Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!S55.Prime.COM!CUMMINGS
From: CUMMINGS@S55.Prime.COM (Kevin J. Cummings)
Newsgroups: comp.os.cpm
Subject: Re: 3.5" on 8" Controller?
Message-ID: <9004110707.AA07305@ucbvax.Berkeley.EDU>
Date: 10 Apr 90 22:30:40 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 26

A long time ago (years) California Digital (a clearing house for dis-continued
products and bargins) sold a 5.25" disk drive that they claimed was an 8"
drive electrically.  I assumed that this means that it had the same electrical
interface (did that mean the same edge card connector wired the same way) as
an 8" drive did.  I remember that the 8" drives used a 50 pin daisy chained
cable, while the 5.25" drives used a 34 pin cable (basically the same signals,
a few were different, in different places on the cable.  I'm running 720K
3.5" drives on the same cable as my 40 and 80 track 5.25' drives (using the
same disk controller).  I have nothing on my 8" controller (never bought
any 8" drives B^).  I always wondered if I could add a HD 5.25 1.2MB drive
on the 8" controller?  My 1.2MB drive on my IBM-compatible PC is hooked to
the same 34 pin connector as my 720K 3.5" drive.  That sorta says no.  Anyone
successfully run a 1.2MB drive on an 8" controller?

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Kevin J. Cummings                       Prime Computer Inc.
20 Briarwood Road                       500 Old Connecticut Path
Framingham, Mass.                       Framingham, Mass.

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Std. Disclaimer: "Mr. McKittrick, after careful consideration, I've come
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