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pmgducati / Blue-Retro-AIO-Units

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No an issue with the hardware just a question #69

Closed brendan1495 closed 11 months ago

brendan1495 commented 1 year ago

Maybe a daft question but what does

OD & PP stand for, looking at the neogeo , supergun, jamma adapter

Thanks

pmgducati commented 1 year ago

Short answer is that OD is the one you need.

Darthcloud has OD (Open Drain) and PP (Push Pull) for Neo Geo and the 2600/SMS versions.

Here is the explanation from his repo:

Typical parallel input system simply use a switch between input line and GND which pull it low on button press. The input line idle high via a pull-up resistor in the console. To best emulate this behavior use the open drain schematic.

If for a specific application you need the line to be actively be driven high you can follow the Push-Pull variant.

I made both to provide a complete collection of cables. I have the OD version for my Neo Geo and it works great. I'm working on a internal version also.

brendan1495 commented 1 year ago

Thanks a lot for the explanation, I will get the OD version sent off for manufacture, look forward to the internal.

Again thanks