Path: utzoo!utgpu!water!watmath!clyde!rutgers!sri-spam!ames!pasteur!ucbcad!ucbvax!decvax!decwrl!sun!pitstop!sundc!seismo!uunet!mcvax!unido!infbs!schwarz
From: schwarz@infbs
Newsgroups: comp.sys.atari.st
Subject: Atari HD info required - (nf)
Message-ID: <21600007@infbs.UUCP>
Date: 11 Jan 88 13:25:00 GMT
Lines: 27
Nf-ID: #N:infbs:21600007:000:949
Nf-From: infbs!schwarz    Jan 11 14:25:00 1988
Posted: Mon Jan 11 14:25:00 1988


Hi Sirs,

I would like to abuse the Atari harddisk SH204 as a disk in a transputer
system. Therefore a simple transputer link to ASCI bus interface is to
be build. But due to lack of documentation I do not know the required
handshake timing diagrams of the Datarequest (DRQ) and Acknowledge (ACK)
signals. 

My questions: Does someone outside know the timing specification for the
asynchronous protocol of the harddisk ? I have seen a cycle time of about
750 ns for one byte transfer controlled by DRQ ACK signals driven by
Atari St. Is it feasible to work with a cycle time of approximately 1300 ns ? 
Does someone know where to get authorized documentation for the harddisk ?

*Any* information about the disk is appreciated.

TU-Braunschweig
Institut fuer Theoretische Informatik
Projekt Ausbildungstechnologien
Ulrich Schwarz
Bueltenweg 74/75
3300 Braunschweig
West-Germany

uucp: 	..!uunet!mcvax!unido!infbs!schwarz
bitnet: schwarz at dbsinf6