Sleeper RetroPie Cabinet

[transcendtient]

I have successfully stopped my screen blanking issues, I simply wired up external power to my HDMI to VGA.

[transcendtient]

I'm looking for a way to hook up more arcade buttons and I'm wondering if this will work for me.

He seems to be using it as output and I didn't know if this was a bidirectional chip.

http://wiringpi.com/extensions/spi-mcp23s08-mcp23s17/