Joystick Routines

; Robin's Joystick Routines
; Adapted from 8bitshowandtell.

joy2        = $dc00

    ;lda #$ff
    ;cmp $d012
    ;bne gameloop

up
    lda joy2
    and #1
    bne down
    dec spry

down
    lda joy2
    and #2
    bne left
    inc spry

left
    lda joy2
    and #4
    bne right
    dec sprx
    lda spry
    cmp #$ff
    bne right
    dec sprx+1

right
    lda joy2
    and #8
    bne button
    inc sprx
    bne button
    inc sprx+1

button
    lda joy2
    and #16
    bne updateall
    inc $d020



updateall