Cisc characteristics-microprocessor, Assembly Language

CISC Characteristics :

The design of an instruction  set for a computer  might take into consideration  not only machine language constraints,  but  also  the  requirements  imposed  on  the  use  of  high-level  programming  languages.  The translation from high-level to machine language programs is done by means of a compiler program. One cause for the trend to provide a complex instruction set is the desire to simplify the compilation and improve the overall computer performance.  The task of a compiler is to produce a sequence of machine instructions for each high-level language statement. The job is simplified if there are machine instructions that implement the statements directly. The important aim of CISC architecture is to attempt to provide a single machine instruction for each statement that is written in a high-level language .An Examples of CISC architectures are the Digital Equipment Corporation VAX computer and the IBM 370 computer.

The main characteristics of CISC architecture are:

1. A large number of instructions-usually from 100 to 250 instructions.

2. Some instructions that perform specialized tasks and are used infrequently.

3. A vast variety of addressing modes-typically from 5 to 20 different modes.

4. Variable-length instruction formats.

5. Instructions that manipulate operands in memory.


Posted Date: 10/10/2012 12:49:07 AM | Location : United States

Related Discussions:- Cisc characteristics-microprocessor, Assignment Help, Ask Question on Cisc characteristics-microprocessor, Get Answer, Expert's Help, Cisc characteristics-microprocessor Discussions

Write discussion on Cisc characteristics-microprocessor
Your posts are moderated
Related Questions
DEC : A powerful new Alpha 64 bit RISC computer chip was introduced in the year 1977, as new VAX (Virtual Address Extension) Computer. The VAX was 32 bit computer line based on

DQ:   Define  Quad word:-  This directive is taken in use to direct the assembler to reserve 4 words (8 bytes) of memory for the specified variable and can initialise it having

RISC Characteristics : The  concept  of  RISC  architecture  include  an  attempt  to  reduce  execution  time  by make  simple  the instruction set of the computer. The main c

Write an assembly language program that will display (print) a list of the Decades 2010, 2020, 2030... 2100 to the screen using a while loop.

Write a program that defines symbolic constants for all of the days of the week

The real time System (RTS) : Calling the clock real-time is somewhat of a misnomer because it only shows the time setting it has been given. The RTC is the other half of chip

to separate positive and negative numbers

Open notepad and enter the code for a program that calculates the following arithmetic expression: x = a + b + c - d - e + f The operands a, b, c, d, e, f, and x should be declared

Linking a program The DOS linking program LINK.EXE links the different object modules of function library routines and source program to produce an integrated executable code o