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Func_18661: ; unreferenced
xor a
ld [wPlaysSfx], a
ld a, [wCheckMenuCursorXPosition]
ld d, a
ld a, [wCheckMenuCursorYPosition]
ld e, a
ldh a, [hDPadHeld]
or a
jr z, .check_button
; check input from dpad
bit D_LEFT_F, a
jr nz, .left_or_right
bit D_RIGHT_F, a
jr z, .check_up_and_down
.left_or_right
; swap the lsb of x position value.
ld a, d
xor $1
ld d, a
jr .cursor_moved
.check_up_and_down
bit D_UP_F, a
jr nz, .up_or_down
bit D_DOWN_F, a
jr z, .check_button
.up_or_down
ld a, e
xor $1
ld e, a
.cursor_moved
ld a, $1
ld [wPlaysSfx], a
push de
call .draw_blank_cursor
pop de
ld a, d
ld [wCheckMenuCursorXPosition], a
ld a, e
ld [wCheckMenuCursorYPosition], a
xor a
ld [wCheckMenuCursorBlinkCounter], a
.check_button
ldh a, [hKeysPressed]
and A_BUTTON | B_BUTTON
jr z, .check_cursor_moved
and A_BUTTON
jr nz, .a_button
; b button
ld a, -1
call Func_190fb
scf
ret
; a button
.a_button
call .draw_cursor
ld a, 1
call Func_190fb
scf
ret
.check_cursor_moved
ld a, [wPlaysSfx]
or a
jr z, .check_cursor_blink
call PlaySFX
.check_cursor_blink
ld hl, wCheckMenuCursorBlinkCounter
ld a, [hl]
inc [hl]
and %00001111
ret nz
ld a, SYM_CURSOR_R
bit D_RIGHT_F, [hl]
jr z, .draw_tile
.draw_blank_cursor
ld a, SYM_SPACE
.draw_tile
ld e, a
ld a, 10
ld l, a
ld a, [wCheckMenuCursorXPosition]
ld h, a
call HtimesL
ld a, l
add 1
ld b, a
ld a, [wCheckMenuCursorYPosition]
sla a
add 14
ld c, a
ld a, e
; b = 11, c = y_pos * 2 + 14
; h = x_pos * 10, l = 10
call WriteByteToBGMap0
or a
ret
.draw_cursor
ld a, SYM_CURSOR_R
jr .draw_tile
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