[stella] hooking up a keyboard to the VCS

[adam at cuddlepuddle.org]

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On Mon, 11 Sep 2006, Glenn Saunders wrote:
> The Stowaway keyboard
> for old Palm PDAs outputs standard RS232 serial ASCII
> streams.

Funny you should bring that up; I was thinking about something similar
the other morning.

Seems to me, there isn't any reason you couldn't wire a standard PS/2
keyboard directly to the DB9.  PS/2 keyboards run at 5V, and it's
clocked serial.  The touchest part would be for the VCs to generate a
20 KHz clock signal, but it doesn't have to do this all the time, so you
could read scancodes during the video blank.

See http://www.beyondlogic.org/keyboard/keybrd.htm

This might be a cool library to write for folks to us.

That and a little more, and I think I could have nethack running on the
2600... =)

- --
adam at cuddlepuddle.org      http://cuddlepuddle.org/~adam      KG6GZR
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