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This is a second of a two-part series covering memory expansions for the Casio VX-4 pokecon. The VX-4 was an educational market version of the FX-870P sold only in Japan. In the first video we replaced the internal 8K SRAM with a 32K part taking the VX-4 up to the spec of the FX-870P.
In this second part we’ll build a Casio RP-33 32K RAM upgrade module clone and also cover the design process. We started with a big push by a few friends and learned some about working with Zebra strips along the way. BTW, the RP-33 works with the following Casio models: FX-840P, FX-841P, FX-850P, FX-860P, FX-860Pvc, FX-870P, FX-880P, FX-890P, VX-1, VX-2, VX-3, VX-4, Z-1, Z-1GR, PB2000C and AI-1000.
Buy an RP-33 module: [ Ссылка ]
The RP-33 design files are on my GitHub: [ Ссылка ]
Timeline:
00:00 – Welcome
01:29 – Designing with zebra strips
08:44 – Design of RP-33 clone
14:17 – Soldering parts to the PCB
19:53 – Gluing the 3D printed shim to PCB
26:20 – Zebra strip installation, installing RP-33
28:35 – Testing the RP-33 clone
31:04 – Wrap up, Thanks!
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