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1987-05-18
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63 lines
Two South Spring Street
Concord, NH 03301-2424
May 18, 1987
Public Brand Software
P.O. Box 51315
Indianapolis, IN 46521
Re: Software order
Entry in Public Domain Contest
Gentlemen:
Please process the enclosed order as soon as possible. By the way, I appreciate the service that you folks
provide. It encourages honesty by users, and encourages programmers to write more programs!
Speaking of writing programs, I have one which I would like to submit for your "3rd Public Brand Software Public
Domain (and User Supported) Software Contest." It is called "IAU.EXE", which stands for "Interleave Adjustment
Utility." I have tested it on several manufacuters' machines, including IBM's AT and XT, Commodore PC-10, Zenith
Z-200 series, Honeywell, and one of the Compaq machines.
As you may know, the interleave setting affects hard disk performance. Normally, to change the setting, you must
erase all of your data which is on your hard disk. My program keeps all of the data there, which eliminates the
possibility of problems during backup or restore. The method for doing this is as follows:
Read one entire track into memory.
Format that track with the new interleave value.
Write the original data back out in the new format.
Repeat for the entire disk.
The program is written in 'C', except for some low-level routines which work better when coded in assembly
language. I have included it on this disk for your perusal.
There are a few "DOC" files which need to be present with the software so that the help screens work. They are
DOC files so that womeone can PRINT them if so desired. They can be modified in case the user wants the program
to give different help messages.
"I am the author of this program and intend it to be freely distributed so long as the copyright notice is not
altered in any way."
By the way, I would be glad to make the source code available along with the .EXE file, since I think that the
novelty of this program is its "Read-Format-Write" function. There are no real "tricks" in the code itself --
instead, the trick is in its execution, which could be duplicated once the method is realized.
Please notify me if you need any additional information.
Regards,
Dave Bushong