Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!comp.vuw.ac.nz!actrix!Roger.Sheppard
From: Roger.Sheppard@bbs.actrix.gen.nz
Newsgroups: comp.sys.atari.st.tech
Subject: Re: Problems/Questions about Chinon HD drives.
Message-ID: <1991Jan18.040818.14703@actrix.gen.nz>
Date: 18 Jan 91 04:08:18 GMT
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Sender: Roger.Sheppard@actrix.gen.nz (Roger Sheppard)
Organization: Actrix Networks
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Comment-To: adamd@rhi.hi.is
 
Note: The drive select lines and the side select are not buffered, they
are just LPTTL, this is easly overloaded with the pull up resistors that
are fitted to OEM drives, use a LPTTL IC O/C that can drive into 
500 ohms, the normal pull up resistor for OEM drive are 1 K ohms, so
with 2 drives that will be 500 ohms, If I remember the IC is 74LS05, but
correct me if I am wrong, Atari use about 2.7 k resistors in there
drives...
 
-- 
Roger W. Sheppard   85 Donovan Rd, Kapiti New Zealand...