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Nintendo partnered with Ricoh to put a Z80 in the NES, like Coleco and Sega, but Ricoh didn’t have the license to produce Z80s and didn’t think they would be ab
by krallja 5y ago
Nintendo partnered with Ricoh to put a Z80 in the NES, like Coleco and Sega, but Ricoh didn’t have the license to produce Z80s and didn’t think they would be able to reverse engineer it quickly enough. But they did have a reverse-engineered 6502 clone with the patented bits removed, and US copyright law didn’t cover IC lithography yet, and would they be interested in that instead?
- tagoregrtst 5y agoSo old chips arent covered since cppyright didnt extend to lithography. Either way, change the lithography keeping the chip electrically the same and you’re good to go