Assembler directives and operators-microprocessor, Assembly Language

Assignment Help:

Assembler Directives and Operators

The major advantage of machine language programming is directly that the memory control is in the hands of the programmer, so that, he can be able to manage the memory of system more capably. Or else, the disadvantages are more. The coding, programming and resource management techniques are tiresome. The programme has to take care of the all these functions therefore the probability of human errors are more. The programs are hard to understand unless one has a thorough technical knowledge of instruction set and processor architecture.

The assembly language programming is simple as comparison of machine language programming. The instruction mnemonics are written in the assembly language programs directly. Now the programs are more readable for users than machine language programs. The major improvement in assembly language over the machine language is that the address values and the constants may be recognized by labels. If the labels are indicative, certainly then the program will become more understandable, and every time the programme will not have to bear in mind the different constants and addresses at which they are stored, throughout the programs. The labels might help to recognize the constants and addresses. Due to this service, the tedious byte handling and manipulations are got rid of. In similar manner, now different routines and logical segments might be assigned with labels rather than the different addresses. The memory control feature of machine language programming is not changed by providing storage define facilities in assembly language programming. The documentation facility that was not possible with machine language programming is now available in the assembly language.

An assembler is a program utilized to convert an assembly language program into the corresponding machine code modules which can further be converted to executable codes. Assembler decides address of each substitute and labels the values for each of the variables and constant. Then it forms the machine code for thedata and mnemonics in the assembly language program. Whilst doing these things, the assembler might find out syntax errors. The logical errors and others programming errors are not found out by the assembler. For finishing all these tasks) an assembler needs some hints from the programmer, for example: the need of the storage for a specific a variable or constant, types of the different routines ,logical names of the segments and modules, end of file, etc.  These  types  of hints  are  given  to  the assembler by using some  predefined alphabetical strings called assembler directives. Assembler directives help the assembler to properly understand the assembly language programs to prepare the codes.

Another type of hint which helps the assembler to assign a specificconstant witha label or initialise specific memory locations or labels with constants is called an operator. Rather than the operators perform and logical and the arithmetic tasks unlike directives that just direct the assembler to properly interpret the program to code it well. Following directives are commonlyused in the assembly language programming practice by using Turbo Assembler or Microsoft Macro Assembler.

 


Related Discussions:- Assembler directives and operators-microprocessor

General terms for cache-microprocessor, General terms for Cache : Cac...

General terms for Cache : Cache Hits : When the cache consisted the information requested, the transaction is said to be a cache hit. Cache Miss : When the cache does n

Program to perform a conversion on characters in a text file, Write an asse...

Write an assembly language program to perform a rot13 1 conversion on characters in a text file.  The program should read charatcers from the input file, perform the rot13 convers

8279 keyword /display controller-microprocessor, 8279 Keyword /Display Cont...

8279 Keyword /Display Controller : Figure shows the structure of 8279 and its interface to the bus. Addressing is according to the table given below. CS        RD

String manipulation instruction-microprocessor, String Manipulation Instruc...

String Manipulation Instruction A series of words or data bytes are available in memory at consecutive locations, to be mention to individually or collectively, are known as by

Code for reading flow & generating serial output, Assembly Code for Reading...

Assembly Code for Reading Flow & Generating Serial Output The timer is timer 1 is set for the baud rate 9600, as the crystal used is of 11.0592 Hz.  Then the timer 1 is starte

Embeded programming, i want to develop traffic light system so which kind o...

i want to develop traffic light system so which kind of software is needed to develop this project?

Project, I need some guidance on which project to make in assembly language...

I need some guidance on which project to make in assembly language

Adc-arithmetic instruction-microprocessor, ADC: Add with Carry:- This instr...

ADC: Add with Carry:- This instruction performs the similar operation a like ADD instruction, but adds the carry flag bit (which might be set as a result of the previous calculatio

Memory interface-microprocessor, Memory Interface              ...

Memory Interface                                                                  Figure: Memory Modulation design The memory of a computer contain of number of memo

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