Representation of negative number, Electrical Engineering

Assignment Help:

Representation of Negative Number:

As  mentioned  in chapter 1 in 8085  negative  numbers are represented in 2 complement  form  and subtraction is  performed  using 2  complemented  method.  If the  result of subtraction is negative  it will also  be in 2 complement  form. But  D7 ( left most bit) is used  to indicate sign  of a number. If D7  is 0 the number  is positive  and if D7  is 1  the number is negative D7  is 1 for  2 complement of  all D7 bit  numbers.

Important : Generally  people  have misconnect that the  difference  between a positive  number and a  negative  number is only in  D7.  They assume that if  +5 10 is  written  in 8 bit  binary as 00001012 then -510  can be  written  as 10000102, which  is not  correct.

Refer followings  table  showing various  positive  and negative numbers to understand the concept  of negative  number as used  in microprocessors.

a.All negative numbers have 1 in  their left  most bit positions.

b.All negative  numbers are 2  complement  form  of their  corresponding  positive  numbers.

c. All negative  have their  equivalent positive  decimal number. It is up to the programmer  and the  application that whether  to use it as  negative or positive number.

d.If two numbers are added/ subtracted the  result will be as desired whether is a singed  or unsigned operation. See  followings  example.


Related Discussions:- Representation of negative number

Mr, what is pole core and pole shoe in a dc machine

what is pole core and pole shoe in a dc machine

Circuit board packaging, Topics for the projects 1. Power supply design:...

Topics for the projects 1. Power supply design: One source, multiple source. Project process: 1.  Design(circuit analysis, diagram, list of components). 2.   Hardware e

Overall performance indicator method, Overall Performance Indicator Method ...

Overall Performance Indicator Method Overall Performance Indicator could be derived from a combination of few of the specific core indicators. The way this combination is comm

Full wave rectifiers, how to determine the peak inverse voltage across idea...

how to determine the peak inverse voltage across ideal diodes

Find the voltage, Q. The current sources in Figure are given to be I A = 3...

Q. The current sources in Figure are given to be I A = 30 A and I B = 50 A. For the values of R 1 = 20 ,R2 = 40 , and R3 = 80 , find: (a) The voltage V. (b) The current

Shocly equation, I need to prove of shockly diode equation

I need to prove of shockly diode equation

Determine the speed at which the machine runs as a motor, A 100-kW, dc shun...

A 100-kW, dc shunt generator, connected to a 220-V main, is belt-driven at 300 r/min, when the belt suddenly breaks and the machine continues to run as a motor, taking 10 kW from t

The electrical circuit sign convention, The Electrical Circuit sign convent...

The Electrical Circuit sign convention Notice that current leaves a source at its high potential (positive) terminal but enters a load at its high potential (positive) ter

Singular value decomposition, Singular Value Decomposition (i) initial...

Singular Value Decomposition (i) initialize a 2x2 matrix m=[4 0.5;0.5 7]  Factorize the matrix with SVD [u d v]=svd(m) How the matrix u and v differ? Why is that?

Evaluate the thickness of the shell plate, A cylindrical shell with flat en...

A cylindrical shell with flat ends is of 1.5 m Internal diameter and 4 m length. It is subjected to an internal pressure of 300 N/cm 2 . The principal stress is not to exceed 15 K

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