--- a/src/math.inc	Fri Feb 21 10:51:36 2020 +0100
+++ b/src/math.inc	Fri Feb 28 15:45:07 2020 +0100
@@ -1,6 +1,6 @@
 ;=============================================================================
 ;
-;   File math.inc                             combined next generation V3.04.3
+;   File math.inc                             combined next generation V3.08.8
 ;
 ;
 ;   Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved.
@@ -8,45 +8,45 @@
 ; HISTORY
 ;  2011-08-03 : [mH] moving from OSTC code
 
-	extern	convert_time			; convert hi:lo in minutes to hours (up:hi) and minutes (lo)
+	extern	convert_time			; convert minutes in hi:lo to hours (up:hi) and minutes (lo)
 									; also usable for conversion of seconds to minutes and seconds
 									; trashes xA, xB, xC
 
-	extern	div16					; divA:2 = divA:2 / 2^WREG
+	extern	div16					; divA:2 = divA:2 / 2^WREG					SHIFT-RIGHT    with UNSIGNED values
 									; trashes WREG
 
-	extern	mult16					; divA:2 = divA:2 * 2^WREG
+	extern	mult16					; divA:2 = divA:2 * 2^WREG					SHIFT-LEFT     with UNSIGNED values
 									; trashes WREG
 
-	extern	addU16					; sub_c:2 = sub_a:2 + sub_b:2	with USIGNED values
+	extern	addU16					; sub_c:2 = sub_a:2 + sub_b:2				ADDITION       with UNSIGNED values
 									; trashes WREG
 
-	extern	sub16					; sub_c:2 = sub_a:2 - sub_b:2	with SIGNED   values
+	extern	sub16					; sub_c:2 = sub_a:2 - sub_b:2				SUBTRACTION    with SIGNED   values
 									; sets neg_flag if result is < 0
 									; trashes WREG
 
-	extern	subU16					; sub_c:2 = sub_a:2 - sub_b:2	with UNSIGNED values
+	extern	subU16					; sub_c:2 = sub_a:2 - sub_b:2				SUBTRACTION    with UNSIGNED values
 									; sets neg_flag if result is < 0
 									; trashes WREG
 
-	extern	cmpU16					; trashed = sub_a:2 - sub_b:2	with UNSIGNED values
+	extern	cmpU16					; trashed = sub_a:2 - sub_b:2				COMPARE        with UNSIGNED values
 									; sets neg_flag if result is < 0, but does not store result itself
 									; trashes WREG
 
-	extern	mult16x16				; xC:4 = xA:2 * xB:2			with UNSIGNED values
+	extern	mult16x16				; xC:4 = xA:2 * xB:2						MULTIPLICATION with UNSIGNED values
 									; trashes PRODL, PRODH, WREG
 
-	extern	div16x16				; xC:2 = xA:2 / xB:2 with xA as remainder
+	extern	div16x16				; xC:2 = xA:2 / xB:2 with xA as remainder	DIVISION       with UNSIGNED values
 									; trashes xB, WREG
 
-	extern	div32x16				; xC:4 = xC:4 / xB:2 with xA as remainder
+	extern	div32x16				; xC:4 = xC:4 / xB:2 with xA as remainder	DIVISION       with UNSIGNED values
 									; trashes WREG
 
-	extern	isr_shift_C31			; 24 bit shift, repeated WREG times,
-									; dedicated to a specific usage
+	extern	isr_shift_C31			; 24 bit shift, repeated WREG times, dedicated to a specific usage
 
-	extern	isr_unsigned_mult16x16	; isr_xC = isr_xA * _isr_xB		with UNSIGNED values
+
+	extern	isr_unsigned_mult16x16	; isr_xC = isr_xA * isr_xB		MULTIPLICATION with UNSIGNED values ** for ISR only **
 									; trashes PRODL, PRODH, WREG
 
-	extern	isr_signed_mult16x16	; isr_xC = isr_xA * _isr_xB		with SIGNED values
+	extern	isr_signed_mult16x16	; isr_xC = isr_xA * isr_xB		MULTIPLICATION with SIGNED   values ** for ISR only **
 									; trashes PRODL, PRODH, WREG