Wanted WD-100x disk controllers -- NOT for ISA bus

From: Eric Smith <eric_at_brouhaha.com>
Date: Tue Jul 30 01:08:00 2002

Bob Shannon <bshannon_at_tiac.net> wrote:
> I've got a SASI to ST-506 / SA400 controller, I think its 8X300 based,
> but I'm unsure...

Yes, some SASI (and perhaps even SCSI) bridge boards did use the 8X300.
But the ones I'm looking for use the proprietary WD interface.

Ethan Dicks <erd_6502_at_yahoo.com> wrote:
> I think I have something much like that from a "Davong" external box I
> picked up at Dayton some years ago - it was billed as "SCSI" and the
> host connector *is* 50 pins, but it's nothing like SCSI and does have
> an 8X300 chip on it.

Could well be.

> I have no docs. Sorry. I was asking about mine some years ago and got
> some interesting replies, but no concrete information.

Looks like Al has the OEM manual for the original WD1000 already online:


The later models added features like ECC and suport for 1K sectors, but
still used basically the same interface and command set.

If you're familiar with the ATA (IDE) interface, the WD1000 registers and
commands will seem quite familiar.

Anyone got the WD1001 OEM manual? Or spare boards of either type?

Back in the old days, I built my own host interface for the Apple ][.
Since the WD100x buffers a full sector, the data transfer does not
require DMA, so the interface card was very simple.

Best regards,
Received on Tue Jul 30 2002 - 01:08:00 BST

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