Subject: Re: [stella] Y Adapter From: "Eckhard Stolberg" <Eckhard_Stolberg@xxxxxx> Date: Wed, 13 Feb 2002 22:24:00 +0100 |
> The way SWCHA maps to the controller ports: > > [L] [R] <-PORT > 7654 3210 <-DATA BITS > 4321 4321 <-PORT PIN NUMBERS > RLDU RLDU <-JOYSTICK DIRECTIONS > 11XX 11XX <-X = driving controller grey code Actually the last line is supposed to be: XX11 XX11 <-X = driving controller grey code And for reading the the Booster Grip: Yes, you must ground the capacitors each frame through bit 7 of VBLANK. Otherwise they won't return to '1' when the button is released. Also, if you want to allow the Colecovision joystick (or a modified Proline controller) as an alternative, you should make sure that you read the normal joystick button while the capacitors are not grounded. The CV stick connects the button line with one of the paddle lines. If you read the normal button while the capacitors are grounded, you would get false triggers, when the second button is pressed. (Sorry Thomas, I think I got that the wrong way round the the e-mail I sent you). Ciao, Eckhard Stolberg ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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