Introduction to FCB , Basic Computer Science

Assignment Help:
There are two kinds of FCB, the normal, whose length is 37 bytes and the
expanded one of 44 bytes.
The FCB is created of data given by the programmer and by
data which it takes directly from the operative system.
When these types of files are used it is only achievable to work on the current
directory since the FCBs do not give sport for the use of the organization by directories of DOS.
The FCB is created by the following fields:
POSITION LENGTH sense
00H 1 Byte Drive
01H 8 Bytes File name
09H 3 Bytes Extension
18H 8 Bytes Reserved
20H 1 Bytes Current register
21H 4 Bytes Random register
0CH 2 Bytes Block number
0EH 2 Bytes Register size
10H 4 Bytes File size
14H 2 Bytes Creation date
16 H 2 Bytes Creation hours
To choose the work drive the next format is followed: drive A = 1; drive B
= 2; etc. If 0 is used the drive life form used at that instant will be taken as
option.
The name of the file must be defensible to the left and for fear that it is
essential the remaining bytes will have to be filled with gaps, and the
extension of the file is placed the same method.

Related Discussions:- Introduction to FCB

Problem occurs during pipelining , While pipelining can cruelly cut the tim...

While pipelining can cruelly cut the time taken to execute a program, there are troubles that cause it to not work as well as it possibly shall. The three stages of the instruction

Browser cookies, Browser Cookies: A cookie is a small message sent by ...

Browser Cookies: A cookie is a small message sent by the Web server to a your web client. This message is stored by the browser as a text file. The basic purpose of cookie is

Perverse software, is u given is enough for us for this - what is pervere ...

is u given is enough for us for this - what is pervere software and explain in detail?

Data transmission, #quesetion..explain the concept of data transmission giv...

#quesetion..explain the concept of data transmission giving details of the transmission rate and bandwidth with details explanation of the transmission media

Binary codes, Binary Codes: We have seen earlier that digital computer...

Binary Codes: We have seen earlier that digital computers use signals that have two distinct values and there exists a direct analogy between binary signals and binary digits.

Data communication , (iv) Suppose that the TCP entity receives a 1.5 megaby...

(iv) Suppose that the TCP entity receives a 1.5 megabyte file from the application layer and that the IP layer is willing to carry blocks of maximum size 1500 bytes. Calculate the

Algorithms and flowcharts, 1. Write an algorithm and draw a flowchart to ac...

1. Write an algorithm and draw a flowchart to accept the names and gross salary of 5000 employees and to generate the net pay. If the gross salary is greater than N 50,000 declare

Omputer applications 2, true or false-- most designs of a desktop publishin...

true or false-- most designs of a desktop publishing document needs to follow clear, specific rules pertaining to design

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