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fireworks: trying to straighten out the main screen cycle counting
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@ -1,17 +1,14 @@
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sound effects, allow disabling
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xor the locations of reads?
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just restart?
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sound effects:
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one more at start explosion?
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text scrolling (split?)
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cycle invariant HPLOT TO
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re-arrange to minimize padding
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remove dead code
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adjust speed
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adjust colors of gradient
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adjust colors of gradient?
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@ -178,6 +178,10 @@ loopB:
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display_loop:
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;===================================
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; HIRES PAGE0 for the top 152 lines
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;===================================
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; 152 * 65 = 9880 - 12 = 9868
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bit HIRES ; 4
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@ -188,46 +192,51 @@ display_loop:
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lda DRAW_PAGE ; 3
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ldy #24 ; 2
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sloop1:
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ldx #81 ; 2
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sloop2:
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dex ; 2
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bne sloop2 ; 2nt/3
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hgloop1:ldx #81 ; 2
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hgloop2:dex ; 2
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bne hgloop2 ; 2nt/3
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dey ; 2
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bne sloop1 ; 2nt/3
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bne hgloop1 ; 2nt/3
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;====================================================
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; LORES PAGE0/PAGE1 alternating for the next 24 lines
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;====================================================
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bit LORES ; 4
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ldy #20 ; *2=40 lines ; 2
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;============
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; 6
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; bit(4) -1(fallthrough) + loop*5 -1(fallthrouh)+4 extra = 61
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; 5L = 55
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ldy #20 ; 2
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; we set PAGE0 (4) then want to NOP (61) for a total of 65
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bouter_loop:
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bit PAGE0 ; 4
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ldx #12 ; 65 cycles with PAGE0 ; 2
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bpage0_loop: ; delay 61+bit
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dex ; 2
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bne bpage0_loop ; 2/3
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;=============
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; 6+(12*5)-1=65
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; bit(4) -1(fallthrough) + loop*5 -1(fallthrouh)+4 extra = 61
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; 5L = 55
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; we set PAGE1 (4) as well as dey (2) and bne (3) then nop (55)
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;
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bit PAGE1 ; 4
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ldx #11 ; 65 cycles with PAGE1 ; 2
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;
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bpage1_loop: ; delay 115+(7 loop)+4 (bit)+4(extra)
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bpage1_loop:
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dex ; 2
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bne bpage1_loop ; 2/3
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;=============
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; 6+(11*5)-1=60
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dey ; 2
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bne bouter_loop ; 2/3
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;==============
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; 5 to make 65
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;======================================================
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