Question

Develop a sequence of instructions that will clear the three rightmost bits of DH without changing DH and save the result in BH.

Answer 1

Microprocessor Systems Assignment -

1. If AX=F100H and DX=2D23H, list the sum and the contents of flag register bits CF,ZF, SF and PF after ADD AX,DX executes.

2. Develop a sequence of instructions that add AL,BL,CL,DL and AH, and saves the sum in the DH register.

3. Based on the following screenshot, determine the result in the concerned memory locations after XOR [SI], AX is executed.

4. Choose an instruction that decrements the SI register by 1.

5. Choose an instruction that adds 1 to the BL register.

6. If DL=44H and BH=3FH, list the difference after BH is subtracted from DL