Interest check is open now. Getting ready to produce some of these. Get on the list if you want one.
I'm planning on picking up a Vewlix soon and I already know it will likely be equipped with a FASTIO. I will definitely need a JVS IO for it but I'm not too keen on the $250+ price of these Taito JVS IO boards. Instead I plan to use a cheap Sega Type 3 IO and for that I will need an adapter for the Vewlix IO harness.
I am aware of the official Taito harness adapter, but I've not seen one for sale anywhere, and I'm skeptical about whether it would work for adapting a Sega IO to a Vewlix cabinet. It seems to me that it's designed to do the opposite, adapt a Taito IO to a SEGA cabinet. The problem with that is that SEGA IO boards need +5V power to work, and Taito IO boards only need +12V power input because they have a built in voltage regulator for +5v. Therefore as far as I can tell the Taito adapter would not be able to supply the needed +5v to a SEGA IO.
My solution is to integrated a +5V regulator into the adapter board in the same way that the Taito IO has an integrated +5V regulator. I've gone with a TPS5430DDAR 3A switching regulator which takes +12V input from the Vewlix IO Power harness and outputs +5V to the SEGA I0. The adapter board also passes +12V to an output connector to provide +12V to the SEGA IO also. Otherwise the IO adapter simply converts the Taito 60 pin harness pinout to the SEGA 60 pin harness pinout.
I'll be ordering some prototypes next time I do a run of PCBs. Hopefully I get a Vewlix soon so I can run the design through it's paces. If you are a Vewlix owner let me know if I missed anything important here.
I'm planning on picking up a Vewlix soon and I already know it will likely be equipped with a FASTIO. I will definitely need a JVS IO for it but I'm not too keen on the $250+ price of these Taito JVS IO boards. Instead I plan to use a cheap Sega Type 3 IO and for that I will need an adapter for the Vewlix IO harness.
I am aware of the official Taito harness adapter, but I've not seen one for sale anywhere, and I'm skeptical about whether it would work for adapting a Sega IO to a Vewlix cabinet. It seems to me that it's designed to do the opposite, adapt a Taito IO to a SEGA cabinet. The problem with that is that SEGA IO boards need +5V power to work, and Taito IO boards only need +12V power input because they have a built in voltage regulator for +5v. Therefore as far as I can tell the Taito adapter would not be able to supply the needed +5v to a SEGA IO.
My solution is to integrated a +5V regulator into the adapter board in the same way that the Taito IO has an integrated +5V regulator. I've gone with a TPS5430DDAR 3A switching regulator which takes +12V input from the Vewlix IO Power harness and outputs +5V to the SEGA I0. The adapter board also passes +12V to an output connector to provide +12V to the SEGA IO also. Otherwise the IO adapter simply converts the Taito 60 pin harness pinout to the SEGA 60 pin harness pinout.
I'll be ordering some prototypes next time I do a run of PCBs. Hopefully I get a Vewlix soon so I can run the design through it's paces. If you are a Vewlix owner let me know if I missed anything important here.
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