To: submit-linux-dev-8086@transmeta.com
Cc:
From: hpa@transmeta.com (H. Peter Anvin)
Date: 11 Jul 1997 17:05:56 GMT
Newsgroups: linux.dev.8086
Followup to: <Pine.HPP.3.95.970709133142.11827A-100000@ldvgpi22.eikon.e-technik.tu-muenchen.de>
By author: Florian Schiel <beo@eikon.e-technik.tu-muenchen.de>
In newsgroup: linux.dev.8086
>
> I'm also seeking for some sortware to get to the cmos :-\
> >
> > Hence his question--can one get a card to control both XT-IDE and "big
> > IDE" cards for a small computer. :)
> actually i've never seen a 8-bit-XT-IDE drive, but it should be possible
> to get 16-bit data with little hardware on a 8-bit bus, but i guess you
> need to patch the bios Routines for HDD access...
> >
Seagate are a great way to check these things out... they have the
bloody good taste of publishing a huge .zip file with spec sheets and
jumper settings for every hard drive they've ever made on their FTP
site... online data since long before the Web existed.
Seagate drives have model numbers of the form:
ST-<form factor><capacity><interface>
... where <form factor> is a single digit and <interface> is a single
letter (or no letter for the original ST-506 MFM -- note the capacity
- 6 MB unformatted.)
The "large IDE" drives we know they refer to as "AT BUS" drives, and
are suffixed "A", as in ST-31660A. However, they also publish a few
drives with an "X" interface, listed as "XT BUS". This is presumably
the "8-bit IDE" talked about.
Only four such drives are listed, three of which are variants which
apparently can do either the XT or AT variety:
ST-325X, ST-325AX, ST-351AX, ST-352AX
They are 20, 20, 40 and 40 MB, respecively, using stepper motors and
2,7RLL on one hand, but using thin film and ZBR on the other. Strange
beasts...
-hpa
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