基于Keil C和Protues(51单片机)软件用汇编语言实现十六位数的加减乘运...答:;R3R2+R7R6=R3R2...C ADD16:MOV A,R2 ADD A,R6 MOV R2,A MOV A,R3 ADDC A,R7 MOV R3,A RET ;R3R2-R7R6=R3R2...C SUBB16:CLR C MOV A,R2 SUBB A,R6 MOV R2,A MOV A,R3 SUBB A,R7 MOV R3,A RET ;(R3R4*R6R7)=(R5R2R3R4)NMUL22 : MOV A,R4 MOV B,R7 MUL...