1. Explain what happens when the instruction sequence below is executed. LAHF MOV [BX+DI], AH

Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
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Chapter1: Computer Networks And The Internet
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1. Explain what happens when the instruction sequence below is executed.
LAHF
MOV [BX+DI] , AH
2. What operation is performed by the instruction sequence that follows?
MOV AH, [BX+SI]
SAHF
Transcribed Image Text:1. Explain what happens when the instruction sequence below is executed. LAHF MOV [BX+DI] , AH 2. What operation is performed by the instruction sequence that follows? MOV AH, [BX+SI] SAHF
1. Write an instruction sequence to save the current content of the flag in
memory location MEM1 and then reload the flags with the contents of
memory location MEM2.
LAHF
MOV MEM1, AH
MOV AH, MEM2
SAHF
HLT
2. Verify the operation of the following instructions that affect carry flag,
start with CF = 0.
CLC
STC
СМС
3. Write an instruction sequence to configure the 8086 as follows:
Interrupts not accepted; Save the original contents of flag SF,ZF,AF,PF
and CF at the address [0700H], then Clear the carry.
Transcribed Image Text:1. Write an instruction sequence to save the current content of the flag in memory location MEM1 and then reload the flags with the contents of memory location MEM2. LAHF MOV MEM1, AH MOV AH, MEM2 SAHF HLT 2. Verify the operation of the following instructions that affect carry flag, start with CF = 0. CLC STC СМС 3. Write an instruction sequence to configure the 8086 as follows: Interrupts not accepted; Save the original contents of flag SF,ZF,AF,PF and CF at the address [0700H], then Clear the carry.
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