大学单片机汇编语言例子乘法加法

R1*R2R3 ORG 0000H LJMP MAIN ORG 0030H MAIN: MOV R1,#01H MOV R2,#02H MOV R3,#04H MOV A,R3 MOV B,R1 MUL AB MOV R6,A MOV R5,B MOV A,R2 MOV B,R1 MUL AB MOV R4,B ADD A,R5 MOV R5,A MOV A,R4 ADDC A,#00H MOV R4,A SJMP $ END R1R2R3R4 ORG 0000H LJMP MAIN ORG 0030H MAIN: MOV R1,#01H MOV R2,#01H MOV R3,#01H MOV R4,#00H LCALL MULL MOV R5,30H MOV R6,31H MOV R7,32H MOV A,R1 MOV R2,A LCALL MULL CLR C MOV A,32H ADD A,R6 MOV R6,A MOV A,R5 ADDC A,31H MOV R5,A MOV A,#00H ADDC A,30H MOV R4,A SJMP $ MULL: MOV A,R4 MOV B,R2 MUL AB MOV 32H,A MOV 31H,B MOV A,R3 MOV B,R2 MUL AB MOV 30H,B ADD A,31H MOV 31H,A MOV A,30H ADDC A,#00H MOV 30H,A RET END