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62 lines
740 B
ArmAsm
62 lines
740 B
ArmAsm
; draw/move laser
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;====================
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; move laser
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;====================
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move_laser:
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lda LASER_OUT
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beq done_move_laser
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lda LASER_X
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clc
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adc LASER_DIRECTION
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sta LASER_X
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cmp #31
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bcc not_too_far_right
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lda #0
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sta LASER_OUT
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beq done_move_laser
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not_too_far_right:
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cmp #6
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bcs done_move_laser
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lda #0
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sta LASER_OUT
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done_move_laser:
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rts
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;====================
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; draw laser
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;====================
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draw_laser:
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lda LASER_OUT
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beq done_draw_laser
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lda LASER_X
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sta XPOS
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lda LASER_Y
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sta YPOS
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; lda LASER_DIRECTION
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lda #<laser_sideways_sprite
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sta INL
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lda #>laser_sideways_sprite
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sta INH
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jsr put_sprite_crop
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done_draw_laser:
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rts
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laser_sideways_sprite:
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.byte 4,1
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; .byte $3A,$cA,$3A,$cA
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.byte $A3,$Ac,$A3,$Ac
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