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megademo: merge in vblank

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This commit is contained in:
Vince Weaver 2018-10-15 00:51:33 -04:00
parent facd100eb6
commit 5ba192c037
1 changed files with 14 additions and 23 deletions
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37
megademo/leaving.s
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@ -162,37 +162,28 @@ lvloop7:dex ; 2
; 21
; 3640
; - 1255
; - 1418
; - 21
;==========
; 946
; Try X=3 Y=45 cycles=946
ldy #45 ; 2
lvloopQ:ldx #3 ; 2
lvloopR:dex ; 2
bne lvloopR ; 2nt/3
dey ; 2
bne lvloopQ ; 2nt/3
;======================================================
; We have 4550 cycles in the vblank, use them wisely
;======================================================
; do_nothing should be 4550
; do_nothing should be 3640 (bottom of GR screen)
; 4550 (vblank)
; -1255 (clear yard)
; -1418 (draw tfv)
; -21 (draw susie)
; -10 keypress
; ===========
; 4540
; 5486
; Try X=9 Y=89 cycles=4540
; Try X=51 Y=21 cycles=5482 R4
ldy #89 ; 2
lvloop1:ldx #9 ; 2
nop
nop
ldy #21 ; 2
lvloop1:ldx #51 ; 2
lvloop2:dex ; 2
bne lvloop2 ; 2nt/3
dey ; 2