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- _Joypad::
- ; hJoyReleased: (hJoyLast ^ hJoyInput) & hJoyLast
- ; hJoyPressed: (hJoyLast ^ hJoyInput) & hJoyInput
- ld a, [hJoyInput]
- cp A_BUTTON + B_BUTTON + SELECT + START ; soft reset
- jp z, TrySoftReset
- ld b, a
- ld a, [hJoyLast]
- ld e, a
- xor b
- ld d, a
- and e
- ld [hJoyReleased], a
- ld a, d
- and b
- ld [hJoyPressed], a
- ld a, b
- ld [hJoyLast], a
- ld a, [wd730]
- bit 5, a
- jr nz, DiscardButtonPresses
- ld a, [hJoyLast]
- ld [hJoyHeld], a
- ld a, [wJoyIgnore]
- and a
- ret z
- cpl
- ld b, a
- ld a, [hJoyHeld]
- and b
- ld [hJoyHeld], a
- ld a, [hJoyPressed]
- and b
- ld [hJoyPressed], a
- ret
- DiscardButtonPresses:
- xor a
- ld [hJoyHeld], a
- ld [hJoyPressed], a
- ld [hJoyReleased], a
- ret
- TrySoftReset:
- call DelayFrame
- ; deselect (redundant)
- ld a, $30
- ld [rJOYP], a
- ld hl, hSoftReset
- dec [hl]
- jp z, SoftReset
- jp Joypad
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