Posted By
MMS
on 2018-04-03
03:42:28
 |  Re: Modern sound chip for the Plus/4?
OFF
I found the topic for this cards, this guy is producing and selling the closed, built with the improved Yamaha chip: 30€ + postage
I will probably buy one from my C64, but I will need the piano-simulating plastic add-on keys too.
http://www.lemon64.com/forum/viewtopic.php?t=54697&sid=2d03f861634423c7e6a79ddc109356a0
I quickly checked some documentation, I think due to memory mapping it will be not easy to implement for Plussy. Despite has a very nice voice...
All the details: http://www.floodgap.com/retrobits/ckb/secret/sfx.html
UPDATE:
SFX Expander Schematics:
http://www.zimmers.net/anonftp/pub/cbm/schematics/cartridges/c64/sfx/
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