How does one construct or acquire an IC that's no longer in production? Is it possible to find out the logic of these ICs so that one can design and have a manufacturer design one custom? I don't know much about acquiring chips other than the ones on the market now.
What I'm trying to do is get my hands on the RICOH 2A03 which was used as the audio processing unit for the Nintendo Famicom/NES.
Ordered a replacement PCB for a failed HDD. Device arrived quickly and security. It came with instructions and options in an anti-static bag. I replaced the PCB on the drive and instantly started working again. Thanks, Donor Drives!