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- ldx $4016
- sta
- rla
- ldx $4016
- orx
- rla
- ldx $4016
- orx
- rla
- ldx $4016
- orx
- rla
- ldx $4016
- orx
- rla
- ldx $4016
- orx
- rla
- ldx $4016
- orx
- rla
- ldx $4016
- orx
- lax
- ldy $4017
- sta
- rla
- ldy $4017
- ory
- rla
- ldy $4017
- ory
- rla
- ldy $4017
- ory
- rla
- ldy $4017
- ory
- rla
- ldy $4017
- ory
- rla
- ldy $4017
- ory
- rla
- ldy $4017
- ory
- lay
- ;- below, from patater.com tutorial
- ;lda $4016 ; read for A key.
- ;and #1 ; check to see if down.
- ;bne WasDown ; branch if it was down.
- ;lda $4016 ; read for B key.
- ;lda $4016 ; read for SELECT
- ;lda $4016 ; read START status
- ;and #1 ; see if down.
- ;bne StartDown ; branch if down.
- ;lda $4016 ; UP
- ;lda $4016 ; DOWN
- ;lda $4016 ; LEFT
- ;lda $4016 ; RIGHT
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