GATE 2023 Computer Organization & Architecture Quiz 12

The contents of the accumulator after the execution of the following instructions in 8085 is?

MVI A, 95H

ANI F0H

RLC

RLC

The ALU Uses ______ to store intermediate result.

Assume that

ADD x, y, z; denotes x ← y + z,

SUB x, y, z; x ← y – z 

MUL x, y, z; denotes x ← y ∗ z.

Consider the following assembly code.

I1: SUB R1,R2,R3

I2: ADD R2,R1 R3

I3: ADD R3 R1 R2

I4: SUB R1 R2 R2

Find the number of RAW dependencies in the above assembly code.

Consider the term “RET instruction” & choose which statement is not correct.

In a hypothetical RISC CPU, 50 registers windows are overlapped. The Processor contains 20 global registers, 50 local registers,  and  10 In and Out registers each.

What is the register window size?

The below given program is executed by 8085 microprocessor

ANI 00H

LXI, FFFFH

LOOP: DCX B

NOP

JNZ LOOP

HLT

The number of times NOP will be executed is __________