Hi there,
I am trying to restore an old piece of audio hardware, which incidentally is the same model as my user name. It is a digital sampling keyboard which was made in the late 1980's
The trouble which I (and others) are having is that the unit is full of old custom PALs right through the logic and computer circuits. Some of these are failing.
I have been working with another user trying to read and write some of the PALs. We think we've been successful in reading some so far and have some JED files generated from them.
However I've been struggling with the next step, which is trying to write them back into newer GAL chips. I have the trusty TL866 II programmer which does seem to write the chips OK. I can read back the data and verify after writing. But I still can't get them to actually function in the host machine.
I was wondering if anyone could assist who has had some experience dealing with this sort of problem? Anyone here successfully ported old PAL22V10 over to GAL22V10? I can provide the JED files we have so far if anyone would be so kind to take a look at them?
Thanks for your time
Regards
Luke (EIII)