RVUNL EE Microprocessor & Microcontroller Quiz 2

In the instruction DCR and INR, which of the following flag bit is not affected?

What is the RST for the TRAP and what is address of it?

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 __________

Consider the assembly language program given below
1) MVI A, 00 H
2) STC
3) CMC
4) DCR A
5) RAL
6) OUT PORT 2
7) HLT
If the above program is executed in 8085 then output at PORT 2 is

A main memory unit with a capacity of 4 MB is built using 1M x 1-bit DRAM chips. Each DRAM chip has 1K row of cells with 1K cells in each row. The time taken for a single refresh operation is 100 nsec. The time required to perform one refresh operation on all the cells in the memory unit is

The program given below is run on an 8085 based microcomputer system. Determine the contents of the registers SP and C after a halt instruction is executed

2000 H :LXI SP, 1000 H

LXI H, 2F37 H

XRA A

MOV A, H

INX H

PUSH H

CZ 20FF H

JMP 3000 H

HLT

20FF H :ADD H

RZ

POP B

PUSH B

RM

3000H :HLT