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waterfal: vapor-lock again. ghost chocobo

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This commit is contained in:
Vince Weaver 2018-08-02 15:59:24 -04:00
parent bb96ec6fb8
commit c0428150d4
1 changed files with 26 additions and 23 deletions
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49
waterfall/waterfall.s
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@ -60,6 +60,7 @@ waterfall_demo:
lda #4 lda #4
sta DRAW_PAGE sta DRAW_PAGE
sta XPOS
;============================= ;=============================
; Load foreground to graphic page1 (apple page2) ; Load foreground to graphic page1 (apple page2)
@ -228,8 +229,9 @@ page1_loop: ; delay 115+(7 loop)+4 (bit)+4(extra)
; -6 jsr to do_nothing ; -6 jsr to do_nothing
; -10 check for keypress ; -10 check for keypress
; -2252 copy screen ; -2252 copy screen
; -2214 draw sprite
; ============= ; =============
; 2276 ; 67
jsr do_nothing ; 6 jsr do_nothing ; 6
@ -242,9 +244,15 @@ page1_loop: ; delay 115+(7 loop)+4 (bit)+4(extra)
; 2252 ; 2252
;==========================
; draw sprite
;==========================
; 13 + 11 + 2190 = 2214
; beq bird_walking ; beq bird_walking
; 2 ; ; 2
lda #>bird_rider_stand_right ; 2 lda #>bird_rider_stand_right ; 2
sta INH ; 3 sta INH ; 3
lda #<bird_rider_stand_right ; 2 lda #<bird_rider_stand_right ; 2
@ -254,32 +262,27 @@ page1_loop: ; delay 115+(7 loop)+4 (bit)+4(extra)
;bird_walking: ;bird_walking:
; 3 ; 3
lda #>bird_rider_walk_right ; 2 ; lda #>bird_rider_walk_right ; 2
sta INH ; 3 ; sta INH ; 3
lda #<bird_rider_walk_right ; 2 ; lda #<bird_rider_walk_right ; 2
sta INL ; 3 ; sta INL ; 3
; must be 15 ; ; must be 15
lda #0 ; 2 ; lda #0 ; 2
; Must add another 15 as sprite is different ; ; Must add another 15 as sprite is different
inc YPOS ; 5 ; inc YPOS ; 5
inc YPOS ; 5 ; inc YPOS ; 5
inc YPOS ; 5 ; inc YPOS ; 5
draw_bird: draw_bird:
; 15 + 7
lda #17 ; 2
sta XPOS ; 3
lda #22 ; 2 lda #22 ; 2
sta YPOS ; 3 sta YPOS ; 3
jsr put_sprite ; 6 jsr put_sprite ; 6
;========= ;=========
; 38 ; 11 + 2190
; + 2190
;========
; 2228
;==================== ;====================
@ -301,17 +304,17 @@ all_done:
;================================= ;=================================
; do nothing ; do nothing
;================================= ;=================================
; and take 2276-6 = 2260 cycles to do it ; and take 67-6 = 61 cycles to do it
do_nothing: do_nothing:
; Try X=29 Y=15 cycles=2266 R4 ; Try X=10 Y=1 cycles=57 R4
nop ; 2 nop ; 2
nop ; 2 nop ; 2
ldy #15 ; 2 ldy #1 ; 2
loop1: loop1:
ldx #29 ; 2 ldx #10 ; 2
loop2: loop2:
dex ; 2 dex ; 2
bne loop2 ; 2nt/3 bne loop2 ; 2nt/3