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Features of Your System
The most important use of the disk system is storage and retrieval of information via TI
BASIC programs. Through the proper BASIC commands. you can:
SAVE PROGRAMS - Each single-sided diskette holds over 720.000 bits
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of information. while a double-sided diskette holds over 1 .440.000 bits of
information. As an example. you can store about 1 00 BASIC programs.
each 50 lines long. on a single-sided diskette.
STORE AND RETRIEVE DATA - You can store data that is
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accumulated when your programs are run. One single-sided diskette can
hold about 90.000 characters. and a double-sided diskette can hold twice
as many characters.
UPDATE DATA - Through a BASIC program. you can update the infor-
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mation in your files so that they contain the latest. most accurate data.
The Disk Manager Command Module can also be used to maintain information about
the diskettes. such as the name of the diskette and the names of the files. Using the
Disk Manager module you can:
INITIALIZE DISKETTES - Initialization prepares diskettes for use by the
•
system. The routine provides the diskette with header information for each
sector. Note: New diskettes must be initialized before they can be used.
NAME DISKETTES - Each diskette is given its own name. so that the
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computer can verify that the proper diskette is in place.
RENAME. DELETE. AND COpy FILES - These functions also can be per
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formed via TI BASIC; however. the Disk Manager Command Module helps
you quickly and easily rename files. delete files. and make copies of files.
MODIFY PROTECTION - You may want a file protected so that it
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cannot be aCcidentally erased or changed. You can use the Disk Manager
Command Module to protect files and. when you want to change them.
to release them from protection.
COPY DISKETTES - DIskettes are a very reliable storage medium.
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However. unner cert.a\n
be totally or partially lost. For instance. if electrical power fails while the
disk drive is writing on a diskette. some data could be lost. To protect
your data. it is customary to make backup diskettes. The Disk Manager
module makes it easy to copy diskettes for backup even if you have only
one disk drive .
PERFORM TESTS - To ensure that the disk system is operating
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correctly. the Disk Manager Command Module offers two different tests .
The first checks several general areas to see that things are as they
should be. The second is an exhaustive test. At the end of the tests. all
data on the diskette may have been removed. Before testing a diskette.
be sure to make a back-up copy; this test overwrites all of the data on
the diskette.
Certain other Command Modules aiso operate with the disk system to save and load
your data. See the manuals for each module for further information.
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the data stored on a diskette can
c\Ic�-m ... �ce ... .
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