Re: [stella] request for comments: RESCUE.BIN

Subject: Re: [stella] request for comments: RESCUE.BIN
From: Chris Wilkson - MCD <cwilkson@xxxxxxxxxxxxx>
Date: Fri, 26 Sep 1997 15:00:38 -0700 (PDT)
> Probably expense.. what else besides BASIC Programming could have used
> anything beyond the 12-key touch pad?  Also, with your setup, you can't
> press multiple keys at once.  The TIA does have separate inputs for each
> joystick direction, plus both buttons.  BTW, the number of combinations
> wouldn't be 5!, it'd be 2^5... minus one to signal "no button pressed".

Actually, it's exactly 2^5 = 32.  Thus my original 32-key keyboard.
(not the one that was prototyped) No buttons pressed is %00000 in a
"pressed = 1" world.

> I can't think of a way for a custom controller to do more than one button
> while retaining all four joystick directions, independent of the button.
> With an eight-way stick (four diagonals) and one button, there's eighteen
> possble configurations of stick and button (joystick in each of nine
> positions * two button position).  Adding a second button doubles that to
> 36 possible configurations, or more than the (2^5)-1 = 31 theoretical limit
> of the port.  Of course, you could add the second joystick port, but two
> buttons independent of an eight-way stick cannot be done in one port on the
> 2600.

Wanna bet?  You're thinking linearly.  Add an extra dimension to the
port (time) and you can have any number of buttons required.  The keyboard
I actually built used a technology that allowed 1k inputs, although I only
implemented 4 :)  The keyboard hogged both joystick ports, but it offered two
ports of its own.  When I stopped working on it, it only supported joysticks,
but support for other devices was planned.


Archives updated once/day at
Unsubscribing and other info at

Current Thread