PAL / GAL boolean logic

[kyeakel]

Has anyone seen or have a copy of the boolean logic equations that describe the contents of some of the chips in our vintage tandy computers? These parts usually have a tandy part number stenciled over the manufacturers part number. Manufacturers part numbers are 16V8 etc. It would be a good idea to archive this information somewhere so raw parts can be reprogrammed in case of a failure. It would also add clarity to the schematic drawing process.

Thanks,
Kipp

 

[eeguru]

That would be a handy thing to have. A lot of vintage PCs also use small ROMs to perform address decoding. For ROMs and L PALs, it would be simple enough to build a state scanner even if it means temporarily desoldering the IC. For Rs and Vs it gets harder if the FF are actually used to store state.