Hi All,
Just throwing a quick query out there about JVS motherboards.
I have a SUN PSU, and the only JVS kit I have are Naomi & System 573.
I have just finished modding one of my Mushi cabs to JAMMA using the SUN PSU, and have sucessfully added a -5V line to the cab. I have used the 2 top unused pins on the JST connectors for the -5V pins, and since I use extension cables for my JVS kit, I don't have the -5V going to it.
My query is, if I was to mod some SUN PSUs to have the -5V, is there any equipment that has the unused pins going somewhere?
Looking on the back of the Naomi filterboard, the top unused pins don't go anywhere, but the bottom 2 go to ground. The System 573 doesn't have pins in the unused ports, so I just wondered if any other stuff might suddenly get **** by having -5V shoved through a terminal it shouldn't go through.
Thought I could offer a -5V mod for members, if there is any interest.
(I can make up +5 to -5V units for addition to any PSU if anyones interested - like the negatron, but probably much cheaper)
Cheers
JVS Motherboards
- dj_johnnyg
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JVS Motherboards
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- invzim
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Re: JVS Motherboards
Why, would anyone want -5 V on the JVS connectors? There is no "native" equipment that can use it anyway - so cable hackery would be involved anyway.
Also, even if the pins are not used on some platforms, they are all defined, and a mod would thus be in violation of the JVS standard:
Also, even if the pins are not used on some platforms, they are all defined, and a mod would thus be in violation of the JVS standard:
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- dj_johnnyg
- Loves CAVE
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Re: JVS Motherboards
I'm using a JVS PSU in my JAMMA Cab, and needed the -5V for older JAMMA stuff.
Didn't realise that the "unused" pins were meant for 2.5V, so thanks for that info!
Didn't realise that the "unused" pins were meant for 2.5V, so thanks for that info!
Snakes: They're like bits of rope, only angrier.