SMS LE interface
doc at mdrconsult.com
Sat Nov 25 21:04:27 CST 2006
Ethan Dicks wrote:
> On 11/25/06, Brad Parker <brad at heeltoe.com> wrote:
>> The one I have has a boot prom; I don't know if it's rx01/02 compatible.
> I can't guarantee your model (mine is a dual floppy), but AFAIK, all
> of the SMS drives for DEC machines are at least RX01, if not RX02,
> compatible. Moreover, most, if not all, of the SMS drives should be
> able to take a totally blank floppy and format it (DEC RX01s can't
> format a thing, and the RX02 can only re-write the data portion of the
> track of a pre-formatted RX01 disk and make that part double-density,
> thus, converting an RX01-K into an RX02-K).
> There are other ways of starting with blank floppies (the RX01 format
> is large-system IBM compatible, thus standard), but few options using
> a DEC CPU.
I have a Unibus SMS board marked FD1100I on a hand-lettered label,
and SMS PE-HIP with an Intel 8008 and a Shugart FDC chip. I don't
remember which one.
I'd love to know how to use it. That Shugart chip implies it has a
lot more smarts than an RX02 controller. If it does Winchester too, so
much the better.
There are a 50-pin, a 40-pin, and a 30-pin header on it. I can scan
it Tuesday for a hi-res image if anyone's interested.
Err. I *assume* it's Unibus. It came in a non-functional PDP-11/04.
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