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

What do you mean by most and least significant digits, Q. What do you mean ...

Q. What do you mean by Most and least significant digits? The MSD (most significant digit) in a number is the digit which represents the largest part of the number. Therefore i

Fabrication and testing laboratory, You will manufacture composite beams us...

You will manufacture composite beams using an epoxy matrix (West Systems 105 epoxy resin + West Systems 206 slow hardener) and one of the following reinforcements:  1.  Unidirec

Show a schematic diagram of the seven- segment decoder, Q. Digital watches ...

Q. Digital watches display time by turning on a certain combination of the seven-segment display device. (a) Show a typical seven-segment display. (b) Develop a truth table f

Perfect gases avogadro''s hypothesis, Equal volumes of all gases contain th...

Equal volumes of all gases contain the samenumber of molecules when the volumes are measured at the same p and T. Therefore for a given volume at the same p and T, with the same

Load carrying capacities , Task a)    Investigate and describe the sign...

Task a)    Investigate and describe the significance of the following: i.    Slenderness ratio and buckling in columns ii.    Effective length of columns b) Explain Eu

D flip-flop - latch or delay element, Q. D flip-flop - latch or delay eleme...

Q. D flip-flop - latch or delay element? The symbol for the clocked D flip-flop is shown in Figure (a), in which the two output terminals Q and ¯ Q behave just as in the SRFF,

Input output operations , Input Output Operations Many times microproc...

Input Output Operations Many times microprocessor has to  accept data  from input port and send data to  output  port to  interact with the  real world. Input  port is  tri st

Schrodinger’s wave equation, Discuss the degeneracy of energy of energy sta...

Discuss the degeneracy of energy of energy states. Solve the Schrodinger’s equation for a free particle in three dimensional boxes and find Eigen values and Eigen function of free

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