dos33fsprogs/games/sb/draw_ducks.s
2023-03-13 23:55:12 -04:00

91 lines
1.1 KiB
ArmAsm

;====================
; draw duck1
;====================
draw_duck1:
lda D1_XPOS
sta XPOS
lda D1_YPOS
sta YPOS
lda D1_STATE
beq done_draw_duck1
bmi duck1_draw_right
duck1_draw_left:
lda #<d1_left1_mask
sta MASKL
lda #>d1_left1_mask
sta MASKH
lda #<d1_left1_sprite
sta INL
lda #>d1_left1_sprite
jmp do_draw_duck1
duck1_draw_right:
lda #<d1_right1_mask
sta MASKL
lda #>d1_right1_mask
sta MASKH
lda #<d1_right1_sprite
sta INL
lda #>d1_right1_sprite
do_draw_duck1:
sta INH
jsr gr_put_sprite_mask
done_draw_duck1:
rts
;====================
; draw duck2
;====================
draw_duck2:
lda D2_XPOS
sta XPOS
lda D2_YPOS
sta YPOS
lda D2_STATE
beq done_draw_duck2
bmi duck2_draw_right
duck2_draw_left:
lda #<d2_left1_mask
sta MASKL
lda #>d2_left1_mask
sta MASKH
lda #<d2_left1_sprite
sta INL
lda #>d2_left1_sprite
jmp do_draw_duck2
duck2_draw_right:
lda #<d2_right1_mask
sta MASKL
lda #>d2_right1_mask
sta MASKH
lda #<d2_right1_sprite
sta INL
lda #>d2_right1_sprite
do_draw_duck2:
sta INH
jsr gr_put_sprite_mask
done_draw_duck2:
rts