zrd Class Microprocessor Dr. Mohanad A. Shehab Homework (3): Logical Instructions 1) For register AH • Set bits b0, b3 • Invert bits bl, b6, b7 • Reset bit b2, • don't affect other bits

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Chapter22: Sequence Control
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Problem 6SQ: Draw a symbol for a solid-state logic element AND.
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3rd Class
Microprocessor
Dr. Mohanad A. Shehab
Homework (3): Logical Instructions
1) For register AH
• Set bits b0, b3
• Invert bits bl, b6, b7
• Reset bit b2,
• don't affect other bits
2) Trace the following program
MOV BX, 708EH
MOV AX, BX
MOV CX, 4802H
OR BL, BH
XOR BL, AH
SHL BL, 01H
NOT AH
AND AL, 93H
SAR BH, CL
ROL AL, 01H
RCR AH, CL
3) Fill the register AL with the bit 3 of AH, i.e.,
If b3 of AH=0 then AL must be 00H
If b3 of AH=1 then AL must be FFH
4) Rebuild the following instructions
1. MOV AX, 0000H
2. MOV AL, FFH
3. NOT BL
4. NEG CX
Transcribed Image Text:3rd Class Microprocessor Dr. Mohanad A. Shehab Homework (3): Logical Instructions 1) For register AH • Set bits b0, b3 • Invert bits bl, b6, b7 • Reset bit b2, • don't affect other bits 2) Trace the following program MOV BX, 708EH MOV AX, BX MOV CX, 4802H OR BL, BH XOR BL, AH SHL BL, 01H NOT AH AND AL, 93H SAR BH, CL ROL AL, 01H RCR AH, CL 3) Fill the register AL with the bit 3 of AH, i.e., If b3 of AH=0 then AL must be 00H If b3 of AH=1 then AL must be FFH 4) Rebuild the following instructions 1. MOV AX, 0000H 2. MOV AL, FFH 3. NOT BL 4. NEG CX
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