Flag registers , Electrical Engineering

Flag Registers

Flag  register  is also an  8 bit  register. Out of 8 bit  five are  defined as flags to indicate status  of the accumulator  hence it is also called status register. Flags are  flip  flops  which  can be set or reset.  After  any arithmetical logical  operation some or all flags  are modified according  to the  result  to the   operation. Flag  register  showing  the bit  position  reserved  for various flag  as shown in figure .

917_Flag Registers.PNG

                                                 The Flag Register

The five  flags are sign  flag  (A) zero flag (Z) auxiliary  carry flag (AC) parity flag  (P)and carry  flag(CY).

Important : Flags are  modified  only after any  arithmetical  or logical operation is  performed.

 

 

Posted Date: 4/4/2013 2:33:22 AM | Location : United States







Related Discussions:- Flag registers , Assignment Help, Ask Question on Flag registers , Get Answer, Expert's Help, Flag registers Discussions

Write discussion on Flag registers
Your posts are moderated
Related Questions
What is the desirable properties of an insulation material? Insulation materials have the desirable properties are as follows: 1. Very fine dielectric strength such as of mi

Transparent latch D flip  Flop A typical  example  of this  type of D flop  is 7475 shown  in figure when CLK  connected is enable signal is high and the flip  flop  is enabled

Q. Sections construct in FORTAN? The sections construct is a no iterative work sharing construct which causes structured blocks to be shared among threads in team. Every struct

Difference between linear and non-linear resistors

Explain frequency selective wave analyser with bandwidth

Objective of Long-Term Plans for Technical Loss Reduction The primary objectives of strengthening and improvement of sub-transmission and distribution system in the long-term

Explain RS232C Standard. RS232C: 1. Standard described for asynchronous communications where there is given timing among data bits and no fixed timing among the characters

1. The voltage across a 1 - μF capacitor is given. Which is the sinusoidal expression for the current? a) 30 sin200t b) 70cos (800t - 20°) 2. At what frequency will the re

What are the basic modes of operation of 8255? There are two basic modes of operation of 8255, viz. 1. I/O mode. 3. BSR mode. In I/O mode, the 8255 ports work as progr

Electronic signals are used by almost all measurement and control systems to transfer information. Much of this data is in the form of analogue voltages, which are prone to the ef