What's a WD2793A chip?

From: Richard Erlacher <edick_at_idcomm.com>
Date: Fri Feb 4 17:59:29 2000

A 1781? !!GAWD!! I've not seen even an oblique reference to that number
since back in the '70's. Wasn't that the one that died with MMFM? I don't
believe I ever saw one in the "flesh." Nevertheless, the difference between
it and any other member of the WD 8"-drive-capable controller line is
probably pretty minor.

Dick
-----Original Message-----
From: Dwight Elvey <elvey_at_hal.com>
To: classiccmp_at_classiccmp.org <classiccmp_at_classiccmp.org>
Date: Friday, February 04, 2000 3:09 PM
Subject: Re[2]: What's a WD2793A chip?


>"Richard Erlacher" <edick_at_idcomm.com> wrote:
>> That's correct, Eric, it's a direct replacement, functionally, for the
1793,
>> with an analog clock extraction circuit. It has the limitation that the
>> analog clock processing circuit requires a different lowpass filter for
8"
>> and 5-1/4" drives, and, IIRC for FM or MFM.
>
>Hi
> I have a iSBX card that I wrote a driver for that uses a
>2793. It is software compatable with the 1793. It does
>1.44M disk with the right clock. What I'd like to
>know is what are the software requirements for a 1781?
>Dwight
>
Received on Fri Feb 04 2000 - 17:59:29 GMT