Wanted: M9312 ROMs

From: Joe R. <rigdonj_at_cfl.rr.com>
Date: Wed May 26 21:17:39 2004

At 02:09 AM 5/27/04 +0100, you wrote:
>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

   Or me. I have an old Pro_log programmer that will program them too. I
just need to be sure that I have the proper adapter to work with the
specific brand of blank PROM. (Every brand part is programmed differently).
In fact, I think I have a Stag programmer that will also program them. I
also have a stack of M9312s :-)

  It would be a dammed sight easier to use PROM boards that use EPROMs. But
I don't know if they're fast enough.


 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 - 21:17:39 BST

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