IPC on eBay

[Vale, Martyn]

Hi All,

If anyone is interested there's an MDS II/III IPC on ebay item number 196992337346

https://www.ebay.co.uk/itm/196992337346?_skw=196992337346&itmmeta=01JNTTQTS4P2Z6T9EWS6BCB8ZY&hash=item2ddda885c2:g:9tsAAOSwl69nou2~&itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1eoYev1Xt4DWJGcQbMwei6kmhoWE2HEwmYQA4vJnVgu85GIxI2oOlQHW5VsiQYrZk2Q7lBGH0p12NhEobhB6x3%2Fqjykr2cDRRh7gnnxurIs8KjdF8WhUiqHHEeUCBkgBPOAsHa5xRaNJfP9EmFjAorOhv%2FaVklzAOgENsVvPKaG4w8Sopw5NpZUbTSbUfyEnTOuoKM5n9RnpW0NunviJRj36VF08H%2FpE0o44xhhB1dEdCoFQnMlxcepMUvWs%2B%2Fo8vECOfjwFvwPpuagg41N%2BZnam8DQuXLvKBUzYfSQO9cntA%3D%3D%7Ctkp%3ABk9SR9Ss39quZQ

Unfortunately the front panel appears to have been removed be someone very badly ! 8251's and 8085 + something else are missing.

Bye
Martyn.

[Vale, Martyn]

Oh and all the RAM has gone as well.......................bargain really !

-----Original Message-----
From: intel-...@googlegroups.com <intel-...@googlegroups.com> On Behalf Of Vale, Martyn
Sent: 08 March 2025 12:17
To: intel-...@googlegroups.com; William Beech <nj...@nj7p.org>
Subject: intel-devsys IPC on eBay

⚠ Caution: External sender

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[Jon Hales]

It's an IPB. 32kb of Ram.

[Herbert Johnson]

For USA ebay home-gamers:

https://www.ebay.com/itm/196992337346

since it's in New York state USA anyway.

Note that all one needs for an ebay auction item, is the ebay auction
number. anything in the URL past the auction number with "?" question
mark is telling ebay "here's where that person got that link from" and
is unnecessary to include for purpose.

I may have one of these boards myself. I'll update accordingly sometime
today after I've looked.

regards Herb

On 3/8/2025 7:16 AM, Vale, Martyn wrote:
>
> Hi All,
>
> If anyone is interested there's an MDS II/III IPC on ebay item number 196992337346
>

> https://www.ebay.co.uk/itm/196992337346?_[very long link]

> Unfortunately the front panel appears to have been removed be someone very badly ! 8251's and 8085 + something else are missing.
>
> Bye
> Martyn.
>

> --
> You received this message because you are subscribed to the Google Groups "intel-devsys" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to intel-devsys...@googlegroups.com.
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--
Herb Johnson, New Jersey USA
http://www.retrotechnology.com or .net
preserve and restore 1970's personal computing
email: hjohnson @ retrotechnology dot com
or try later at herbjohnson @ comcast dot net

[Herbert Johnson]

Update to that eBay seller. A look at other auctions by that seller,
shows a bunch of scrapped motherboards and logic boards. Worse, a number
of auctions for *pulled EPROMS* as follows:

https://www.ebay.com/itm/196750148245
https://www.ebay.com/itm/196602020365
https://www.ebay.com/itm/196676016734

Search their listings for "intel" to see some other intel cards. but
check to see if they have their EPROMs. Also, check markings on the
above EPROM sales to see if any suggest pulls from Intel boards.

regards Herb

[scott baker]

Can someone tell me what this board is, from the same seller? https://www.ebay.com/itm/205104737551

It's some kind of display and keyboard board. The ZIF sockets make me think maybe an EPROM programmer of some sort.

It's too bad the seller scrapped these items. I think they'd have fetched more for them and been far more useful to the community had they left them intact. Boards with the EPROMs removed. Cables cut or mangled. Makes for a mess.

Scott

[Jon Hales]

Trying again - the photos I attached a few moments ago were too large.

It's probably a Prompt48. I'm attaching a couple of photos of a more complete Prompt48.

Regards

Jon

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[William Beech]

Herb,

The first listing you have is clearly all Intel pulls.  The other two
don't appear to have any Intel pulls.

Bill

[craig andrews]

There is something screwy about that prompt 48 board. I am not sure if it is an early prototype or a later version. But it is different than most. 

Craig

On Mar 8, 2025, at 10:37 AM, scott baker <smb...@gmail.com> wrote:

Can someone tell me what this board is, from the same seller? https://www.ebay.com/itm/205104737551

[Mark Huffstutter]

For one thing, it is missing the two 8213 Ram chips and the 8205 Decoder to the

Immediate right of the A1-A4 ROM block present on standard PROMPT-48 motherboards.

 

Mark

To view this discussion visit https://groups.google.com/d/msgid/intel-devsys/B8D0B486-D5F3-4734-8686-279F76DD54C7%40gmail.com.

[scott baker]

Looks like the Prompt-48 has sold now. I'm kinda breathing a sigh of relief -- I came close to picking it up for $100, but having to deal with something that parts have been scavenged from is kinda... meh.

Anybody here pick it up? It would be cool to hear your experiences with it.

Scott

[andre...@gmail.com]

Wasn’t me.  I had offered him $100 some time ago but he didn’t take the offer.  The more I thought about it, I was happy he didn’t accept my offer and I didn’t pursue it further.  With the mods and oddball design, it looks to be an engineering prototype that I just didn’t see could be worth the trouble.  That said, whoever bought it, it would be nice if they shared what information they discover.

