Even MOS/CSG was re-using layouts!

A project log for MockA65xx - Universal 6502/85xx CPU replacement

Project to reverse-engineer and create edge-level exact replacements for major MOS6502-derivatives and also other MOS/CSG chips!

androSIDandroSID 07/09/2019 at 15:060 Comments

When starting the project I actually used die shots which were much worse

than the ones I use now (for other projects):

MOS8500R4 (aka 6510) vs. MOS8501R4

Although picture quality is quite embarrassing I could get use them because of

their similarity. That means: MOS/CSG really re-used chip masks which can

clearly be seen here.