diff --git a/graphics/hgr/bubble/bubble.s b/graphics/hgr/bubble/bubble.s
index efeb3cf2..89e2c622 100644
--- a/graphics/hgr/bubble/bubble.s
+++ b/graphics/hgr/bubble/bubble.s
@@ -249,7 +249,51 @@ rl_smc:
 	sta	STEMP1L							; 3
 	lda	RXH							; 3
 
-.include "sin_unrolled.s"
+	;=======================
+
+	; / 6.28	is roughly the same as *0.16
+	;               = .5 .25 .125 .0625 .03125
+	; 1/6.28 = 0.16 =  0 0    1   0       1 0 0 0 = 0x28
+
+	; i=(i*0x28)>>8;
+
+	; A has STEMP1H
+
+	; i2=i<<3;
+
+
+	asl	STEMP1L							; 5
+	rol								; 2
+	asl	STEMP1L							; 5
+	rol								; 2
+	asl	STEMP1L							; 5
+	rol								; 2
+
+	; i1=i<<5;
+
+	ldx	STEMP1L							; 3
+	stx	STEMP2L							; 3
+
+	sta	STEMP1H							; 3
+
+	asl	STEMP2L							; 5
+	rol								; 2
+	asl	STEMP2L							; 5
+	rol								; 2
+
+	; i=(i1+i2)>>8;
+
+	; We ignore the low byte as we don't need it
+	; possibly inaccurate as we don't clear carry?
+
+	adc	STEMP1H							; 2
+	tax								; 2
+
+	; sl=fsinh[i];
+
+	; tradeoff size for speed by having lookup
+	;	table for sign bits
+	;	the sign lookup only saves like 2 cycles
 
 	;=====================
 	; U+=sin(RX)