Subject: [stella] debounce From: "TwoHeaded Software" <adavie@xxxxxxxxxxxxx> Date: Tue, 11 Sep 2001 20:18:44 +1000 |
> This does exactly what I want it to, except one thing: the fire button still > acts wonky on the Atari. What's the normal way to debounce the fire button? I I was pretty pleased with my debounce code for the console switches in Qb. With minor modification this can work for joystick buttons, too... GetState sta temp and SWCHB cmp #1 ror eor #D7 and temp+1 ; D1 SWCHB -> D7 asl rol temp+1 ; sneaky! keep C on D0 lda SWCHB eor #3 and #3 beq SW2 ; both NOT pressed -> enable both and temp beq SW3 ; THIS one NOT pressed? clc bcc SW3 SW2 sec SW3 ror temp+1 ; if button pressed, -> 0 (and D0->C) rts Buggered if I can figure out how it works, now ;) The above code will debounce any console switch, passed in A. Usage is... lda #D1 ; SELECT jsr GetState bcc CheckReset Cheers A - Andrew Davie, TwoHeaded Software adavie@xxxxxxxxxxxxx - Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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