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megademo: takeoff

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delay is not working :( :(
This commit is contained in:
Vince Weaver 2018-10-19 00:30:57 -04:00
parent 3a6fba1488
commit 5f802cc085
1 changed files with 139 additions and 18 deletions
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151
megademo/takeoff.s
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@ -3,13 +3,10 @@
; Simple HGR/GR split
; STATE1 = RIDE IN ON BIRD
; STATE2 = OFF BIRD
; STATE3 = BIRD RUNS AWAY
; STATE4 = WALK INTO SHIP
; STATE5 = PAUSE
; STATE6 = SMOKE OUT BACK
; STATE7 = ROTATING FLAME SPRITES + TREES MOVING/SPEED UP
; STATE0 = RIDE IN ON BIRD
; STATE2 = BIRD RUNS / WALK INTO SHIP
; STATE4 = PAUSE / SMOKE OUT BACK
; STATE6 = ROTATING / FLAME SPRITES + TREES MOVING/SPEED UP
; also horizon drop away?
@ -30,7 +27,10 @@ setup_rocket:
lda #0
sta DRAW_PAGE
sta FRAME
sta FRAMEH
sta XPOS
sta STATE
;=============================
; Load graphic hgr
@ -120,7 +120,7 @@ toloopB:dex ; 2
;================================================
; Starring People Loop
; Takeoff Loop
;================================================
; each scan line 65 cycles
; 1 cycle each byte (40cycles) + 25 for horizontal
@ -148,6 +148,16 @@ toloop9:dex ; 2
dey ; 2
bne toloop8 ; 2nt/3
;===========================
; Draw Lores bottom
; 144 * 65 = 9360
; -4 swith to LORES
;====================
; 9356
bit LORES ; 4
; Try X=10 Y=167 cycles=9353 R3
@ -167,27 +177,45 @@ toloop7:dex ; 2
;======================================================
; do_nothing should be 4550
; -23 state jump
; -3589 state
; -10 keypress
; ===========
; 4540
; 928
; Try X=9 Y=89 cycles=4540
; Try X=13 Y=13 cycles=924 R4
ldy #89 ; 2
toloop1:ldx #9 ; 2
nop
nop
ldy #13 ; 2
toloop1:ldx #13 ; 2
toloop2:dex ; 2
bne toloop2 ; 2nt/3
dey ; 2
bne toloop1 ; 2nt/3
; Set up jump table that runs same speed on 6502 and 65c02
ldy STATE ; 3
lda to_jump_table+1,y ; 4
pha ; 3
lda to_jump_table,y ; 4
pha ; 3
rts ; 6
;=============
; 23
to_done_state:
lda KEYPRESS ; 4
bpl to_no_keypress ; 3
jmp to_start_over
jmp to_exit
to_no_keypress:
jmp to_begin_loop ; 3
to_start_over:
to_exit:
bit KEYRESET ; clear keypress ; 4
rts ; 6
@ -196,3 +224,96 @@ to_start_over:
;takeoff_hgr:
;.incbin "takeoff.img.lz4",11
;takeoff_hgr_end:
to_jump_table:
.word (to_state0-1)
.word (to_state2-1)
.word (to_state0-1)
.word (to_state0-1)
;============================
; state0: Draw+move Bird+Rider
;============================
; 13 + 2208 + 1365 + 3 = 3589
to_state0:
lda #20 ; 2
sta YPOS ; 3
lda FRAMEH ; 3
and #$1 ; 2
beq to_bwalk ; 3
;===========
; 13
to_bstand:
; draw bird/rider standing ; -1
lda #>bird_rider_stand_right ; 2
sta INH ; 3
lda #<bird_rider_stand_right ; 2
sta INL ; 3
jsr put_sprite ; 6
jmp to_done_bwalk ; 3
;=========
; 18 + 2190 = 2208
to_bwalk:
; draw bird/rider walking
lda #>bird_rider_walk_right ; 2
sta INH ; 3
lda #<bird_rider_walk_right ; 2
sta INL ; 3
jsr put_sprite ; 6
nop ; 2
inc TFV_Y ; 5
inc TFV_Y ; 5
inc TFV_Y ; 5
;=========
; 33 + 2175 = 2208
to_done_bwalk:
; delay
; Try X=67 Y=4 cycles=1365
ldy #4 ; 2
toloopV:ldx #67 ; 2
toloopW:dex ; 2
bne toloopW ; 2nt/3
dey ; 2
bne toloopV ; 2nt/3
jmp to_done_state ; 3
;============================
; state2: Do nothing
;============================
; 3586 + 3 = 3589
to_state2:
; delay
; Try X=142 Y=5 cycles=3581 R5
nop
lda $0
ldy #5 ; 2
toloopZ:ldx #142 ; 2
toloopY:dex ; 2
bne toloopY ; 2nt/3
dey ; 2
bne toloopZ ; 2nt/3
jmp to_done_state ; 3