--- Tony Duell <ard_at_p850ug1.demon.co.uk> wrote:
> > The final connector, J6 is 50 pins.
> >
> Which pins are used on the 50 pin connector? Could it be pinned out as a
> SCSI port. Or is it possibly some custom host interface?
It could be a custom host interface. Among other anomalies, I don't see
any terminating resistors.
> For example I
> have here the data sheet for the WD1001 controller. It uses essentially
> the chipset you mentioned. It has a 50 pin host connector, but it sure
> ain't SCSI.
Can you scan that data sheet or send me a photocopy? I'd pay for
copying/mailing.
> 20MHz/4 = 5MHz = standard ST506 data rate.
Right. It's the right rate for an 8" disk.
> 8MHz is a common enough clock for the 8x300 series of CPUs as well.
OK.
> What bothers me, if this _is_ a SCSI controller is that there seems to be
> no way of setting the device address.
No place that I can see.
> My guess is that it's a sort-of WD1001 clone.
OK. That makes sense. In fact, when I read the recent debates of
WD1001's, I thought of this board. I didn't think I could find it
as fast as I did. It could have been packed a lot deeper than it
was.
Thanks for the insights.
-ethan
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Received on Sat Apr 17 1999 - 21:08:34 BST