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Hardware > Interfacing with gba's serial port in parallel mode

#128074 - Magnetic_dud - Tue May 08, 2007 10:15 am

I'd like to do a "GBA DDR", so i was looking an easy way to connect my custom dance mat to the gba.
I think the link port in general mode is the best way: 4 inputs
Just short-circuit SD/SI/SC/SO with the +5v and read on 0x0400134 the results on bits 0-3, right?

I've tried a "client-server" app on no$gba and it works this way.
For some reason, on vbalink it doesn't communicate. Maybe vbalink only support "standard" protocol

If a day i buy the nds and i want to port it, what are the ways to interface? Only the serial on the passme? What serial protocol is used on the passme? Easy stuff that can be converted to 8-bit parallel with a PIC, right?