mirror of
https://gitlab.com/xCrystal/pokecrystal-board.git
synced 2024-09-09 09:51:34 -07:00
490 lines
7.3 KiB
NASM
490 lines
7.3 KiB
NASM
JoypadInt:: ; 92e
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; Replaced by Joypad, called from VBlank instead of the useless
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; joypad interrupt.
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; This is a placeholder in case the interrupt is somehow enabled.
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reti
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; 92f
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ClearJoypad:: ; 92f
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xor a
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; Pressed this frame (delta)
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ld [hJoyPressed], a
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; Currently pressed
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ld [hJoyDown], a
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ret
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; 935
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Joypad:: ; 935
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; Read the joypad register and translate it to something more
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; workable for use in-game. There are 8 buttons, so we can use
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; one byte to contain all player input.
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; Updates:
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; hJoypadReleased: released this frame (delta)
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; hJoypadPressed: pressed this frame (delta)
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; hJoypadDown: currently pressed
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; hJoypadSum: pressed so far
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; Any of these three bits can be used to disable input.
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ld a, [wcfbe]
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and %11010000
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ret nz
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; If we're saving, input is disabled.
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ld a, [wc2cd]
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and a
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ret nz
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; We can only get four inputs at a time.
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; We take d-pad first for no particular reason.
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ld a, D_PAD
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ld [rJOYP], a
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; Read twice to give the request time to take.
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rept 2
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ld a, [rJOYP]
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endr
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; The Joypad register output is in the lo nybble (inversed).
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; We make the hi nybble of our new container d-pad input.
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cpl
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and $f
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swap a
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; We'll keep this in b for now.
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ld b, a
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; Buttons make 8 total inputs (A, B, Select, Start).
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; We can fit this into one byte.
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ld a, BUTTONS
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ld [rJOYP], a
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; Wait for input to stabilize.
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rept 6
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ld a, [rJOYP]
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endr
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; Buttons take the lo nybble.
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cpl
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and $f
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or b
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ld b, a
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; Reset the joypad register since we're done with it.
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ld a, $30
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ld [rJOYP], a
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; To get the delta we xor the last frame's input with the new one.
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ld a, [hJoypadDown] ; last frame
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ld e, a
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xor b
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ld d, a
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; Released this frame:
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and e
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ld [hJoypadReleased], a
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; Pressed this frame:
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ld a, d
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and b
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ld [hJoypadPressed], a
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; Add any new presses to the list of collective presses:
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ld c, a
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ld a, [hJoypadSum]
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or c
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ld [hJoypadSum], a
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; Currently pressed:
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ld a, b
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ld [hJoypadDown], a
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; Now that we have the input, we can do stuff with it.
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; For example, soft reset:
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and A_BUTTON | B_BUTTON | SELECT | START
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cp A_BUTTON | B_BUTTON | SELECT | START
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jp z, Reset
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ret
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; 984
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GetJoypad:: ; 984
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; Update mirror joypad input from hJoypadDown (real input)
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; hJoyReleased: released this frame (delta)
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; hJoyPressed: pressed this frame (delta)
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; hJoyDown: currently pressed
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; bit 0 A
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; 1 B
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; 2 SELECT
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; 3 START
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; 4 RIGHT
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; 5 LEFT
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; 6 UP
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; 7 DOWN
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push af
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push hl
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push de
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push bc
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; The player input can be automated using an input stream.
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; See more below.
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ld a, [InputType]
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cp a, AUTO_INPUT
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jr z, .auto
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; To get deltas, take this and last frame's input.
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ld a, [hJoypadDown] ; real input
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ld b, a
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ld a, [hJoyDown] ; last frame mirror
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ld e, a
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; Released this frame:
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xor b
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ld d, a
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and e
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ld [hJoyReleased], a
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; Pressed this frame:
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ld a, d
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and b
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ld [hJoyPressed], a
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; It looks like the collective presses got commented out here.
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ld c, a
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; Currently pressed:
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ld a, b
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ld [hJoyDown], a ; frame input
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.quit
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pop bc
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pop de
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pop hl
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pop af
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ret
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.auto
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; Use a predetermined input stream (used in the catching tutorial).
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; Stream format: [input][duration]
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; A value of $ff will immediately end the stream.
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; Read from the input stream.
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ld a, [hROMBank]
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push af
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ld a, [AutoInputBank]
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rst Bankswitch
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ld hl, AutoInputAddress
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ld a, [hli]
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ld h, [hl]
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ld l, a
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; We only update when the input duration has expired.
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ld a, [AutoInputLength]
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and a
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jr z, .updateauto
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; Until then, don't change anything.
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dec a
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ld [AutoInputLength], a
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pop af
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rst Bankswitch
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jr .quit
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.updateauto
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; An input of $ff will end the stream.
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ld a, [hli]
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cp a, $ff
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jr z, .stopauto
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ld b, a
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; A duration of $ff will end the stream indefinitely.
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ld a, [hli]
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ld [AutoInputLength], a
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cp a, $ff
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jr nz, .next
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; The current input is overwritten.
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rept 2
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dec hl
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endr
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ld b, NO_INPUT
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jr .finishauto
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.next
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; On to the next input...
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ld a, l
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ld [AutoInputAddress], a
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ld a, h
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ld [AutoInputAddress+1], a
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jr .finishauto
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.stopauto
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call StopAutoInput
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ld b, NO_INPUT
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.finishauto
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pop af
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rst Bankswitch
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ld a, b
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ld [hJoyPressed], a ; pressed
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ld [hJoyDown], a ; input
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jr .quit
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; 9ee
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StartAutoInput:: ; 9ee
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; Start reading automated input stream at a:hl.
