lda $74
bne nojump2     ;if climbing -> no jump

lda $15         ;check joypad
cmp #$08
beq countercheck
cmp #$48
bne nojump

countercheck:     ;check if it's time to jump
lda $1528
cmp #$c0
beq jumpup
inc $1528

bra nojump2

jumpup:
lda #$08
sta $1dfc
lda #$81
sta $7d
stz $149b

nojump:         ;reset counter
stz $1528
nojump2:
rtl