Posted By
Gaia
on 2022-11-29
17:12:26
|  Re: V364 Project
Great idea, made me remember this old post of mine 
https://web.archive.org/web/20010222111757/http://plus4.emuviews.com/oldnews/200010.htm
The PLA in all 264 series machines does decode the speech register addresses (the KERNAL even performs a reset!), so it should be kind of straightforward for someone knowledgeable to design the interface circuitry. The original V364 machine used a dedicated glue ASIC (MOS8706) as opposed to the Magic Voice cart for the C64 that applied the slightly more common MOS 6525 tri-port interface chip.
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