18 Apr
1999
18 Apr
'99
6:46 p.m.
On Apr 18, 11:58, Sellam Ismail wrote:
hard
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 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