Define com programs, Computer Engineering

Assignment Help:

Q. Define COM Programs?

A COM (Command) program is binary image of a machine language program. It is loaded in memory at the lowest available segment address. Program code starts at an offset 100h, the first 1K locations being occupied by IVT.

A COM program keeps itsdata, code and stack segments within same segment. Because the offsets in a physical segment can be of 16 bits hence size of COM program is limited to 216 = 64K that involvesdata, code and stack. The subsequent program displays a COM program:

; Title add two numbers as well as store result and carry in memory variables.

; name of segment in this program is chosen to be CSEG


Related Discussions:- Define com programs

4 bit comparator, how to breadboARD THE 4 BIT COMPARATOR

how to breadboARD THE 4 BIT COMPARATOR

What is dom, DOM is the Document Object Model (DOM) which is an interface s...

DOM is the Document Object Model (DOM) which is an interface specification handled by the W3C DOM Workgroup that explains an application independent mechanism to access, parse, or

First-order inference rules, First-Order Inference Rules: Here now we ...

First-Order Inference Rules: Here now we have a clear definition of a first-order model is that we can define soundness for first-order inference rules in the same way such we

Data hazards in computer architecture, Data hazards -  computer architec...

Data hazards -  computer architecture : A main effect of pipelining is to alter the relative timing of instructions by overlapping their execution. This introduces contro

Illustrate about 8259, Illustrate about 8259 8259A adds 8 vectored pri...

Illustrate about 8259 8259A adds 8 vectored priority encoded interrupts to the microprocessor. We can expand it to 64 interrupt requests by using one master 8259A and 8 slave

Design an or to and gates combinational network, Design an OR to AND gates ...

Design an OR to AND gates combinational network and NAND only n/w for the following Boolean expression: A'BC'D + ABC'D' + A'B'CD' + A'BCD'

How do the registers help in instruction execution, Q. How do the registers...

Q. How do the registers help in instruction execution? We will discuss this in following steps: Step 1: First step of instruction execution is to fetch instruction which

Describe the instruction set architecture, Q. Describe the instruction set ...

Q. Describe the instruction set architecture? The significant role of the Central Processing Unit (CPU) is to perform calculations, to coordinate all other hardware components,

Explain criteria for choosing type of file organization, What criteria shou...

What criteria should be adopted for choosing type of file organization. Selecting a file organization is a design decision; therefore it must be done having in mind the achieve

Define system space, Define system space.  Management routines are part...

Define system space.  Management routines are part of the operating system of the computer. It is suitable to assemble the OS routines into a virtual address space.

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