GPIO adaptor - circuit diagram
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Hey all
Does anyone know if there is there a publicly available circuit diagram for the GPIO adapator for the SNES? The product appears to have been sold out for a long time and I thought I'd give my hand at making it from scratch.
Specifically,
- What is the chip at the very middle of the board ( http://blog.petrockblock.com/wp-content/uploads/2013/07/rpga2_4.jpg )
- What is the wiring for the 74HC125
- Voltage specifications
cheers!
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The GPIO schematics have always been in Supplementary Downloads on the official website:
http://blog.petrockblock.com/supplementary-downloads/retropie-gpio-adapter-schematics/
A parts list and explanation of the circuit is on the blog post announcing the adapter:
http://blog.petrockblock.com/2012/10/21/the-retropie-gpio-adapter/
Here is a higher quality image of the board:
http://blog.petrockblock.com/wp-content/uploads/2012/10/P1010401_small.jpg
AIUI the GPIO adapter is out of stock because it's been superseded by the ControlBlock:
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