mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-06-20 01:29:36 +00:00
205 lines
2.2 KiB
ArmAsm
205 lines
2.2 KiB
ArmAsm
|
; Handle blast
|
||
|
|
|
||
|
|
blast0_out: .byte $0
|
||
|
|
blast0_start: .byte $0
|
||
|
|
blast0_end: .byte $0
|
||
|
|
blast0_y: .byte $0
|
||
|
|
blast0_direction: .byte $0
|
||
|
|
blast0_count: .byte $0
|
||
|
|
|
||
|
|
;=========================
|
||
|
|
; fire blast
|
||
|
|
;=========================
|
||
|
|
|
||
|
|
fire_blast:
|
||
|
|
|
||
|
|
lda blast0_out
|
||
|
|
bne done_fire_blast
|
||
|
|
|
||
|
|
; activate blast slot
|
||
|
|
|
||
|
|
inc blast0_out
|
||
|
|
|
||
|
|
; reset count
|
||
|
|
|
||
|
|
lda #0
|
||
|
|
sta blast0_count
|
||
|
|
|
||
|
|
; set y
|
||
|
|
|
||
|
|
lda PHYSICIST_Y
|
||
|
|
clc
|
||
|
|
adc #4
|
||
|
|
sta blast0_y
|
||
|
|
|
||
|
|
; set direction
|
||
|
|
|
||
|
|
lda DIRECTION
|
||
|
|
sta blast0_direction
|
||
|
|
|
||
|
|
beq blast_left
|
||
|
|
bne blast_right
|
||
|
|
|
||
|
|
; set x
|
||
|
|
|
||
|
|
blast_left:
|
||
|
|
|
||
|
|
ldx PHYSICIST_X
|
||
|
|
dex
|
||
|
|
stx blast0_end
|
||
|
|
|
||
|
|
txa
|
||
|
|
sec
|
||
|
|
sbc #10
|
||
|
|
sta blast0_start
|
||
|
|
|
||
|
|
jmp done_fire_blast
|
||
|
|
|
||
|
|
blast_right:
|
||
|
|
|
||
|
|
lda PHYSICIST_X
|
||
|
|
clc
|
||
|
|
adc #5
|
||
|
|
sta blast0_start
|
||
|
|
|
||
|
|
clc
|
||
|
|
adc #10
|
||
|
|
sta blast0_end
|
||
|
|
|
||
|
|
done_fire_blast:
|
||
|
|
rts
|
||
|
|
|
||
|
|
|
||
|
|
;====================
|
||
|
|
; draw blast
|
||
|
|
;====================
|
||
|
|
|
||
|
|
draw_blast:
|
||
|
|
|
||
|
|
lda blast0_out
|
||
|
|
beq done_draw_blast
|
||
|
|
|
||
|
|
lda #$f6
|
||
|
|
sta hlin_color_smc+1
|
||
|
|
|
||
|
|
lda #$00
|
||
|
|
sta hlin_mask_smc+1
|
||
|
|
|
||
|
|
ldy blast0_y
|
||
|
|
|
||
|
|
sec
|
||
|
|
lda blast0_end
|
||
|
|
sbc blast0_start
|
||
|
|
tax
|
||
|
|
|
||
|
|
lda blast0_start
|
||
|
|
|
||
|
|
jsr hlin
|
||
|
|
|
||
|
|
done_draw_blast:
|
||
|
|
|
||
|
|
rts
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
;===================
|
||
|
|
; move blast
|
||
|
|
;===================
|
||
|
|
move_blast:
|
||
|
|
lda blast0_out
|
||
|
|
beq done_move_blast
|
||
|
|
|
||
|
|
; slow down blast
|
||
|
|
lda blast0_count
|
||
|
|
and #$3
|
||
|
|
bne no_move_blast
|
||
|
|
|
||
|
|
lda blast0_direction
|
||
|
|
bne move_blast_right
|
||
|
|
|
||
|
|
move_blast_left:
|
||
|
|
|
||
|
|
lda blast0_count
|
||
|
|
cmp #4
|
||
|
|
bcc still_starting_blast_left
|
||
|
|
cmp #8
|
||
|
|
bcc still_shooting_blast_left
|
||
|
|
|
||
|
|
continue_shooting_blast_left:
|
||
|
|
still_shooting_blast_left:
|
||
|
|
|
||
|
|
lda blast0_end
|
||
|
|
sec
|
||
|
|
sbc #10
|
||
|
|
sta blast0_end
|
||
|
|
|
||
|
|
still_starting_blast_left:
|
||
|
|
|
||
|
|
lda blast0_start
|
||
|
|
sec
|
||
|
|
sbc #10
|
||
|
|
sta blast0_start
|
||
|
|
|
||
|
|
blast_edge_detect_left:
|
||
|
|
|
||
|
|
lda blast0_end
|
||
|
|
bmi disable_blast
|
||
|
|
|
||
|
|
lda blast0_start
|
||
|
|
bpl no_move_blast
|
||
|
|
|
||
|
|
lda #0
|
||
|
|
sta blast0_start
|
||
|
|
|
||
|
|
jmp no_move_blast
|
||
|
|
|
||
|
|
|
||
|
|
move_blast_right:
|
||
|
|
|
||
|
|
lda blast0_count
|
||
|
|
cmp #4
|
||
|
|
bcc still_starting_blast_right
|
||
|
|
cmp #8
|
||
|
|
bcc still_shooting_blast_right
|
||
|
|
|
||
|
|
continue_shooting_blast_right:
|
||
|
|
lda blast0_start
|
||
|
|
clc
|
||
|
|
adc #10
|
||
|
|
sta blast0_start
|
||
|
|
|
||
|
|
still_shooting_blast_right:
|
||
|
|
lda blast0_end
|
||
|
|
clc
|
||
|
|
adc #10
|
||
|
|
sta blast0_end
|
||
|
|
|
||
|
|
still_starting_blast_right:
|
||
|
|
|
||
|
|
blast_edge_detect_right:
|
||
|
|
|
||
|
|
; detect if totally off screen
|
||
|
|
lda blast0_start
|
||
|
|
cmp #40
|
||
|
|
bcs disable_blast
|
||
|
|
|
||
|
|
lda blast0_end
|
||
|
|
cmp #40
|
||
|
|
bcc no_move_blast
|
||
|
|
|
||
|
|
lda #39
|
||
|
|
sta blast0_end
|
||
|
|
|
||
|
|
no_move_blast:
|
||
|
|
inc blast0_count
|
||
|
|
|
||
|
|
done_move_blast:
|
||
|
|
|
||
|
|
rts
|
||
|
|
|
||
|
|
disable_blast:
|
||
|
|
lda #0
|
||
|
|
sta blast0_out
|
||
|
|
rts
|
||
|
|
|