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|
;
; player update code
;
player_update:
ld x, [sp + 2]
ld a, [sp + 3]
; read controller 1
ld b, 0xf0
port b, b
inc x
bo
inc a
; x coord
ld y, [a : x]
; left
bit b, 4
bz
dec y
; right
bit b, 5
bz
inc y
ld [a : x], y
inc x
bo
inc a
; y coord
ld y, [a : x]
; up
bit b, 2
bz
dec y
; down
bit b, 3
bz
inc y
ld [a : x], y
; update frame
inc x
bo
inc a
; base frame
ld y, 0
; both left and right
and b, 48
cmp b, 48
bz
jmp player_store_frame
; left
bit b, 4
bz
ld y, 2
; right
bit b, 5
bz
ld y, 1
player_store_frame:
ld [a : x], y
ret
|
