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assembly

GATE Electronics & Communication · Sequential · 1991-2017

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2017 PYQ

The following five instructions were executed on an 8085 microprocessor. MVI A, 33H MVI B, 78H ADD B CMA ANI 32H The Accumulator value immediately after the execution of the fifth...

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2015 PYQ

In an 8085 microprocessor, which one of the following instructions changes the content of the accumulator?

easyanswer key
2015 PYQ

Which one of the following 8085 microprocessor programs correctly calculates the product of two 8-bit numbers stored in registers B and C?

mediumanswer key
2011 PYQ

An 8085 assembly language program is given below. Assume that the carry flag is initially unset. The content of the accumulator after the execution of the program is MVI A,07H RLC...

mediumanswer key
2010 PYQ

For the 8085 assembly language program given below, the content of the accumulator after the executions of the program is 3000 MVI A, 45H 3002 MOV B, A 3003 STC 3004 CMC 3005 RAR 3...

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2008 PYQ

An 8085 executes the following instructions 2710 LXI H, 30A0H DAD H PCHL All addresses and constants are in Hex. Let PC be the contents of the program counter and HL be the content...

easyanswer key
2007 PYQ

An 8085 assembly language program is given below. Line 1: MVI A, B5H 2: MVI B, 0EH 3: XRI 69H 4: ADD B 5: ANI 9BH 6: CPI 9FH 7: STA 3010H 8: HLT The contents of the accumulator jus...

mediumanswer key
2006 PYQ

Following is the segment of a 8085 assembly Language program: LXI SP, EFFF H CALL 3000 H 3000H: LXI H, 3CF4H PUSH PSW SPHL POP PSW RET On completion of RET execution, the contents...

mediumanswer key
2005 PYQ

Consider an 8085 microprocessor system If in addition following code exists from 0109H onwards ORI 40H, ADD M What will be the result in the accumulator after the last instruction...

mediumanswer key
2005 PYQ

Consider an 8085 microprocessor system The following program starts at locaton 0100H. LXI SP, 00FF LXI H, 0107 MVI A, 20H SUB M The contents of accumulator wnen the program counter...

mediumanswer key
2004 PYQ

The number of memory cycles required to execute the following 8085 instructions (I.) LDA 3000H (II.) LXI D, FOF 1H Would be

mediumanswer key
2004 PYQ

Consider the sequence of 8085 instructions given below. LXI H, 9258 MOV A, M CMA MOV M, A Which one of the following is performed by this sequence?

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2004 PYQ

It is desired to multiply the numbers 0AH by 0BH and store the result in the accumulator. The numbers are available in registers B and C respectively. A part of the 8085 program fo...

mediumanswer key
1996 PYQ

The following sequence of instructions are executed by an 8085 microprocessor: 1000: LXI SP< 27FF 1003: CALL 1006 1006: POP H The contents of the stack pointer (SP) and the HL regi...

mediumanswer key
1991 PYQ

The program given below is run on an 8085 based microcomputer system. Determine the contents of the registers: PC, SP, B, C, H, L after a half instruction is executed. LOC 2000 STA...

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