Digital Electro...

In a memory map the lowest address of an 8 k byte RAM is 1000 H. What is the highest address?

A single instruction to clear the lower four bits of the accumulator in 8085 assembly language is:

How many times will the following loop be executed?

XRA A

MVI C 14 H

Loop: DCR C

JNZ Loop

A 3 × 8 decoder with two enable inputs is to be used to address 8 blocks of memory. The size of each memory block when addressed form a sixteen bit bus with two MSBs used to enable the decoder will be _________ kB

The following 8085 instructions are executed sequentially.

LDA      C200 H

MOV     E, A

LDA      C201 H

MOV    C, A

MVI      D, 00H

LXI        H, 0000 H

LOOP:        DAD    D

                   DCR    C

                   JNZ     Loop

                   SHLD  C300 H

                   RST 1

The following is an assembly language program for 8085 microprocessors:

When this program halts; the accumulator contains

8-bit signed integers in 2’s complement form are read in to the accumulator of an 8085 microprocessor from an I/O port using the following assembly language program segment with symbolic addresses.

BEGIN: IN PORT

RAL

JNC BEGIN

RAR

END     HLT

This program