On Sun, Sep 10, 2000 at 12:52:51PM +0200, Jeroen Domburg wrote:

> Does anyone know if the big 144-pin Potatoe-IC inside the VMU has some
> general purpose I/O-pins left? IN the memory map I saw some vague
> references to 'P0', 'P2' and 'P3'. Are these general IO pins and, if yes,
> are they accessible as a pin on the chip?

Why do you need them? Sounds like an interesting project...

6 bits of P1 are connected to the external connector, 3 configured as
input, 3 configured as output, I don't know if there are extra drivers on
them preventing you to change the directions. Then there are 4 bits of
input to P7.

Another idea is P3, it is connected internally to the buttons, so if you
don't need them they are available as soon as your program is running.
There is a P3DDR register, so you could use them as outputs.

Soeren