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fireworks: initial hires/lores split

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This commit is contained in:
Vince Weaver 2018-09-05 21:31:26 -04:00
parent c869306e87
commit b1d8098bee
1 changed files with 72 additions and 7 deletions
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79
fireworks/fireworks.s
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@ -31,6 +31,8 @@ FULLGR = $C052 ; Full screen, no text
PAGE0 = $C054 ; Page0
PAGE1 = $C055 ; Page1
LORES = $C056 ; Enable LORES graphics
HIRES = $C057 ; Enable HIRES graphics
PADDLE_BUTTON0 = $C061
PADDL0 = $C064
PTRIG = $C070
@ -242,15 +244,70 @@ loopB:
display_loop:
ldy #96 ; 2
; 152 * 65 = 9880 - 12 = 9868
outer_loop:
bit HIRES ; 4
bit PAGE0 ; 4
; Try X=81 Y=24 cycles=9865 R3
lda DRAW_PAGE ; 3
ldy #24 ; 2
sloop1:
ldx #81 ; 2
sloop2:
dex ; 2
bne sloop2 ; 2nt/3
dey ; 2
bne sloop1 ; 2nt/3
bit LORES ; 4
;top_loop:
;
;
; ldy #76 ; 2
;
;outer_loop:
;
; bit PAGE0 ; 4
; ldx #12 ; 65 cycles with PAGE0 ; 2
;page0_loop: ; delay 61+bit
; dex ; 2
; bne page0_loop ; 2/3
; bit(4) -1(fallthrough) + loop*5 -1(fallthrouh)+4 extra = 61
; 5L = 55
;
; bit PAGE1 ; 4
; ldx #11 ; 65 cycles with PAGE1 ; 2
; ;
;page1_loop: ; delay 115+(7 loop)+4 (bit)+4(extra)
; dex ; 2
; bne page1_loop ; 2/3
;
; dey ; 2
; bne outer_loop ; 2/3
;
;
;
;bottom_loop:
ldy #20 ; 2
bouter_loop:
bit PAGE0 ; 4
ldx #12 ; 65 cycles with PAGE0 ; 2
page0_loop: ; delay 61+bit
bpage0_loop: ; delay 61+bit
dex ; 2
bne page0_loop ; 2/3
bne bpage0_loop ; 2/3
; bit(4) -1(fallthrough) + loop*5 -1(fallthrouh)+4 extra = 61
@ -259,12 +316,12 @@ page0_loop: ; delay 61+bit
bit PAGE1 ; 4
ldx #11 ; 65 cycles with PAGE1 ; 2
;
page1_loop: ; delay 115+(7 loop)+4 (bit)+4(extra)
bpage1_loop: ; delay 115+(7 loop)+4 (bit)+4(extra)
dex ; 2
bne page1_loop ; 2/3
bne bpage1_loop ; 2/3
dey ; 2
bne outer_loop ; 2/3
bne bouter_loop ; 2/3
@ -272,6 +329,14 @@ page1_loop: ; delay 115+(7 loop)+4 (bit)+4(extra)
; We have 4550 cycles in the vblank, use them wisely
;======================================================
; do_nothing should be 4550+1 -2-9 -7= 4533
; 4550
; +1 fallthrough
; -2 ldy at entry
; -7 keyboard
; -6 jsr
; -3 jmp
; ========
; 4533
jsr do_nothing ; 6