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

Ldax load accumulator indirect instruction , LDAX  Load Accumulator Indire...

LDAX  Load Accumulator Indirect Instruction This instruction is used to copy data  from memory  location pointed by register  pair only  BC or DE  to the accumulator  HL pair

A.c. machines-the single phase alternator, The single phase alternator ...

The single phase alternator   The underlined italicised terms in the following text identifies terms that you should understand and remember. The simple two pole generator

Knowledge of science and engineering fundamentals, Knowledge of science and...

Knowledge of science and engineering fundamentals Knowledge of basic science and engineering fundamentals is necessary for engineers to develop solution to any complex problem

Diode, report on diode

report on diode

Potentiometer, how can yuo calculate voltage,curent basing on the meter bri...

how can yuo calculate voltage,curent basing on the meter bridge?

What is extended data output ram, What is extended data output RAM? EDO...

What is extended data output RAM? EDO RAM: A slight modification to the DRAM structure changes the device in an EDO (extended data output) DRAM device. Inside the EDO memory, a

Find fmax for circuit, Q. (a) An audio amplifier with R i = 10 k, R o ...

Q. (a) An audio amplifier with R i = 10 k, R o = 0, and ¯A(ω), as shown in Figure (a), is used in the circuit shown in Figure with R S = 1 k,R L = 16 , and C = 0.2 µF. Sk

The fundamental frequency , The frequency domain representation of a signal...

The frequency domain representation of a signal is shown  below: i. What are the fundamental frequency and the corresponding period of this signal (shown in Figure )? ii.  Pl

RLC, a 49pf cap,a 50 uH inductor, and a 100 ohms resister are in parallel: ...

a 49pf cap,a 50 uH inductor, and a 100 ohms resister are in parallel: what is the resonance freq? And what is the complex impedance vector at 100MHZ?

List few applications of microprocessor-based system, List few applications...

List few applications of microprocessor-based system. It is used: i. For measurements, display and control of current, voltage, temperature, pressure, etc. ii. For traff

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