I can do them with the Data I/O 29B and UniPak 2B. Some of the other UniPaks can handle them too. They are one of those devices that most of the newer commercial programmers can't do. I wouldn't call the Data I/O really affordable, though.
If you want to send us a blank we can program it for you, or we probably have some blanks for that part # on hand. Watch out buying blanks on eBay, they're often pulls and are actually already programmed. Also the yield was not 100% even back in the day, apparently, so buy several to ensure you do get a good one. Thanks, Jonathan ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Monday, September 27th, 2021 at 11:23, Tom Hunter via cctalk <cctalk@classiccmp.org> wrote: > While restoring and repairing a Data General Nova 2/10 I found a bad > > bipolar PROM on the CPU board. The PROM has open-collector outputs and is > > organized as 32 words by 8 bits. It appears that one of the open-collector > > driver transistors is faulty (but it could also be that a fuse has > > "healed"). > > The part is an Intersil IM5600CP, but these were also made by others, for > > example Signetics and Philips made the 82S23 and TI and NTE made the faster > > SN74S188N. Some vendors still sell these parts and there are even a few on > > Ebay. > > How do I program these PROMs? I found one somewhat obscure description of > > the algorithm in the NTE datasheet, but I suspect that each manufacturer > > had (somewhat) different algorithms. > > Is there an affordable commercial programmer out there which can program > > these PROMs? > > Is there a simple design out there which I could breadboard for a one-off > > programming job (maybe using an Arduino to control the programming > > sequence)? > > Thanks and best regards > > Tom Hunter
