Apple HAL XEBEC controller - test-drb@ccmp.vtda.org

17 Apr 1999

Xebec made a number of "specialized" bridge controllers, which fit between
the host adapter, which is what you've described, in this case possibly
intended to go to a compatible version of their 14xx-series controllers
which, in turn, provides a SCSI interface to an ST506 drive, which you
apparently have on hand.

It is likely that the 26-pin connector is to the Apple II version of SCSI
which was put out back then on a 25-pin DB-25 connector.

I recently got a drive with a Xebec label on its enclosure, having bought it
for the enclosure, and found the drive had an integrated adapter on it which
was terninated in a DC-37 connector, not unlike what was on the early
Bernoulli Boxes from IOMEGA.  I didn't investigate the pinout or anything,
naturally, since I don't care about small drives like this.  There's
probably a similar version for this card's interface as well.

Dick

-----Original Message-----
From: Pete Turnbull &lt;pete(a)dunnington.u-net.com&gt;
To: Discussion re-collecting of classic computers
&lt;classiccmp(a)u.washington.edu&gt;
Date: Saturday, April 17, 1999 9:45 AM
Subject: Apple HAL XEBEC controller

...
 One of today's acquisitions is a small card for an
Apple ][ (or Apple ///),
labelled "APPLE 2/3 XEBEC INTERFACE REV 1".

I happen to have a couple of old Xebec ST412 winchester controllers, so I'd
like to try this out.

Can anyone tell me the pinout of the 26-pin header at the end of the card?
 Pins 3,7,11,15,17,19,21,23,25 are grounded, the other seventeen seem to be
signal lines.  Pins 1,5,9,13,20 are high impedance; the other even-numbered
pins are terminated by a 220/330R resistor pack.

Does it need any other software (like a formatting disk)?  The on-board 4K
EPROM contains only the strings "(C) HAL COMPUTERS LTD 1983", "A/XHAL
SHARED RESOURCE WINCHESTER SYSTEM", "NOT CONNECTED", and "SRS
ERROR", so I
guess there would have been a floppy with it, originally.

--

Pete Peter Turnbull
 Dept. of Computer Science
 University of York 