Author here if anyone has questions.
Can you explain what’s odd about the ROM chips of the PET necessitating the adapters for replacement with more common parts?
The MOS Technology 6540 ROM included some on-chip address decoding. The adapter board has a TTL chip to perform this decoding, and uses a standard 2716 EPROM.
Oh interesting. I’ve never heard of a chip like that.
Thanks.
Can you explain what’s odd about the ROM chips of the PET necessitating the adapters for replacement with more common parts?
The MOS Technology 6540 ROM included some on-chip address decoding. The adapter board has a TTL chip to perform this decoding, and uses a standard 2716 EPROM.
Oh interesting. I’ve never heard of a chip like that.
Thanks.