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Old 14th Jun 2019, 11:30 pm   #190
Slothie
Pentode
 
Join Date: Apr 2018
Location: Newbury, Berkshire, UK.
Posts: 144
Default Re: MK14 schematic revisions

Quote:
Originally Posted by SiriusHardware View Post
You've obviously gone away from the possibility of using PLDs or GALs or PROMs as custom address decoders, a decision which I can safely applaud since I'm not the one who actually has to get all the necessary standard logic onto a PCB.
Yes I haven't gone in that direction partly because I want the result to look like it could have been from the 70's but mostly because I've used CPLDs in the past and the software you need to make the programming files is a pain to use (Quartus I'm looking at you!) GALS are getting rarer to find too even if you can find the software for them.

As for PROMs I've blown up a few MOSFETs on breadboards trying to get the programming wave-forms right but then all this excitement with my eyes started and I've yet to get back to it!
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