #0 LDAA VAR ADDA #SCO BVS DONE LDAA #55 done: nop DONE: NOP A= A= VAR: DC.B $40 VAR: DC.B $5 4 LDAA VAR 3 ADDA #$70 BMI DONE LDAA #0 LDAA VAR LDAB #7 MUL NOP DONE: NOP A= A= J. Lee

Answer 1

LDAA notequalto $ 41 rightarrow load A with 41 add a # $ 4 f rightarrow Add 4F to contants A = 41 + 4F = 01000001 A = 90 01001111 1 0 1 0 0 0 bvc done rightarrow if overflow clear idoa # 0 But have of = 0 so jump to done dor nop A = 90 VAR BC B $ 40 define constant byte LDAA var Load accumlbtor with BAR A = 40 ADDA # $ co Adds Co to BVS done A = 40 + Co = 10000000 LDAA # 55 0 0 0 0 0 0 A = 55 BVS rightarrow Brach if overflow set to donor VAR DC B $ 40 define constant byte LDAA VAR load with VAR A = 40 ADDA # $ 70 odds 70 To A = 70 + 40 = 0 1110000 BMI done A = 70 + 40 = 01110000 LDAA # 0 101110000 = BD BMI rightarrow Brach if minus wso minus So control does not to done VAR DC B $ 5 define constant byte LDAA VAR load A with 5 LDAB # 7 load B with 7 MUL # 7