PROM programming in the UK ?

[netdudeuk]

Hi

Is there anywhere in the UK that I could get a couple of vintage PROMs programmed ?

Thanks

[marcopolo]

Hi,

You should specify the PROM model to be programmed.

Marc

[Phil_G]

Ask here, our members can do most proms
https://www.vintage-radio.net/forum/forumdisplay.php?f=16

[netdudeuk]

Ask here, our members can do most proms
https://www.vintage-radio.net/forum/forumdisplay.php?f=16

Thanks Phil.  I'm already on there    It seems like a really friendly community.

[Squarewave]

Most people here could program them, which PROMs are you looking to get programmed?

[Phil_G]

Thats a very confident statement I believe its 74S287 and N82S129N

[Squarewave]

Thats a very confident statement I believe its 74S287 and N82S129N

Well, I just thought that the many excellently astute and well considered folk here may be able to turn their hand at programming them. I may be more confident at their technical acumen than you happen to be

[edavid]

It's not a matter of acumen, it's a matter of having access to vintage device programmers that still work, or the more exotic and expensive modern programmers that still support obsolete PROMs.  Not so easy.

[Squarewave]

It's not a matter of acumen, it's a matter of having access to vintage device programmers that still work, or the more exotic and expensive modern programmers that still support obsolete PROMs.  Not so easy.

One of the reasons I hope to get my Micromaster working again, the support it has for some older devices may well come in handy.

[peter-h]

OMG these are the old fusible-link PROMs.

I did somebody else's (!) final year univ project - an arbitrary waveform generator - using an 8 bit one of these, driven by a sync counter, and feeding an 8-bit DAC. In 1978.

The place I would start is Ebay, and old Data-I/O kit. It is possible the Chiplab supports these; it did just about everything. I can't see any on Ebay right now but there is a lot of that kit on the used TE market.

Distributors can program chips if you buy a load from them but this chip is about 40 years obsolete. I am not sure of the current situation; the last time I got some CMOS 22V10s programmed (1000pcs) was 10 years ago.

[ebastler]

OMG these are the old fusible-link PROMs.

I did somebody else's (!) final year univ project - an arbitrary waveform generator - using an 8 bit one of these, driven by a sync counter, and feeding an 8-bit DAC. In 1978.

The place I would start is Ebay, and old Data-I/O kit. It is possible the Chiplab supports these; it did just about everything. I can't see any on Ebay right now but there is a lot of that kit on the used TE market.

Distributors can program chips if you buy a load from them but this chip is about 40 years obsolete. I am not sure of the current situation; the last time I got some CMOS 22V10s programmed (1000pcs) was 10 years ago.

I assume the present thread is obsolete as well. Neither has the OP ever told us which parts they want programmed, nor do they still seem interested in the exercise.

[coppice]

The place I would start is Ebay, and old Data-I/O kit. It is possible the Chiplab supports these; it did just about everything. I can't see any on Ebay right now but there is a lot of that kit on the used TE market.

I would start with trying to find someone with a Data I/O, Stag or other programmer from the old days who knows how to use it. Those things are a minefield of needing just the right machine, with just the right adaptor modules, firmware updates, etc. to program anything but the most mainstream parts. For someone who doesn't know the machines that can be a nightmare. They were never all that reliable, using a lot of what were not always the finest quality connectors to connect all the plug in modules together. So, finding a working one, and verifying that its working to spec. for the part you want to program may be a challenge.

[peter-h]

Yes.

I got the impression these are for some sort of a DPLL radio. I recall DMEs used them for channel to frequency lookup.

Probably an easier way, if you have the data, is to make a simple adaptor which carries some EPROM and which plugs into the old fusible link PROM socket. EPROMs were slower but not that slow if you tied /CE and /OE to GND

Then you can also use an EPROM emulator - gosh another journey into the 1980s but I still have a few of those in a box. Very easy to load different data that way for testing.