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

C programming, input is n positive numbers and reverse it, out put gv the a...

input is n positive numbers and reverse it, out put gv the absolute difference and give the reverse(magic number),using function reverseinteger, and function generate magicnumber

Counters and registers, design a synchronous, recycling, MOD-12 counter wit...

design a synchronous, recycling, MOD-12 counter with D FF''s. Use the states 0000 through 1011 in the counter.

Login, Login Because the information on a network is sharable, network...

Login Because the information on a network is sharable, networks are very susceptible to unauthorized intruders. In order to prevent unauthorized access to use the services o

Generations of computers, Ask question #Minimum assignment on generations o...

Ask question #Minimum assignment on generations of computers 100 words accepted#

Computerised systems, Computerised Systems : You would have realized by no...

Computerised Systems : You would have realized by now that computing systems are most useful for manipulating information. Any organisation and management of information basically

Knowledge of the environment of ai system, Knowledge of the Environment ...

Knowledge of the Environment We must distinguish between knowledge an agent receives through it's sensors and knowledge about the world from which the input comes. Knowledge a

Immediate addressing, These addressing modes are: With immediate addressing...

These addressing modes are: With immediate addressing, no lookup of data is essentially required. The data is located in the operands of the instruction itself, not in a different

What is nanp? explain, Question 1 What is NANP? Explain Question 2 ...

Question 1 What is NANP? Explain Question 2 What is E&M signaling? Discuss in brief Question 3 What are the common custom calling features? Question 4 Expl

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