Compare with register, Electrical Engineering

Assignment Help:

Compare with Register

The contents  of the register  are compared with  the contents  of the accumulator  here  register  may be  any one  of the  A, B, C, D E, H, or L  registers. The instruction format is

CMPR                          (A-R)

Actually the comparison is done  by subtracting  the contents  of the register from the  contents  of the  accumulator. The contents of the  register  and  the accumulator do not  change the  flags  are modified similar  to subtraction.

Flags : All flags  are modified  as they  would  change  in subtract  operation. But the  contents of both the  operand do  not change.

Although  all flags  are modified  but the  conclusion can be made only by CY and Z flag as shown  below

If A> R : CY  and Z flags  are reset.

IF A= R: Z Flag is set and  CY flag is reset.

IF A < R : CY  is set  and Z  flag s reset.

 


Related Discussions:- Compare with register

Define power-supply rejection ratio, Q. Define Power-Supply Rejection Ratio...

Q. Define Power-Supply Rejection Ratio? An op amp's ability to disregard changes in power-supply voltage is measured by the power- supply rejection ratio (PSRR), which is speci

Define the time constant of the circuit, A coil of inductance 0.04 H and re...

A coil of inductance 0.04 H and resistance 10? is connected to a 120 V, d.c. supply. Verify (a)  The final value of current     (b)  The time constant of the circuit (c)

Embedded system, 10. List the three ways in which an RTOS handles ISRs in a...

10. List the three ways in which an RTOS handles ISRs in a multitasking environment

Determine the disadvantages of expert systems, Determine the Disadvantages ...

Determine the Disadvantages of expert systems -  Lacks common sense in some decision making processes -  Errors in the knowledge base can result in incorrect decisions being

Explain working of cardiac pacemaker, Q. Explain working of Cardiac Pacemak...

Q. Explain working of Cardiac Pacemaker? When blockage occurs to the biological signals that stimulate the heart to beat, the application of electric pacemaker pulses forcing t

Level4, What are the three modes of operation of rotating machines

What are the three modes of operation of rotating machines

Operation of an integrating circuit, Q. What is the principle of operation ...

Q. What is the principle of operation of an integrating circuit? The RC integrator is typically a series RC circuit that uses the capacitor to develop its output. Since voltage

Impact of abnormal solar winds on the earth, (a) Provide examples of intent...

(a) Provide examples of intentional electromagnetic sources and examples of unintentional sources. (b) Describe the process of the formation of lightning. (c) Reduce each of

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd