====== RS232 ======


pin remote cable wire color Description
1 brown GND?
2 blue GND? (I've used this as GND, only)
3 orange TX (output, low=0V, high=2.5V)
4 green +2.5V, additonal communication line?
5 yellow +2.5V, additonal communication line?
6 grey RX (input, low=0V, high=2.5V max?)
7 pink audio channel +600mV DC
8 red audio channel, pure AC
9 black audio GND
According to
http://forums.ps2dev.org/viewtopic.php?t=986
These are the colors used in standard psp remote cable.