3. (5 points) Write an assembly program to test if the MSB in the register al is

Question

3. (5 points) Write an assembly program to test if the MSB in the register al is set: If it is set, then divide the content of al by 4 using the appropriate shift instruction and exit. Else, if it is not set, then multiply the content of al by 8 using the appropriate shift instruction and exit. When checking al MSB, do not change al content. - - Assume that al is equal to the signed integer 80h. - You need to come up with the appropriate mask to check the MSB. Run your program using the debugger to verify your answers. o Submit the following: Lastname3.asm

Explanation / Answer

.model tiny

.code

.startup

MOV BL,AL

AND BL,80H

CMP BL,80H

JNZ SET

MOV CL,02H

SAR AL,CL

JMP DONE

SET: MOV CL,03H

SAL AL,CL

DONE:

.exit

end

Above written is the alp code for the question. The appropriate mask used is 80h.  

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