2 replies to this topic

[Happy_Dude]

I must be missing somthing

I set the ports to input

lda #0
sta CTLSWA

Then it should be a simple matter of loading SWCHA and checking for zeros
But thats not working for me.
Do I need to read the stick at a certain point (like in vblank) or somthing

[Mitch]

Here's some info form the 7800 dev kit.

How to use the right and left joystick buttons (7800 games only):

Initialize SWCHB with the following 4 instructions:



LDA  #$14

STA  CTLSWB

LDA  #0

STA  SWCHB





Read the fire buttons from:



INPT0   -  player 0, right button (d7=1 if pushed)

INPT1   -  player 0, left button  (d7=1 if pushed)

INPT2   -  player 1, right button (d7=1 if pushed)

INPT3   -  player 1, left button  (d7=1 if pushed)

Hope that helps.

Mitch

[Happy_Dude]

Thanks I only need 2 inputs at the moment so that helps a lot
But how on earth do you read the stick
All the source I have either AND's SWCHA or checks the bits.
And neither method works for me.