3) Fill the register AL with the bit 3 of AH. If bit 3 of AH is 0, then AL must be 00H. If bit 3 of AH is 1, then AL must be FFH. 4) Rebuild the following instructions: 1. MOV AX, 00H 2. MOV AL, FFH 3. NOT BL 4. NEG CX
Added by Eric R.
Step 1
If 63 of AH is 0, then AHi is 0. If 63 of AH is 1, then AHi is 1. To extract the bit 3 of AHi, we can use the AND instruction with the mask 0x08 (binary 00001000). This will set all bits of AHi to 0 except for the bit 3, which will be copied to AL. The complete Show more…
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