CASIO VX-4
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RAM : 18kb and 50 ko available with RP-33 extension memory. Doesn't accept RP-8 ? To be verified.
Box
Tuning for rising the memory up to 2 X 64ko with a switch button.
Built-in 32ko extension RAM instead of a RP-33
Some videos :
The Chaconne by JS Bach (two parts) Some tektonic (by Paul TERGEIST)
Library
Links