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sprites: sparkle flame

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not sure if too distracting
This commit is contained in:
Vince Weaver 2019-06-13 14:55:40 -04:00
parent 9231a149c7
commit 4496822aef
1 changed files with 68 additions and 4 deletions
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72
interlace_demo/sprites.s
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@ -255,9 +255,10 @@ display_loop:
; -61 -- keypress
; -33 -- handle fire press
; -51 -- exploding asteroid
; -47 -- sparkle
; -8 -- loop
;=======
; 325
; 278
; -40 nop sled
@ -782,6 +783,64 @@ draw_asteroid:
; 348
;==================
; sparkle flame
;==================
; 14+20+13 = 47
sparkle_flame:
inc FRAME ; 5
lda FRAME ; 3
and #$7 ; 2
asl ; 2
tay ; 2
; Set up jump table that runs same speed on 6502 and 65c02
lda jump_table+1,y ; 4
pha ; 3
lda jump_table,y ; 4
pha ; 3
rts ; 6
;=============
; 20
jump_table:
.word (sparkle1-1),(sparkle_motion-1),(sparkle2-1),(sparkle_motion-1)
.word (sparkle3-1),(sparkle_motion-1),(sparkle4-1),(sparkle_motion-1)
sparkle1:
lda ship_sprite_l9+0 ; 4
eor #$88 ; 2
sta ship_sprite_l9+0 ; 4
jmp done_sparkle ; 3
sparkle2:
lda ship_sprite_l9+1 ; 4
eor #$88 ; 2
sta ship_sprite_l9+1 ; 4
jmp done_sparkle ; 3
sparkle3:
lda ship_sprite_l8+0 ; 4
eor #$44 ; 2
sta ship_sprite_l8+0 ; 4
jmp done_sparkle ; 3
sparkle4:
lda ship_sprite_l10+0 ; 4
eor #$44 ; 2
sta ship_sprite_l10+0 ; 4
jmp done_sparkle ; 3
sparkle_motion:
lda TEMP ; 3
lda TEMP ; 3
nop
nop
jmp done_sparkle ; 3
done_sparkle:
pad_time:
@ -805,12 +864,14 @@ pad_time:
wait_loop:
; Try X=27 Y=2 cycles=283R2
; Try X=3 Y=11 cycles=232 R6
nop
nop
nop
ldy #2 ; 2
loop1: ldx #27 ; 2
ldy #11 ; 2
loop1: ldx #3 ; 2
loop2: dex ; 2
bne loop2 ; 2nt/3
dey ; 2
@ -1297,10 +1358,13 @@ ship_sprite:
; l7:
.byte $00,$dd,$66,$11,$22,$22,$00
; l8:
ship_sprite_l8:
.byte $dd,$99,$22,$44,$44,$22,$22
; l9:
ship_sprite_l9:
.byte $99,$11,$66,$ff,$ff,$22,$22
; l10:
ship_sprite_l10:
.byte $dd,$99,$22,$ff,$ff,$22,$22
; l11:
.byte $00,$dd,$66,$77,$77,$77,$ff