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Recent questions and answers in Computer Organization

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GATE ECE 2026 | Question: 32
The address of the first location of a $256$ kilo byte $(\mathrm{KB})$ memory is $(2500)_{\mathrm{H}}$.Choose the correct address of the last location of the memory.$(2 \...
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GATE ECE 2024 | Question: 17
A machine has a $32$-bit architecture with $1$-word long instructions. It has $24$ registers and supports an instruction set of size $40$. Each instruction has five disti...
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394
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GATE ECE 2005 | Question: 81b
Statement for Linked Answer Questions $81 a$ and $81 b$:Consider an $8085$ microprocessor systemIf in addition following code exists from $019 \mathrm{H}$ onwards,$\text{...
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GATE ECE 1997 | Question 2.10
In an $8085 \; \mu \; \mathrm{P}$ system, the $\text{RST}$ instruction will cause an interruptonly if an interrupt service routine is not being executedonly if a bit in t...
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GATE ECE 1997 | Question 4.3
The following insturctions have been executed by an $8085 \; \mu \mathrm{P}$$\begin{array}{cl}\text { ADDRESS (HEX) } & \text { INSTRUCTION } \\ 6010 & \text { LXI H, 8A ...
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GATE ECE 1997 | Question 5.5
While moving data between registers of the $8085$ and the stack(1) a $\text{PUSH}$ instructionPre increments the stack pointer(2) a $\text{POP}$ instructionPost increment...
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GATE ECE 1997 | Question 20
An $8085 \; \mu \mathrm{P}$ uses a $2 \; \mathrm{MHz}$ crystal. Find the time taken by it to execute the following delay subroutine, inclusive of the call instruction in ...
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GATE ECE 2000 | Question 1.16
The number of hardware interrupts (which require an external signal to interrupt) present in an $8085$ microprocessor are$1$$4$$5$$13$
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GATE ECE 2000 | Question 1.20
In the $8085$ microprocessor, the $\text{RST6}$ instruction transfers the program execution to the following location:$30 \mathrm{~H}$$24 \mathrm{~H}$$48 \mathrm{~H}$$60 ...
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GATE ECE 2000 | Question 2.10
The contents of Register $\text{(B)}$ and Accumulator $\text{(A)}$ of $8085$ microprocessor are $49 \mathrm{H}$ and $3 \mathrm{AH}$ respectively. The contents of $\mathrm...
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GATE ECE 2000 | Question 17
(a) The program and machine code for an $8085$ microprocessor are given by$\begin{array}{lll}3 \mathrm{E} & \text {MVI} & \text {A} \\ \text {C3} & & \\ 00 & \text {NOP} ...
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GATE ECE 1999 | Question 2.13
If $\text{CS}=\text{A}_{15} \; \text{ A}_{14} \; \text{A}_{13}$ is used as the chip select logic of a $4 \; \text{K RAM}$ in an $8085$ system, then its memory range will ...
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GATE ECE 1999 | Question 13
An $8085$ assembly language program is given below$\begin{array}{ll} & \text{ MVIC, 03H } \\ & \text { LXIH, 2000H } \\ \text { LOOP : } & \text { MOV A, M } \\ & \text {...
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310
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GATE ECE 2001 | Question: 1.13
An $8085$ microprocessor based system uses a $4 \mathrm{K} \times 8 \text{bit RAM}$ whose starting address is $\text{AA00 H}$. The address of the last byte in this $\text...
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GATE ECE 2001 | Question: 12
Consider the following sequence of instructions for an $8085$ microprocessor based system.$\begin{array}{lll} \text{Memory Address} & \text{Instructions} \\ \text{FF00} &...
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GATE ECE 2002 | Question: 2.13
Consider the following assembly language program.$\begin{array}{rll} \text { MVI } & \text { B,87H } \\ \text { MOV } & \text { A, B } \\ \text { START : JMP } & \text { ...
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330
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GATE ECE 2002 | Question: 12
An $8085$ microprocessor operating at $5 \; \mathrm{MHz}$ clock frequency executes the following routine.$\begin{array}{lll} {\text{START:}} & \text{MOVE} & \text{A,B} \\...
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GATE ECE 1998 | Question 2.6
An $\text{I/O}$ processor control the flow of information betweencache memory and $\text{I / O}$ devicesmain memory and $\text{I / O}$ devicestwo $\text{I/ O}$ devicescac...
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GATE ECE 1998 | Question 2.10
An instruction used to set the carry Flag in a computer can be classified asdata transferarithmeticlogicalprogram control
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GATE ECE 1998 | Question 17
Write a short assembly language program, without using any arithmetic instruction, to store hexadecimal $5D$ in the flag register of $8085$ microprocessor. Data in other ...
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302
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GATE ECE 2003 | Question: 60
In an $8085$ microprocessor, the instruction CMP $B$ has been executed while the content of the accumulator is less than that of register $B$. As a resultCarry flag will ...
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GATE ECE 2004 | Question: 54
The $8255$ Programmable Peripheral Interface is used as described below.An A/D converter is interfaced to a microprocessor through $8255.$ The conversion is initiated by ...
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GATE ECE 2004 | Question: 57
Consider the sequence of $8085$ instructions given below.$\text{LXI H, 9258, MOV A, M, CMA, MOV M, A}$Which one of the following is performed by this sequence?Contents of...
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GATE ECE 2004 | Question: 59
It is desired to multiply the numbers $0 \mathrm{AH}$ by $0 \mathrm{BH}$ and store the result in the accumulator. The numbers are available in registers $B$ and $C$ respe...
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GATE ECE 2005 | Question: 58
What memory address range is $\text{NOT}$ represented by chip $\# \; 1$ and chip $\# \; 2$ in the figure $\text{A}_{0}$ to $\text{A}_{15}$ in this figure are the address ...
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GATE ECE 2005 | Question: 81a
Statement for Linked Answer Questions 81 a and 81 b:Consider an $8085$ microprocessor systemThe following program starts at location $0100 \mathrm{H}$.$\begin{array}{l} \...
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GATE ECE 1995 | Question 1.31
When a $\text{CPU}$ is interrupted, itstops execution of instructionsacknowledges interrupt and branches of subroutineacknowledges interrupt and continuesacknowledges int...
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GATE ECE 1995 | Question 1.34
A $\text{‘DMA'}$ transfer impliesdirect transfer of data between memory and accumulatordirect transfer of data between memory and I/O devices without the use of $\mu p$tr...
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GATE ECE 1995 | Question 1.35
An 'Assembler' for a microprocessor is used forassembly of processors in a production linecreation of new programmes using different modulestranslation of a program from ...
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GATE ECE 1996 | Question 1.13
The total number of memory accesses involved (inclusive of the $op$ – code fetch) when an $8085$ processor executes the instruction $\text{LDA}$ $2003$ is$1$$2$$3$$4$
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