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 shifting and reversing – linear system, Define Shifting and Reversin...

Define Shifting and Reversing – Linear System? The signal x[n - m] is said to be time-shifted by m samples, where m is an integer. If m is positive, the shift is to the right (

Electrical, star delta drawing with timer

star delta drawing with timer

Active-mode npn transistors in circuits, Active-mode NPN transistors in cir...

Active-mode NPN transistors in circuits Figure:  Structure and use of NPN transistor. Arrow according to schematic. The figure opposite is a schematic presentation

Explain the signals hold and sid, Explain the signals HOLD, READY and SID ...

Explain the signals HOLD, READY and SID HOLD indicates that a peripheral such as DMA controller is requesting the use of address bus, data bus and control bus. READY is used to

Role of consumers in distribution reform, Role of Consumers in Distribution...

Role of Consumers in Distribution Reform In the reforms procedure, mandatory metering for all consumers is being implemented.  Consumers should implement this measure. Public

What is dual tone multi frequency, Q What is Dual Tone Multi Frequency? ...

Q What is Dual Tone Multi Frequency? Dual Tone Multi Frequency (DTMF) was first introduced in 1963 with 10 buttons in Western Electric 1500 -type telephones. DTMF was originall

Design a multiplexer and anomalous signals, 1. The size of the multiplexer ...

1. The size of the multiplexer used to implement a truth table can be cut in half (e.g. 4 inputs instead of 8) if one of the variables is used as an input instead of being connecte

Primacy of mosfet, Primacy of MOSFET In the year 1959, Dawon Kahng an...

Primacy of MOSFET In the year 1959, Dawon Kahng and Martin M. (John) Atalla at Bell laboratory invented the MOSFET. Operationally and structurally diverse from the bipolar ju

Digital electronics, Digital Electronics: We have study the fundamenta...

Digital Electronics: We have study the fundamentals of Digital circuits. Primary we have studied the mathematics of Binary numbers also called as Boolean algebra and how to im

Explain the action of a pn-junction with bias, Q. Explain the action of a p...

Q. Explain the action of a pn-junction with bias. Consider both the forward bias and the reverse bias, and use sketches wherever possible.

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