On Apr 18, 11:58, Sellam Ismail wrote:
> Can you scan this card and the Xebec interfaces you have and post a
> picture of them somewhere? I then might be able to tell you if you've
got
> a winning combination.
Sadly, that's one of the projects that's "less than complete" at the
moment.
> Ok, I just took stock of the hardware in my next room. I have a First
> Class Peripherals Sider ][ hard drive (actually two) and for the first
> time ever noticed that they have a Xebec label on the bottom, which I
> guess means these are actually Xebec hard drives and First Class was the
> name they sold hard drives under? Whatever.
I didn't know Xebec made drives, but it's perfectly possible. They used to
describe themselves as the "Zero Defect" company, so that would fit.
> Ok, so then I opened one up and noticed a Xebec PCB that is the same size
> as a 5.25" drive, that contains among many other things a Z80, an 8502
and
> a ROM with a Xebec label. The connector is 50 pins.
Sounds just like mine.
> I then opened the Apple //e hood and the Xebec controller card also has
50
> pins.
Ah. Well, I didn't really expect you'd have a setup that was quite the
same. Thanks very much for taking the trouble to check, though.
> So I'm not familiar with the card you have at only 26 pins.
>
> > Was there a standard pinout on Apple SCSI/SASI boards? Perhaps it's
the
> > same as the Mac 25-pin SCSI?
>
> If you consider Xebec to be the standard then yes. I've never seen a
hard
> drive controller made by any company other than Xebec.
Hmm... I've seen lots, notably Adaptec and Xylogics... but perhaps you mean
in an Apple environment -- in which case the only other name that comes to
mind is Corvus, and I've no idea what they used. Not SCSI, I think.
Still, I've got a few ideas, so tomorrow I'll go and dig out the Mac
manuals and look at their 25-pin interface, and check some of the traces on
the Apple board to see if there's a plausible match.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
Received on Sun Apr 18 1999 - 18:46:13 BST