Path: utzoo!mnetor!uunet!husc6!mailrus!nrl-cmf!ames!pasteur!ucbvax!RADC-LONEX.ARPA!koziarzw
From: koziarzw@RADC-LONEX.ARPA
Newsgroups: comp.sys.zenith.z100
Subject: (none)
Message-ID: <8803281205.AA28625@radc-lonex.arpa>
Date: 28 Mar 88 12:05:38 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 33

Mail to:	Date: Mon Mar 28 07:05:15 1988
From: koziarzw@radc-lonex.arpa
Sender: koziarzw@radc-lonex.arpa
Subject:	5.25 Quad on Z-207 Floppy Controller
cc:		info-hz100@radc-tops20.arpa
Message:

Mike:

It is indeed possible to do this.  An article appeared in 'Sextant' last
year detailing the addition of two 5.25 quad density (96 tpi) drives to a
Z-100.  This article delt with ADDITION of these drives NOT REPLACEMENT of
the original 48 tpi drives.  The author indicated no major problems.  A minor
change to the bios was required to perform his modification.  He assigned
logical drive name 'C' and 'D' to the new 96 tpi drives and re-assembled
his bios (something not easily done if your I(nferior) B(ut) M(arketable)
machine has its bios cast in stone, i.e. ROM bios).  This reassignment was
done because the author felt he was more likely to add a winchester than
to add 8 inch floppies.

Another approach is to add 5.25 high density (1.2Meg) floppies to the 8 inch
controller portion of the Z-207 board.  I bought the RAM Technology kit to
do this.  The drive is a Mitsubishi half height and has given absolutely
no trouble in the six months it's been operating.  Care must be exercised
to avoid mixing high density with regular 5.25 floppies, the drives will
*EAT* each others media (this would possibly occur with 96 & 48 tpi drive
also????).  Yet another approach would be use of 1.44Meg 3.5 inch drives
with 8 inch controller (should work, does anyone know for sure????)


Cheers,

Walt K.