diff --git a/basic/appleiibot/Makefile b/basic/appleiibot/Makefile
index fb44ce46..4f3788e3 100644
--- a/basic/appleiibot/Makefile
+++ b/basic/appleiibot/Makefile
@@ -17,7 +17,7 @@ appleiibot.dsk:	E2.BAS FLAME.BAS FLAME2.BAS HELLO \
 	COMBO.BAS WIRES.BAS PATTERN.BAS BALL.BAS LINES.BAS MOD9.BAS \
 	XOR_ZOOM.BAS MOD9_HGR.BAS SIER_HGR.BAS MOVE.BAS SINE.BAS XDRAW128.BAS \
 	GATOR.BAS CURSOR.BAS STARGATE.BAS TUNNEL.BAS STARFIELD.BAS \
-	STAROOPS.BAS
+	STAROOPS.BAS HGRSTARFIELD.BAS
 
 #	cp $(EMPTY_DISK)/empty.dsk  appleiibot.dsk
 	cp empty.dsk appleiibot.dsk
@@ -88,6 +88,7 @@ appleiibot.dsk:	E2.BAS FLAME.BAS FLAME2.BAS HELLO \
 	$(DOS33) -y appleiibot.dsk SAVE A TUNNEL.BAS
 	$(DOS33) -y appleiibot.dsk SAVE A STARFIELD.BAS
 	$(DOS33) -y appleiibot.dsk SAVE A STAROOPS.BAS
+	$(DOS33) -y appleiibot.dsk SAVE A HGRSTARFIELD.BAS
 
 ####
 
@@ -489,6 +490,10 @@ BALL.BAS:	ball.bas
 LINES.BAS:	lines.bas
 	$(TOKENIZE) < lines.bas > LINES.BAS
 
+####
+
+HGRSTARFIELD.BAS:	hgrstarfield.bas
+	$(TOKENIZE) < hgrstarfield.bas > HGRSTARFIELD.BAS
 
 
 ####
diff --git a/basic/appleiibot/hgrstarfield.bas b/basic/appleiibot/hgrstarfield.bas
new file mode 100644
index 00000000..6da480bb
--- /dev/null
+++ b/basic/appleiibot/hgrstarfield.bas
@@ -0,0 +1,2 @@
+1FORI=0TO139:POKE876+I,4*PEEK(2125+I)-192+(PEEK(2265+I/3)-35)/4^(I-INT(I/3)*3):NEXT
+2&",clU68V.b*lX6XD,fnV/QgQn]LBUBZJX05EmUm]X7g/JHKnUK]T+d0JSZMBe(j4YgQfTZWoX$5EkYn7]0+^0V1^:\Yn^0kUTZ/lQ[^,k:210M.ioH2/0Bk5J$Uo^=m(2nV:4#?o6HCH0S1PK&S4+$D#/53*<'W$CCEC,S+SWU+*'445:D&76T3C#Y#/
diff --git a/basic/appleiibot/staroops.bas b/basic/appleiibot/staroops.bas
index 1fb38613..131b2ff1 100644
--- a/basic/appleiibot/staroops.bas
+++ b/basic/appleiibot/staroops.bas
@@ -1,2 +1,2 @@
 1FORI=0TO131:POKE884+I,4*PEEK(2125+I)-192+(PEEK(2257+I/3)-35)/4^(I-INT(I/3)*3):NEXT
-2&",clU68V.b*lX.V7,fnV/Qh]\+d0FGb`\:b0T0OoQK]P7g/JPZUDe0l2aiQnVQWoX08=kYnC`,7a.b4X:^Rn^,kUS^0kU\\0l3N2/U0foH.31?o6I0Xob>m04nV:./Bo6H7J0S1PKFS4'W4#$G43*#%-%I#F#6.F?3'(,@(130(&$%;&S
+2&",clU68V.b*lX.V7,fnV/Qh]\+d0FGb`\:b0T0OoQK]P7g/JSZUDe0l2aiQnVQWoX08=kYnC`,7a.b4X:^Rn^,kUS^0kU\\0l3N2/U0foH.31?o6I0Xob>m04nV:./Bo6H7J0S1PKFS4'W4#$G43*#%-%I#F#6.F?3'(,@(130(&$%;&S
diff --git a/graphics/hgr/starfield/Makefile b/graphics/hgr/starfield/Makefile
index b2c9f430..73f6fa1a 100644
--- a/graphics/hgr/starfield/Makefile
+++ b/graphics/hgr/starfield/Makefile
@@ -12,7 +12,7 @@ starfield.dsk:	HELLO STARS FASTAR STARBOT STARTINY STAROOPS
 	$(DOS33) -y starfield.dsk SAVE A HELLO
 	$(DOS33) -y starfield.dsk BSAVE -a 0x0300 STARS
 	$(DOS33) -y starfield.dsk BSAVE -a 0x0C00 FASTAR
-	$(DOS33) -y starfield.dsk BSAVE -a 0x0C00 STARBOT
+	$(DOS33) -y starfield.dsk BSAVE -a 0x036C STARBOT
 	$(DOS33) -y starfield.dsk BSAVE -a 0x0C00 STARTINY
 	$(DOS33) -y starfield.dsk BSAVE -a 0x0374 STAROOPS
 
