Is it possible to obtain programmed 74S288 PROMs for the H949 Harmonizer?. I have an H949 in which pin4 of PROM #8 is giving a bogus output. Alternatively, armed with a binary, I could create my own using a fast EPROM of flash chip.

Alas, we have neither binaries nor spare proms – these will all have been lost or hidden long ago. Hopefully someone somewhere has a parts unit ..