Instruction does not affect the flag

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August undefined, 2024

Nettet3. jun. 2024 · Which flag is not affected by the DCR B instruction in 8085? 1). Parity 2). Carry 3). Zero 4). Sign 1 answers 1 vote Answered by Guest on 2024-06-03 11:38:47 Votes 1 # INR and DCR instructions affect all flags except carry flag ADI instruction affects all flags No flags are affected by INX and DCX instructions Join Telegram Group NettetIt is designed that way. CMA does not affect flags. If you need to evaluate a logical condition on the result of CMA, you should use CPI 0 after CMA.

Microprocessor-8086 MCQs Set-10 - ExamRadar

Nettet16. sep. 2024 · The sub and sbb instructions set the carry flag if an unsigned overflow occurs. Note that the dec instruction does not affect the carry flag. The aas instruction, like its aaa counterpart, lets you operate on strings of ASCII numbers with one decimal digit (in the range 0..9) per byte. This instruction uses the following algorithm: Nettet24. aug. 2024 · As there is no arithmetic or logical operation being performed, no flags are affected by data transfer instructions. Ex: MOV Rd, Rs MVI Rd, Data (8-bit) LXI Rp … rosedale international center columbus ohio

Which group of instructions does not affect the flags?

NettetCorrect option is C) DC x rp instructions will never affect the zero flag. The zero flag is a single bit flag that is a central feature on most conventional CPU architectures. It is often stored in a dedicated register, typically called status register or flag register, along with other flags. Was this answer helpful? Nettet18. apr. 2024 · the zero flag (ZF) is set to 1 if the results of an arithmetic or logical operation (like TEST) are 0. JE causes EIP to jump if ZF = 1. if the value in EAX is 0x81010102, the zero flag (ZF) does not get set, so flow of control does not branch here. if the value in EAX is 0x60E0FEFC, the zero flag (ZF) is set to 1. NettetLength of the instruction POP D is 1 byte 2 byte 3 byte 4 byte 07․ While INX B instruction execute, only carry flag will be affected all flags will be affected only carry and zero flags will be affected no flags will be affected 08․ While STC instruction executes, only carry flag will be affected. all flags will be affected. storage units near hamilton nj

Microprocessor-8086 MCQs Set-10 - ExamRadar

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NettetExamine the following instruction to be executed by a 8085 microprocessor. The input port has an address of 01 h and has a data 05 h to input: IN 01 H. ANI 80 H. After the … Nettet______Instruction would not affect Zero Flag. (i) XRA A (ii) SUB A (iii) CMPA (iv) MVI A, 00H [2] Instruction Set and Programming of 8085 VIEW SOLUTION Explain the … rosedale historyhttp://service.scs.carleton.ca/sivarama/asm_book_web/Student_copies/ch6_arithmetic.pdf storage units near greeley co

"NettetWhich is not part of the execution unit (EU)? In 8086 microprocessor one of the following statements is not true? The microprocessor determines whether the specified condition exists or not by testing the. The functions of Pins from 24 to 31 depend on the mode in which _______ is operating. In which year, 8086 was introduced? " - Instruction does not affect the flag

Instruction does not affect the flag

Why did CMA Instruction in 8085 not affect any flag after execution?

NettetCLC -- Clear Carry Flag Opcode Instruction Clocks Description F8 CLC 2 Clear carry flag Operation CF := 0; Description CLC sets the carry flag to zero. It does not affect other flags or registers. Flags Affected CF := 0 Protected Mode Exceptions None Real Address Mode Exceptions None NettetAnswer (1 of 2): You can understand the reason for this in a couple of ways. Notice that each flag says something specific about the results of an operation. For example, the carry flag (CF) is set when there is a carry out of Bit 7 after an instruction like ADD has been executed, or when there i...

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Nettet12. jan. 2024 · The flags register is affected by most instruction as a byproduct of the operation. – There are some instruction whose whole purpose is to change the flags register. – These include CMP, AND, OR, XOR, NOT, and NEG. What does CMP instruction do? The CMP instruction subtracts the value of Operand2 from the value … Nettet6. nov. 2024 · The least obvious and most notable case is that NOT doesn't affect FLAGS, apparently a design mistake by Stephen Morse when specifying the 8086 ISA. All the …

Nettet7. nov. 2024 · The least obvious and most notable case is that NOT doesn't affect FLAGS, apparently a design mistake by Stephen Morse when specifying the 8086 ISA. All the other standard ALU instructions that date back to 8086 affect at least some FLAGS, except for LEA which is sort of special. – Peter Cordes Nov 7, 2024 at 4:10 Add a comment Your … NettetAfter the execution of the two instructions the following flag portions may occur: 1. Zero flag is set 2. Zero flag is reset 3. Carry flag is cleared 4. Auxiliary carry flag is set Select the correct answer using the codes given below: 1 and 3 2, 3 …

Nettet29. mai 2024 · Solution: PUSH and POP instructions are not CALL instructions because in POP and PUSH instructions the pointer does not move to any location specified by … Nettet..............instruction does not affect the Flag. (i) RAR (ii) CMP C (iii) XRA (iv) MOV A,B Advertisement Remove all ads Solution (iv) MOV A,B Concept: Instruction Set and …

Nettet29. mai 2024 · Which of the following instructions affect the flag register of 8051? The carry flag is affected after an 8-bit addition or subtraction. The carry flag also be set to 1 or 0 directly by an instruction such as “SETB C” and “CLR C”. The “SETB C” stands for “set bit carry” and “CLR C” for “clear carry”.

NettetDuring a negation (NEG), the carry flag is set unless the operand is zero, in which case it is cleared. But, it doesn't help me reason about the carry flag. Why does it behave this way and how does NEG trigger a flag that supposed to represent a carry-out. In this answer they quote the manual, storage units near hanover nhNettet• Status flags are updated to indicate certain properties of the result ∗Example: If the result is zero, zero flag is set • Once a flag is set, it remains in that state until another instruction that affects the flags is executed • Not all instructions affect all status flags rosedale mall directoryNettet10. mar. 2024 · Just the flags. Let me illustrate. Let's say EAX = 00000005 and EBX = 00000005. If we do this arithmetic operation: CMP EAX, EBX. What's happening, is in effect this: EAX - EBX ----> 00000005 - 00000005. Since the result would be 0, but we don't change the destination operand in a CMP instruction, the zero flag is set to 1 … storage units near hagerstown mdNettet7.2K views, 88 likes, 4 loves, 49 comments, 16 shares, Facebook Watch Videos from SMNI News: LIVE: Dating Top 3 Man ng PNP, idinadawit sa P6.7-B d r u g case noong 2024 April 14, 2024 rosedale house richmondNettet9. apr. 2016 · The DEC instruction does not modify the carry flag. Consequently, the SHL EAX, CL instruction needs to execute the three micro-ops flow in subsequent iterations. The SUB instruction will update all flags. So replacing DEC with SUB will allow SHL EAX, CL to execute the two micro-ops flow. Terminology storage units near greece ny rosedale long islandNettet Which group of instructions does not affect the flags? A. Arithmetic B. Logic C. Data transfer D. Branch Please scroll down to see the correct answer and solution guide. Right Answer is: C SOLUTION Data Transfer In structions: The data transfer instructions are used to transfer 8/16-bit data from source to destination register. storage units near hampstead nc