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

Sketch ro versus vgs, Q. Sketch g m versus v GS for a JFET with I DSS = ...

Q. Sketch g m versus v GS for a JFET with I DSS = 10 mA, V P = 3V, V A = 100 V, and v DS = 10 V. See what happens if V A →∞. Also sketch r o versus v GS .

Production of rotating fields from single-phase windings, Production of Rot...

Production of Rotating Fields from Single-Phase Windings In this subsection we show that a single-phase winding carrying alternating current produces a stationary pulsating flu

Draw the logic diagram of an sr latch, Q. Draw the logic diagram of an SR l...

Q. Draw the logic diagram of an SR latch using only NAND gates, and obtain the truth table for that implementation.

Explain the magnetisation- curves of magnetic materials, Explain the magnet...

Explain the magnetisation- curves of magnetic materials. The major characteristic of a ferromagnetic substance is domain structure of it. Every crystal of a ferromagnetic subst

Compute number of electrons and find their average velocity, Q. A wire with...

Q. A wire with n = 10 30 electrons/m 3 has an area of cross section A = 1mm 2 and carries a current i = 50 mA. Compute the number of electrons that pass a given point in 1 s, an

Principle of oscillation in an rc phase shift oscillator, Q. What is the ba...

Q. What is the basic principle of oscillation in an RC phase shift oscillator. With a neat sketch explain its working? For producing oscillations there must have positive feedb

Electronic monitor and alarm system for an oil separator, This assignment i...

This assignment is to develop a User Requirements Specification for an electronic monitor and alarm system for an Oil Separator in Surface Water Drainage Systems. These separato

Illustrate bcd-to-decimal decoding, Q. Illustrate BCD-to-decimal decoding w...

Q. Illustrate BCD-to-decimal decoding with a 4-to- 16 decoder, and draw the corresponding truth table.

Metal oxide field effect transistor, Metal Oxide Field Effect Transistor ...

Metal Oxide Field Effect Transistor The metal-oxide-semiconductor field-effect transistor (MOSFET/MOS-FET/MOS FET) is a device employed for amplifying or for switching electr

Find the overall current drawn from the supply, Q. A single-phase industria...

Q. A single-phase industrial plant consists of two loads in parallel: P1 = 48kW PF1 = 0.60 lagging P2 = 24kW PF2 = 0.96 leading It is operated from a 500-V, 60-Hz source.

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