@@ -41,7 +41,7 @@ stars.o:	stars.s
 ###
 
 STARBOT:	starbot.o
-	ld65 -o STARBOT starbot.o -C $(LINKER_SCRIPTS)/apple2_c00.inc
+	ld65 -o STARBOT starbot.o -C $(LINKER_SCRIPTS)/apple2_36c.inc
 
 starbot.o:	starbot.s
 	ca65 -o starbot.o starbot.s -l starbot.lst
diff --git a/graphics/hgr/starfield/starbot.s b/graphics/hgr/starfield/starbot.s
index 7935553b..3d9a7c22 100644
--- a/graphics/hgr/starfield/starbot.s
+++ b/graphics/hgr/starfield/starbot.s
@@ -7,6 +7,8 @@
 ; 155 bytes -- scale to more of full screen
 ; 153 bytes -- blue/orange instead of purple/green
 ; 149 bytes -- optimize 2nd plot arg shuffling
+; 148 bytes -- optimize 1st plot arg shuffling
+; 140 bytes -- turn off all range checking except Z
 
 NUMSTARS	= 27		; 27 good, 28+ not work ($1C)
 
@@ -85,7 +87,7 @@ big_loop:
 ;	lda	#100
 ;	jsr	WAIT
 
-	ldy	#30
+	ldy	#80
 	jsr	BELL2	; BEEP delays too
 
 	; A now 0
@@ -104,12 +106,11 @@ star_loop:
 
 	stx	SAVEX
 
-	ldy	oldx,X		; get X valu into Y
-;	tya
-;	tax
-	sty	TEMP
 	lda	oldy,X
-	ldx	TEMP
+	pha
+	lda	oldx,X		; get X valu into Y
+	tax
+	pla
 
 	ldy	#0
 
@@ -139,10 +140,10 @@ star_loop:
 
 	; if off-screen then need new star
 
-	cmp	#192
-	bcs	new_star	; bge >39
-	cmp	#0
-	bcc	new_star	; if <0
+;	cmp	#192
+;	bcs	new_star	; bge >39
+;	cmp	#0
+;	bcc	new_star	; if <0
 
 
 	sta	YY		; YY
@@ -158,7 +159,7 @@ star_loop:
 	lda	star_x,X	; get X of start
 
 	jsr	do_divide
-	adc	#128
+	adc	#140		; center
 
 	tay			; put XX in Y
 	sty	oldx,X		; save for next time to erase
@@ -239,7 +240,7 @@ color_lookup:
 	sta	star_y,X	; random YY
 
 	lda	$F002,Y
-	and	#$7f		; random ZZ 0..127 (can't go negative or stars move backward)
+	and	#$1f		; random ZZ 0..127 (can't go negative or stars move backward)
 	ora	#$1		; avoid 0
 	sta	star_z,X
 
@@ -294,5 +295,5 @@ early_out:
 	; for BASIC bot load
 
 	; need this to be at $3F5
-	; it's at 8C, so 6D
+	; it's at 89, so 6C
 	jmp	small_starfield
diff --git a/graphics/hgr/starfield/staroops.s b/graphics/hgr/starfield/staroops.s
index 5d3a6a4e..ea93fce2 100644
--- a/graphics/hgr/starfield/staroops.s
+++ b/graphics/hgr/starfield/staroops.s
@@ -158,7 +158,7 @@ star_loop:
 	lda	star_x,X	; get X of start
 
 	jsr	do_divide
-	adc	#128
+	adc	#140		; center
 
 	tay			; put XX in Y
 	sty	oldx,X		; save for next time to erase