>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...

Well, I do lots of stuff concerning microcontrollers and electronics, and I
thought I might use the VMU for things like a tiny logic analyzer or scope.

>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.

Are these pins configurable as outputs to? If they are, that would do just
the trick. And do you have any idea to which pins of the Potato they are
connected?

>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.

Neah, I like the buttons...

But I read something about a P4 and P0 port too. Do you know anything about
these ones?

Anyway, thanxx for the reaction.

>Soeren

Jeroen Domburg
'------------------{ Signature follows: }------------------


(This signature has intentionally been left blank)

Jeroen Domburg
Domburg@...
Jeroen@...
Sprite_JD@...