diff --git a/Source/HBIOS/ay38910.asm b/Source/HBIOS/ay38910.asm
index e3070813..c4bb8d48 100644
--- a/Source/HBIOS/ay38910.asm
+++ b/Source/HBIOS/ay38910.asm
@@ -64,7 +64,7 @@ AY_IDAT	.EQU	0			; NO INSTANCE DATA ASSOCIATED WITH THIS DEVICE
 ;
 ;	DEVICE CAPABILITIES AND CONFIGURATION
 ;
-SBCV2004	.EQU	0			; USE SBC-V2-004 HALF CLOCK DIVIDER
+SBCV2004	.EQU	0		; USE SBC-V2-004 HALF CLOCK DIVIDER
 ;
 AY_TONECNT	.EQU	3		; COUNT NUMBER OF TONE CHANNELS
 AY_NOISECNT	.EQU	1		; COUNT NUMBER OF NOISE CHANNELS
@@ -96,17 +96,17 @@ AY38910_INIT:
 	LD	A,$FF			; ACTIVATE DEVICEBIT 4 IS AY RESET CONTROL, BIT 3 IS ACTIVE LED
 	OUT	(AY_ACR),A		; SET INIT AUX CONTROL REG
 #ENDIF
-
+;
 	LD	D,AY_R2CHBP		; SIMPLE HARDWARE PROBE
-	LD	E,$AA
+	LD	E,$55
 	CALL	AY_WRTPSG		; WRITE AND 
-	CALL	AY_RDPSG
-	LD	A,$AA
-	CP	E
+	CALL	AY_RDPSG		; READ TO A
+	LD	A,$55			; SOUND CHANNEL
+	CP	E			; REGISTER
 	JR	Z,AY_FND
-
+;
 	CALL	PRTSTRD \ .TEXT " NOT PRESENT$"
-
+;
 	LD	A,$FF			; UNSUCCESSFULL INIT		
 	RET
 ;
@@ -120,9 +120,9 @@ AY_FND:	LD	IY, AY_IDAT		; SETUP FUNCTION TABLE
 	LD	E,$07			; SET VOLUME TO 50%
 	CALL	AY_SETV			; ON ALL CHANNELS
 ;
-	LD	D,AY_R2CHBP		; BEEP ON CHANNEL B (CENTER)
-	LD	E,$55
-	CALL	AY_WRTPSG		; R02 = $55 = 01010101
+;	LD	D,AY_R2CHBP		; BEEP ON CHANNEL B (CENTER)
+;	LD	E,$55
+;	CALL	AY_WRTPSG		; R02 = $55 = 01010101
 	LD	D,AY_R3CHBP
 	LD	E,$00
 	CALL	AY_WRTPSG		; R03 = $00 = XXXX0000