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ld [AutoInputBank], a
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ld a, l
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ld [AutoInputAddress], a
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ld a, h
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ld [AutoInputAddress+1], a
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; Start reading the stream immediately.
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xor a
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ld [AutoInputLength], a
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; Reset input mirrors.
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xor a
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ld [hJoyPressed], a ; pressed this frame
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ld [hJoyReleased], a ; released this frame
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ld [hJoyDown], a ; currently pressed
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ld a, AUTO_INPUT
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ld [InputType], a
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ret
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; a0a
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StopAutoInput:: ; a0a
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; Clear variables related to automated input.
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xor a
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ld [AutoInputBank], a
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ld [AutoInputAddress], a
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ld [AutoInputAddress+1], a
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ld [AutoInputLength], a
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; Back to normal input.
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ld [InputType], a
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ret
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; a1b
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Functiona1b:: ; a1b
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call DelayFrame
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push bc
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call Functiona57
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pop bc
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ld a, [hJoyDown]
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cp D_UP | SELECT | B_BUTTON
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jr z, .asm_a34
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ld a, [$ffa9]
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and START | A_BUTTON
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jr nz, .asm_a34
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dec c
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jr nz, Functiona1b
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and a
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ret
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.asm_a34
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scf
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ret
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; a36
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Functiona36:: ; a36
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call DelayFrame
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call GetJoypad
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ld a, [hJoyPressed]
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and A_BUTTON | B_BUTTON
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ret nz
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call RTC
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jr Functiona36
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; a46
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CloseText:: ; a46
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ld a, [hOAMUpdate]
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push af
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ld a, 1
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ld [hOAMUpdate], a
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call WaitBGMap
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call Functiona36
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pop af
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ld [hOAMUpdate], a
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ret
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; a57
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Functiona57:: ; a57
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call GetJoypad
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ld a, [$ffaa]
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and a
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ld a, [hJoyPressed]
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jr z, .asm_a63
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ld a, [hJoyDown]
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.asm_a63
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ld [$ffa9], a
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ld a, [hJoyPressed]
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and a
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jr z, .asm_a70
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ld a, 15
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ld [TextDelayFrames], a
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ret
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.asm_a70
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ld a, [TextDelayFrames]
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and a
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jr z, .asm_a7a
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xor a
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ld [$ffa9], a
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ret
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.asm_a7a
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ld a, 5
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ld [TextDelayFrames], a
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ret
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; a80
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Functiona80:: ; a80
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ld a, [hConnectionStripLength]
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push af
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ld a, [$ffb0]
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push af
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xor a
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ld [hConnectionStripLength], a
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ld a, $6
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ld [$ffb0], a
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.asm_a8d
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push hl
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hlcoord 18, 17
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call Functionb06
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pop hl
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call Functiona57
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ld a, [$ffa9]
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and $3
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jr z, .asm_a8d
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pop af
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ld [$ffb0], a
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pop af
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ld [hConnectionStripLength], a
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ret
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; aa5
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Functionaa5:: ; aa5
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call Functiona57
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ld a, [$ffa9]
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and A_BUTTON | B_BUTTON
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jr z, Functionaa5
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ret
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; aaf
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KeepTextOpen:: ; aaf
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ld a, [InLinkBattle]
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and a
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jr nz, .asm_ac1
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call Functionac6
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push de
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ld de, SFX_READ_TEXT_2
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call PlaySFX
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pop de
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ret
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.asm_ac1
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ld c, 65
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jp DelayFrames
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; ac6
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Functionac6:: ; ac6
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ld a, [hOAMUpdate]
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push af
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ld a, $1
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ld [hOAMUpdate], a
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ld a, [InputType]
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or a
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jr z, .asm_ad9
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callba Function1de28a
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.asm_ad9
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call Functionaf5
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call Functiona57
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ld a, [hJoyPressed]
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and $3
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jr nz, .asm_af1
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call RTC
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ld a, $1
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ld [hBGMapMode], a
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call DelayFrame
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jr .asm_ad9
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.asm_af1
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pop af
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ld [hOAMUpdate], a
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ret
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; af5
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Functionaf5:: ; af5
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ld a, [$ff9b]
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and $10
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jr z, .asm_aff
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ld a, $ee
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jr .asm_b02
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.asm_aff
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ld a, [TileMap + 17 + 17 * SCREEN_WIDTH]
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.asm_b02
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ld [TileMap + 18 + 17 * SCREEN_WIDTH], a
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ret
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; b06
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Functionb06:: ; b06
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push bc
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ld a, [hl]
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ld b, a
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ld a, $ee
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cp b
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pop bc
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jr nz, .asm_b27
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ld a, [hConnectionStripLength]
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dec a
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ld [hConnectionStripLength], a
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ret nz
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ld a, [$ffb0]
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dec a
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ld [$ffb0], a
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ret nz
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ld a, $7a
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ld [hl], a
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ld a, $ff
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ld [hConnectionStripLength], a
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ld a, $6
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ld [$ffb0], a
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ret
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.asm_b27
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ld a, [hConnectionStripLength]
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and a
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ret z
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dec a
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ld [hConnectionStripLength], a
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ret nz
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dec a
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ld [hConnectionStripLength], a
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ld a, [$ffb0]
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dec a
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ld [$ffb0], a
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ret nz
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ld a, $6
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ld [$ffb0], a
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ld a, $ee
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ld [hl], a
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ret
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; b40
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