Wanted: M9312 ROMs

From: Pete Turnbull <pete_at_dunnington.u-net.com>
Date: Wed May 26 20:09:57 2004

On May 26, 21:19, Fred N. van Kempen wrote:
> On Wed, 26 May 2004, wai-sun chia wrote:

> > So I'll need boot ROMs which supports RA and DU disks. Because my
11/04 used to be an embedded CNC drill controller, in the place of the
regular CPU diagnostic is has a weird proprietary program which tries
to initialize some long-gone/dead equipment which used to be connected
to the PDP.
> >
> > In summary, I'm willing to pay a fair/reasonable price for the
following M9312 ROMs (unless some one has spares, then I wouldn't mind
them free of course :-)):
> ...
> Although I assume we can all check our systems and boards and come
> up with all of these, wouldnt it be much nicer (and cheaper) if you
> just get the ROM contents as binary files, which you then plug into
> an eprom?

Unfortunately they're small bipolar fusible-link PROMs which are hard
to get and almost as hard to find a programmer for (unless you're me or
Tony). The A9 types are 82S131 (or MMI6306, 75S171, 27S13, 93448, etc)
16-pin DIL 512-words by 4-bit wide, and the F1 types are 82S137 (or
TI24S41, MMI6353, 74S573, 27SS33, 93453, etc) 18-pin DIL 1024 words x
4-bit wide.

The idea of storing the images is a good one, however. As far as I
know you can't get these from DEC/Compaq/HP any more, so I'll host them
if anyone has images to add to the collection.

Pete						Peter Turnbull
						Network Manager
						University of York
Received on Wed May 26 2004 - 20:09:57 BST

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