 

craig

To view this discussion visit https://groups.google.com/d/msgid/intel-devsys/5bfe25e1-5380-40c9-a851-3eac260a4a86n%40googlegroups.com.

[scott baker]

That's interesting. My original offer was $70 and he countered at $100. So I could have had it for the same as you had offered him. I decided to try to push it to $90 though, and he didn't respond to that counter. I think fate saved us both. :) Hopefully someone is able to successfully get it working and is able to make a nice story of it.

Scott

[Vale, Martyn]

 

Hi All,

 

I’ll admit to buying it !

 

I missed out on one about three years ago and haven’t seen one since for sale although there was a complete one on Rogers FB page that someone acquired as part of an MDS-800 I think it was.

 

I mean how bad could it be ? well it’s definitely missing ram and an 8255 and all the roms (they are at least on Bitsavers) Most of his stuff doesn’t seem in the best of shape I looked at the ICE-48 emulator board a while back and all the socketed stuff was missing and the top of one if the ram chips was smashed.

 

I’ll take some high res pictures when it arrives and you can all pick it to pieces, it’s definitely older than the one Jon pictured going by the revision numbers, but does have the same PWA number.

 

I really wanted as a target system for my ICE-49 which is now almost fully functional, just not sure about breakpoints currently.

 

Bye

Martyn.

To view this discussion visit https://groups.google.com/d/msgid/intel-devsys/44f8ca54-05a6-4ed2-91fb-a6ab3bcd4f0cn%40googlegroups.com.

[Vale, Martyn]

 

Well maybe not so odd after all:

 

 

Found the above here:

 

https://www.worthpoint.com/worthopedia/intel-prompt-48-microcomputer-1823587674

 

maybe it’s just a really early version.

 

Martyn.

To view this discussion visit https://groups.google.com/d/msgid/intel-devsys/DU2PR01MB793612C548633F6C8D5E4C18C1D62%40DU2PR01MB7936.eurprd01.prod.exchangelabs.com.

[scott baker]

Congrats Martyn, it sound like it will pair nicely with the rest of your system!

Glad to see it is in good hands,

Scott

[andre...@gmail.com]

Congratulations on the new project Martyn.  The nice thing is that after you get it going you have a fully functional prompt 48 just minus the sheetmetal.

 

I am interested to hear about the differences.

 

Regards

Craig

 

From: intel-...@googlegroups.com <intel-...@googlegroups.com> On Behalf Of Vale, Martyn
Sent: Monday, March 10, 2025 5:22 AM
To: intel-...@googlegroups.com
Subject: RE: intel-devsys IPC on eBay

 

 

Hi All,

To view this discussion visit https://groups.google.com/d/msgid/intel-devsys/DU2PR01MB793612C548633F6C8D5E4C18C1D62%40DU2PR01MB7936.eurprd01.prod.exchangelabs.com.

[Craig Andrews]

Hi Martyn 

Have you gotten a chance to study your new prompt board to see the differences?  Does it use the 2113 or 2114 for RAM?

Regards

Craig

On Mar 10, 2025, at 1:05 PM, scott baker <smb...@gmail.com> wrote:

Congrats Martyn, it sound like it will pair nicely with the rest of your system!

To view this discussion visit https://groups.google.com/d/msgid/intel-devsys/ec6ca93e-0d76-461b-b96a-61790bc050e8n%40googlegroups.com.

[Vale, Martyn]

Hi Craig,

 

It arrived late last week and I’ve just added some hi-res pictures on the Google Drive under MartynV/Prompt48.

 

All I’ve done is straightened up a few pins and capacitors and as you can see it’s very clean and it pretty good condition. I have just notice from the underside picture there is some scratching above and to the left of the power connector, so I’ll need to look at that.

 

It would have had 2113’s in it originally, however they are long gone along with anything that was in a socket unfortunately. Luckily there’s firmware on Bitsavers and I hope the older version there will work.

 

I guess the only difference is the missing 2114’s and decoder at the top of the PCB. Interestingly if you look at the oldest schematics from 1977 which I’ve included in the same folder there is a circuit for a piggy back board which presumably upgraded this version to the later one, see below:

 

 

There’s a picture of it on the following page. Doesn’t look to difficult to reproduce, would be interesting to see an original one if any still exist or potentially ever existed !

 

I’ll keep you updated when I start working on it.

To view this discussion visit https://groups.google.com/d/msgid/intel-devsys/14E1F510-8741-4772-BFDE-A778C6661504%40gmail.com.

[andre...@gmail.com]

Hi Martyn,

 

The 2113 was just a stop gap because intel couldn’t get the 2114 to work properly and was a year behind everyone else.  To my knowledge, it was only used on the 80-20, the prompt-48, and ice-85.  It was only used for inhouse products and was never sold commercially.  Early boards planned on the 2114 and needed the adapter, later boards were just designed for the 2113 and had a A0L / A0H jumper.  I am curious about the two missing 2113 chips near the top to the right of the EPROMs, and what they were doing for that memory space.  Maybe it just doesn’t exist on that board.  Of course you can just use 2114s in place of the 2113s.

 

Regards

craig

To view this discussion visit https://groups.google.com/d/msgid/intel-devsys/DU2PR01MB79360F70A11F9AB43A4328DCC1A82%40DU2PR01MB7936.eurprd01.prod.exchangelabs.com.