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From: borgia@cwruecmp.UUCP (The Prince)
Newsgroups: net.micro.pc
Subject: Re: DOS 2.1 Floppy Disk Speed-up
Message-ID: <1169@cwruecmp.UUCP>
Date: Sat, 26-May-84 16:39:21 EDT
Article-I.D.: cwruecmp.1169
Posted: Sat May 26 16:39:21 1984
Date-Received: Sat, 2-Jun-84 08:47:43 EDT
References: <7540@lanl-a.UUCP>
Organization: CWRU Computer Engr. Cleveland, Ohio
Lines: 24

Changing the disk parameters appears to be very very sticky...
I modified the table in RAM (taking tips from Norton and the net).
Then I discovered that the table is reset the moment you exit the
program that changed it (Debug or Basic). I figured it is reloaded
from the disk every time.

After some hacking, I discovered the hex string for the parameters
on the boot sector (!!) and also in format.com (obviously). So I used
utilities to patch the boot record. I even patched format.com and 
tried a newly formatted diskette.

The result? The parameters get reset to the same old values. Apparently
the disk parameters are controlled from ROM or somewhere I can't reach.
I have not seen the parameter string in either BIOS or DOS.

I would reaaly appreciate if someone who has really speeded up the
disk will post the solution to this. Thanx

--joe

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