Western Digital WD 1002S-SHD card ???

From: Joe <rigdonj_at_intellistar.net>
Date: Tue Feb 15 11:16:15 2000

At 08:02 AM 2/15/00 EST, Mike wrote:
>In a message dated 2/15/00 00:26:40 Central Standard Time, donm_at_cts.com
>writes:
>
>> >
>> > < I visited a surplus dealer today and picked up an external hard drive
>> > <case that he was throwing out. The case has a Seagate 225 drive in it
>with
>> > <some kind of Western Digital interface card. The card has MFM
>connection
>> o
>> > <one end and a 50 pin header on the other. The header is connected to a
>> > <cable that had a SCSI type plug on it. Does anyone know if the card
is a
>> > <SCSI to MFM interface or what?
>> >
>> > Well St225 is MFM so the card is either a host to MFM bridge or
>SCSI(SASI)
>> > to MFM bridge.
>> >
>> > The real answer is a part number on the card like WD1002-HDO (host
>> interface
>> > number). Someone else may be able to confrm if the SHD is SASI or at
>that
>>
>> > time early SCSI.
>>
>> TheRef45A says that it is SASI to ST-412.
>>
>> - don
>>
>
>Most of the early Heath/Zenith Hard Drive set ups manufactured by after
>market suppliers used the XEBEC controllers on the hard drives and
interfaced
>to an SCSI card in the computer. The 50 pin female header connected to a 50
>pin male header on the SCSI card in my H-89's. There were other schemes,
one
>involving a Western Digital PC controller mounted on the ST-225 and an
>interface decoder card on the left buss in the H-89. I would bet that the
HD
>described was interfaced to an SCSI card though.
>
>Just my .02 worth. YMMV
>
>
  It would be great if I could make it work with my Z-100! Any suggestions?
 I have an original hard drive controller and data separator cards for the
Z-100 but I found them buried in the dirt in a scrap yard and they're in
poor condition. The controller card is a S-100 card and the data separator
card is a small card that mounted on top of the drive.

  FWIW I just bought some Zenith technical manuals and I think there's a
manual in there for the XEBEC card as used in the Z-89.

   Joe
Received on Tue Feb 15 2000 - 11:16:15 GMT