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midline: still don't know why it won't work

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This commit is contained in:
Vince Weaver 2023-05-18 09:37:33 -04:00
parent b44a925fcf
commit 3ec17c1bde
1 changed files with 24 additions and 14 deletions
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38
vaporlock/demo/midline.s
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@ -72,6 +72,25 @@ lp17029:
;==============================
blog:
vblank_start:
;======================================
; wait 4550 for VBLANK
;======================================
; 2
ldx #4 ; 2
jsr wait_x_x_1k ; 4000
ldy #54 ; 2
jsr wait_y_x_10 ; 540
; 4543
inc FRAME ; 5
; 4548 (-2)
; nop ; 2
; 0
; 192 + 70 (vblank) = 262
; if 42 high, then day 220 on, 42 off
; how start in middle?
@ -80,7 +99,7 @@ blog:
lda $EA ; nop3 ; 3
top_smc:
ldx #90 ; 2
ldx #4 ; 2
bne top8 ; bra ; 3/2
@ -176,20 +195,11 @@ bottom_8:
; 58
inx ; 2
cpx #192 ; 2
bne bottom_loop ; 3/2
bcc bottom_loop ; 3/2
; -1
ldx #4 ; 2
jsr wait_x_x_1k ; 4000
ldy #54 ; 2
jsr wait_y_x_10 ; 540
; 4543
inc FRAME ; 5
; 4548 (-2)
nop ; 2
; 0
jmp top_smc
; 3
; -1
jmp vblank_start
; 2
delay_16_setgr:
bit SET_GR