[sebhc] Schematic

[Walter Moore]

The H8-47 was not a soft-sectored controller.  It was an 8-bit parallel port
with a couple of handshaking lines.  The smarts were on the Remex 4810 disk
drive.  It had a 68B00, 68B21 and FD1791-2 for smarts.  The 4810 could talk
to other industry standard 8" drives as "slaves" (3 max, I don't know if
HDOS would allow all three).

The onboard processor would allow reading/writing through a buffer, so you
didn't have to worry about reading/writing in a given time interval.  It
also handled all formatting, etc.

I have thought that it would be very simple to connect an H8-47 controller
to a PC via the parallel port.  I haven't looked into this much, but it
can't be too hard (famous last words!).

..walt

-----Original Message-----
From: sebhc at sebhc.org [mailto:sebhc at sebhc.org] On Behalf Of Carroll Waddell
Sent: Tuesday, April 27, 2004 5:45 PM
To: sebhc at sebhc.org
Subject: Re: [sebhc] Schematic

If you want to send me the original, I will scan it and return it to
you, if you don't want to make a trip to the copy shop.
By the way, did Heath ever make a soft sector controller for the H8.
(other than the 8" H47)
Carroll

Jack Rubin wrote:

>Carroll,
>
>I've got the schematic for you - just need to stop off at Kinkos some
evening to get you a color copy so you can get the full xray effect. And
I've also got some neat aftermarket/homebrew heat sink mounts to share with
the list.
>
>Jack
>
>Carroll Waddell <CarrollWaddell at sc.rr.com> wrote:
>Does anyone have an x-ray view from Heath of the H8-17 controller board?
>I would like to try to clone that board. Finding one is like looking for
>a needle in a haystack.
>
>Now that I have found a source for the H8 card connectors, I will be
>making some hardware boards. If anyone is interested, the first one I
>will make is a 64K memory card. Next, perhaps a substitute for the H8-10
>wire wrap board.
>
>By the way, does anyone know if Heath purchased the heat sink / mounting
>rail for their H8 cards, or did they make them themselves.
>
>Carroll
>
>--
>Delivered by the SEBHC Mailing List
>
>

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