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From: alford@ecsvax.UUCP
Newsgroups: net.micro.cbm
Subject: 1541 drive speedups?
Message-ID: <3377@ecsvax.UUCP>
Date: Fri, 12-Oct-84 20:13:35 EDT
Article-I.D.: ecsvax.3377
Posted: Fri Oct 12 20:13:35 1984
Date-Received: Sun, 14-Oct-84 08:17:20 EDT
Lines: 18

Has anyone seen soft- or hardware that speeds up the data transfer rate
of the 1541 disk drive to something more reasonable?  I have a copy of
the 4 minute disk copy program from Compuserve, and I've timed its track
reads at about 2 seconds, for a data rate of at least 16k bits/sec, if my
arithmetic is right.  In normal operation, the transfer rate is about 2k
bits/sec, slower by a factor of 8!  I would think that whatever the trick
this program uses, it should be possible to modify it for use with a
DOS wedge, or to insert in the 6502 BIOS of C64 CP/M.  This program
definitely reprograms the disk drive.  I'd think that if it could be
done once, some clever person out there would have done it again, or
at least have disassembled the 4 minute program to see how it works.
C64 CP/M would be genuinely usable with an 8x disk speedup.  I could
send a hex version of this file to anyone who's interested in looking
at it.  Please reply if you've heard of anything along these lines.
Thanks,

Ross Alford
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