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.

Posted Date: 5/4/2012 7:44:44 AM | Location : United States

Ask an Expert

Related Discussions:- Introduction to FCB , Assignment Help, Ask Question on Introduction to FCB , Get Answer, Expert's Help, Introduction to FCB Discussions

Write discussion on Introduction to FCB
Your posts are moderated

Write your message here..

Related Questions

File management, File Management:   The concept of a file is central t... File Management:   The concept of a file is central to the effective use of a computer system. A file is generally loosely defined as a collection of related information such

CAI, what is CAI? explain its pitfalls. what is CAI? explain its pitfalls.

Deadlock , My question on the following link: http://www.3n33.com/upload/d... My question on the following link: http://www.3n33.com/upload/download.php?img=1410

What are the characteristics of a good documentation?, Question 1 What are... Question 1 What are the differences between closed and open systems? Question 2 What are the characteristics of a good documentation? Question 3 What are the steps invol

Probability, 2. Mike sells on the average 15 newspapers per week (Monday – ... 2. Mike sells on the average 15 newspapers per week (Monday – Friday). Find the probability that 2.1 In a given week he will sell all the newspapers [7] 2.2 In a given day he w

Nano programing, Nano programming using microcontrol and circuits Nano programming using microcontrol and circuits

Excel, Your next step is to analyze "proposed" technical requirements/specs... Your next step is to analyze "proposed" technical requirements/specs based on the business requirements (new performance needs) for Big Bucks. 1.Create a "CRUD" Matrix in an Exce

Specify the steps to creating a powerpoint presentation, FUNDAMENTALS OF CO... FUNDAMENTALS OF COMPUTERS 1. Describe the importance of video in multimedia. What are some of the tips to keep in mind while making video for the web? 2. Specify the steps t

Flowchart, create a flowchart showing average score for the 3 quizzes assum... create a flowchart showing average score for the 3 quizzes assume that there are 3 sections each having 5 students the only valid number to be entered is 1-100 for the quizzes shou

Printers, Printers: Printers: Printers exist in a variety of forms:  ... Printers: Printers: Printers exist in a variety of forms:  Line Printers: These have been widely used for many years in large computer installations. They are design