From 7e217c75a0ae496438392334581daeff373dfaa4 Mon Sep 17 00:00:00 2001
From: Vince Weaver <vince@deater.net>
Date: Sat, 9 Jan 2021 15:48:29 -0500
Subject: [PATCH] plasma: trying to get to fit

---
 basic/appleiibot/Makefile   |  8 +++++++-
 basic/appleiibot/plasma.bas |  2 ++
 graphics/gr/plasma/plasma.s | 34 +++++++++++-----------------------
 3 files changed, 20 insertions(+), 24 deletions(-)
 create mode 100644 basic/appleiibot/plasma.bas

diff --git a/basic/appleiibot/Makefile b/basic/appleiibot/Makefile
index d3dc8811..8c27152b 100644
--- a/basic/appleiibot/Makefile
+++ b/basic/appleiibot/Makefile
@@ -11,7 +11,7 @@ appleiibot.dsk:	E2.BAS FLAME.BAS FLAME2.BAS \
 	RASTER4.BAS RASTER5.BAS PUMPKIN.BAS PUMPKIN_SMALL.BAS LADY.BAS \
 	A2.BAS FOURAM.BAS FLOPPY.BAS QR.BAS A2_4EVER.BAS RLE.BAS RLE2.BAS \
 	RLEASM.BAS HORIZON.BAS FLYER.BAS STAR.BAS HYPER.BAS FASTAR.BAS \
-	FASTAR2.BAS BIN.BAS FALLING.BAS SNOW.BAS XMAS.BAS AN3.BAS
+	FASTAR2.BAS BIN.BAS FALLING.BAS SNOW.BAS XMAS.BAS AN3.BAS PLASMA.BAS
 	cp empty.dsk appleiibot.dsk
 	$(DOS33) -y appleiibot.dsk BSAVE -a 0x0300 LOAD
 #	$(DOS33) -y appleiibot.dsk BSAVE -a 0x0C00 FASTAR2
@@ -54,6 +54,7 @@ appleiibot.dsk:	E2.BAS FLAME.BAS FLAME2.BAS \
 	$(DOS33) -y appleiibot.dsk SAVE A SNOW.BAS
 	$(DOS33) -y appleiibot.dsk SAVE A XMAS.BAS
 	$(DOS33) -y appleiibot.dsk SAVE A AN3.BAS
+	$(DOS33) -y appleiibot.dsk SAVE A PLASMA.BAS
 
 ###
 
@@ -146,6 +147,11 @@ XMAS.BAS:	xmas.bas
 AN3.BAS:	an3.bas
 	$(TOKENIZE) < an3.bas > AN3.BAS
 
+####
+
+PLASMA.BAS:	plasma.bas
+	$(TOKENIZE) < plasma.bas > PLASMA.BAS
+
 
 ####
 
diff --git a/basic/appleiibot/plasma.bas b/basic/appleiibot/plasma.bas
new file mode 100644
index 00000000..d0fdab8b
--- /dev/null
+++ b/basic/appleiibot/plasma.bas
@@ -0,0 +1,2 @@
+1REM,=n9D`M1X/5Z.NO.MO-AS'1k-1b3kR4jjk/3bbnXA3k0j_E`>0S91X1P2(02ImRB28=mY8J0N9:W3T/JhO;X/OoI73)mZ[/3/1BQ]M2Q<63nWoR,gb1`<QC8:JoLE0#.1+01,/omnngmoP(L3748DA$ 2@-$ 1CKJA"3'--&)KTA1MF$(*@,F^'W<3'=
+2FORI=0TO141:POKE3072+I,4*PEEK(2054+I)-192+(PEEK(2195+I/3)-32)/4^(I-INT(I/3)*3):NEXT:CALL3072
diff --git a/graphics/gr/plasma/plasma.s b/graphics/gr/plasma/plasma.s
index 9c170914..dbad947f 100644
--- a/graphics/gr/plasma/plasma.s
+++ b/graphics/gr/plasma/plasma.s
@@ -14,6 +14,9 @@
 
 ; 149 -- add page flipping
 ; 144 -- optimize a bit
+; 141 -- smc DRAW_PAGE
+
+; goal=135
 
 .include "zp.inc"
 .include "hardware.inc"
@@ -30,15 +33,11 @@ SAVEY = $FF
 	jsr	SETGR
 	bit	FULLGR
 
-;	lda	#4
-;	sta	DRAW_PAGE
-
 ;col = ( 8.0 + (sintable[xx&0xf])
 ;           + 8.0 + (sintable[yy&0xf])
 ;            ) / 2;
 
 create_lookup:
-
 	ldy	#15
 create_yloop:
 	ldx	#15
@@ -84,17 +83,15 @@ plot_frame:
 	; flip page
 
 ;	ldx	#0		; x already 0
-	lda	DRAW_PAGE
+
+	lda	draw_page_smc+1	; DRAW_PAGE
 	beq	done_page
 	inx
 done_page:
 	ldy	PAGE0,X
 
 	eor	#$4
-	sta	DRAW_PAGE
-
-
-
+	sta	draw_page_smc+1 ; DRAW_PAGE
 
 	; plot frame
 
@@ -117,15 +114,15 @@ plot_yloop:
 				; after, A is GBASL, C is clear
 
 	lda	GBASH
-	adc	DRAW_PAGE
+draw_page_smc:
+	adc	#0
 	sta	GBASH
 
 	plp
 
 	lda	#$0f		; setup mask
 	bcc	plot_mask
-	adc	#$e0
-
+	adc	#$e0		; needlessly clever, from monitor rom src
 plot_mask:
 	sta	MASK
 
@@ -153,6 +150,7 @@ plot_lookup_smc:
 
 	and	#$f
 	lsr
+
 	tax
 	lda	colorlookup,X
 	sta	COLOR
@@ -168,16 +166,6 @@ plot_lookup_smc:
 	bpl	plot_yloop
 	bmi	forever_loop
 
-;	iny
-;	cpy	#40
-;	bne	plot_xlooph
-
-;	inx
-;	cpx	#40
-;	bne	plot_yloop
-;	beq	forever_loop
-
-
 colorlookup:
 bw_color_lookup:
 .byte $55,$22,$66,$77,$ff,$77,$55	; ,$00 shared w sin table
@@ -192,7 +180,7 @@ sinetable:
 ;.byte $00,$55,$77,$ff,$77,$66,$22,$55
 
 
+; make lookup happen at page boundary
 
 .org	$d00
-;.align	$100
 lookup: