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waterfall: no longer a ghost

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This commit is contained in:
Vince Weaver 2018-08-03 11:21:17 -04:00
parent c8014274af
commit e5634ca341
1 changed files with 83 additions and 27 deletions
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110
waterfall/waterfall.s
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@ -507,26 +507,53 @@ even_first_line:
lda YPOS ; 3 lda YPOS ; 3
nop ; 2 nop ; 2
outer_loop_even: outer_loop_even:
bit PAGE0 ; 4
; delay 29
asl DUMMY ; 6
asl DUMMY ; 6
asl DUMMY ; 6
asl DUMMY ; 6
lda YPOS ; 3
nop ; 2
bit PAGE1 ; 4 bit PAGE1 ; 4
ldx #12 ; 65 cycles with PAGE0 ; 2
page1_loop_even: ; delay 61+bit
dex ; 2
bne page1_loop_even ; 2/3
lda YPOS ; 3
; bit(4) -1(fallthrough) + loop*5 -1(fallthrouh)+4 extra = 61
; 5L = 55
bit PAGE0 ; 4 bit PAGE0 ; 4
ldx #11 ; 65 cycles with PAGE1 ; 2
; ; delay 21
page0_loop_even: ; delay 115+(7 loop)+4 (bit)+4(extra) asl DUMMY ; 6
dex ; 2 asl DUMMY ; 6
bne page0_loop_even ; 2/3 asl DUMMY ; 6
lda YPOS ; 3
; line 2
bit PAGE0 ; 4
; delay 29
asl DUMMY ; 6
asl DUMMY ; 6
asl DUMMY ; 6
asl DUMMY ; 6
lda YPOS ; 3
nop ; 2
bit PAGE0 ; 4
lda YPOS ; 3
bit PAGE0 ; 4
; delay 21
asl DUMMY ; 6
asl DUMMY ; 6
nop ; 2
nop ; 2
dey ; 2 dey ; 2
bne outer_loop_even ; 2/3 bne outer_loop_even ; 2/3
@ -549,7 +576,7 @@ page0_loop_even: ; delay 115+(7 loop)+4 (bit)+4(extra)
display_odd: display_odd:
odd_first_line: odd_first_two_lines:
ldy #95 ; 2 ldy #95 ; 2
asl DUMMY ; 6 asl DUMMY ; 6
@ -577,22 +604,51 @@ odd_first_line:
outer_loop_odd: outer_loop_odd:
bit PAGE0 ; 4
; delay 29
asl DUMMY ; 6
asl DUMMY ; 6
asl DUMMY ; 6
asl DUMMY ; 6
lda YPOS ; 3
nop ; 2
bit PAGE1 ; 4 bit PAGE1 ; 4
ldx #12 ; 65 cycles with PAGE0 ; 2
page1_loop_odd: ; delay 61+bit
dex ; 2
bne page1_loop_odd ; 2/3
lda YPOS ; 3
; bit(4) -1(fallthrough) + loop*5 -1(fallthrouh)+4 extra = 61
; 5L = 55
bit PAGE0 ; 4 bit PAGE0 ; 4
ldx #11 ; 65 cycles with PAGE1 ; 2
; ; delay 21
page0_loop_odd: ; delay 115+(7 loop)+4 (bit)+4(extra) asl DUMMY ; 6
dex ; 2 asl DUMMY ; 6
bne page0_loop_odd ; 2/3 asl DUMMY ; 6
lda YPOS ; 3
; line 2
bit PAGE0 ; 4
; delay 29
asl DUMMY ; 6
asl DUMMY ; 6
asl DUMMY ; 6
asl DUMMY ; 6
lda YPOS ; 3
nop ; 2
bit PAGE0 ; 4
lda YPOS ; 3
bit PAGE0 ; 4
; delay 21
asl DUMMY ; 6
asl DUMMY ; 6
nop ; 2
nop ; 2
dey ; 2 dey ; 2
bne outer_loop_odd ; 2/3 bne outer_loop_odd ; 2/3