Restoring registers after RTS ok, but flags ?

[Mariano DM]

Hello.

 

I'm baffled by a nasty bug in cc65

I have a sound routine. it kind of works (i hear sound).

I use the conventional tmp1-3 pz locations for arguments.

everything is ok until I call it.
 

then PEEK(KBCODE); stops working! I even added a print and it returns 255.

 

    #define KBCODE 764 
    key=PEEK(KBCODE); // pressed key
    cputcxy(0,10,key);
    J=PEEK(STICK0);

    if(key!=255 || J!=15) {
...
    }
     POKE(KBCODE,255); //clear keyboard buffer

Sound routine (included) is nothing special. the only other thing that it uses is X register, but it does not matter if I restore it or not.

Is there anything that can move the keyboard location ?

Thanks !

 

atari_lib.s

[Mariano DM]

Weird enough. It fails in real Atari and altirra.

atari 800 works good.

[phaeron]

       stx SKCTL     ;init sound

 

This is turning off keyboard debounce and/or scan, which kills the keyboard. Should be STA instead of STX.

 

[Mariano DM]

thank you thank you !

 

I passed many times the code and did not spotted.

working great now !