Subject: Re: [stella] How to detect that joystick button is pressed From: Jim Nitchals <jimn8@xxxxxxxxxx> Date: Tue, 28 Oct 1997 04:24:52 -0800 (PST) |
> > LDA INPT4 ; It always returns > BNE NoButton ; the same value !! It doesn't. Only the most significant bit of the port is used. All other data bits are undefined, so with the Stella 0.7 emulator for example, INPT4 will return either $7F or $FF. What you want is: LDA INPT4 BMI NoButton HTH. *****NOTE: please cc: all email to jimn8@xxxxxxxxx until Netcom fixes its shell account mail system. -- Archives updated once/day at http://www.biglist.com/lists/stella/archives/ Unsubscribing and other info at http://www.biglist.com/lists/stella/stella.html
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