1 Nov
2001
1 Nov
'01
1:23 p.m.
I saw a couple of those Commodore 1541 or so disk drives at the thrift store the
other day. Are they of sufficient interest that someone might want one?
Dick
----- Original Message -----
From: "Cameron Kaiser" <spectre(a)stockholm.ptloma.edu>
To: <classiccmp(a)classiccmp.org>
Sent: Thursday, November 01, 2001 7:50 PM
Subject: Re: hard-sector 5 1/4 disk
http://www.armory.com/~spectre/ --
This time I
think I can say without making an a%% of myself that Commodore
also did that from day one; most if not all their drives had CPU's to handle
the IEEE interface ...
All 8-bit Commodore disk drives have CPUs, period, IEEE or no. Some older
drives have two, one for "IP" to accept commands over the Commodore serial
bus and one to act as FDC. 1541s and later drives have "schizophrenic" CPUs
that alternately switch between IP and FDC modes on interrupts. MFM-capable
drives like 157xs and 1581s have a special FDC (usually WD-1770 or 1772-type
controllers).
--
----------------------------- personal page: Cameron Kaiser, Point Loma Nazarene University *
ckaiser(a)stockholm.ptloma.edu
-- MOVIE IDEA: The Never-Ending E-mail
Signature ------------------------------