* The noise tone can be changed by applying an AND and OR mask to the output
<br>=== Replacing the AY-3-8912 in the CPC with an AY-3-8910(A) === In case that the AY-3-8912 needs to be replaced in the CPC it can become a hurdle these days to get a real AY-3-8912 especially for an acceptable price. Instead of the original AY-3-8912 it's possible to use an AY-3-8910(A) instead with the help of a small adapter board. An open source adapter board can be found here: https://github.com/etomuc/CPC-AY-3-8910-to-8912-adapter For tips regarding the desoldering of ICs see this Wiki page: [[IC Repair]]
== Datasheets ==