diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index c86c361f..2e017e0f 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -1628,7 +1628,6 @@ HB_INIT_REC:
   #IF (PLATFORM == PLT_SBC)
 	.DW	UART_INIT
 	.DW	MD_INIT
-	.DW	FD_INIT
   #ENDIF
 HB_INITRLEN	.EQU	(($ - HB_INIT_REC) / 2)
 ;
@@ -1646,6 +1645,9 @@ HB_PCINITTBL:
 #IF (UARTENABLE)
 	.DW	UART_PREINIT
 #ENDIF
+#IF (DUARTENABLE)
+	.DW	DUART_PREINIT
+#ENDIF
 #IF (SIOENABLE)
 	.DW	SIO_PREINIT
 #ENDIF
@@ -1671,14 +1673,14 @@ HB_INITTBL:
 #IF (CTCENABLE)
 	.DW	CTC_INIT
 #ENDIF
-#IF (AY38910ENABLE)
-	.DW	AY38910_INIT		; AUDIBLE INDICATOR OF BOOT START
+#IF (SPKENABLE)
+	.DW	SP_INIT			; AUDIBLE INDICATOR OF BOOT START
 #ENDIF
 #IF (SN76489ENABLE)
 	.DW	SN76489_INIT
 #ENDIF
-#IF (SPKENABLE)
-	.DW	SP_INIT			; AUDIBLE INDICATOR OF BOOT START
+#IF (AY38910ENABLE)
+	.DW	AY38910_INIT		; AUDIBLE INDICATOR OF BOOT START
 #ENDIF
 #IF (ASCIENABLE)
 	.DW	ASCI_INIT
@@ -1686,6 +1688,9 @@ HB_INITTBL:
 #IF (UARTENABLE)
 	.DW	UART_INIT
 #ENDIF
+#IF (DUARTENABLE)
+	.DW	DUART_INIT
+#ENDIF
 #IF (SIOENABLE)
 	.DW	SIO_INIT
 #ENDIF
@@ -3151,6 +3156,15 @@ SIZ_UART	.EQU	$ - ORG_UART
 		.ECHO	" bytes.\n"
 #ENDIF
 ;
+#IF (DUARTENABLE)
+ORG_DUART	.EQU	$
+  #INCLUDE "duart.asm"
+SIZ_DUART	.EQU	$ - ORG_DUART
+		.ECHO	"DUART occupies "
+		.ECHO	SIZ_DUART
+		.ECHO	" bytes.\n"
+#ENDIF
+;
 #IF (SIOENABLE)
 ORG_SIO		.EQU	$
   #INCLUDE "sio.asm"
@@ -3666,15 +3680,10 @@ PRTSUM:
 	LD	C,BF_SYSGET_DIOCNT	; DISK DRIVES
 	LD	HL,PS_DISK
 	CALL	PRT_ALLD
-;
+
 	LD	C,BF_SYSGET_VDACNT	; VIDEO DEVICES
 	LD	HL,PS_VIDEO
 	CALL	PRT_ALLD
-
-	LD	C,BF_SYSGET_SNDCNT	; SOUND DEVICES
-	LD	HL,PS_SOUND
-	CALL	PRT_ALLD
-;
 	RET
 ;
 PRT_ALLD:
@@ -4017,56 +4026,6 @@ PS_PRTVC:
 	CALL	PRTDECB
 	RET
 ;
-; PRINT SOUND CONFIG
-;
-PS_SOUND:
-	PUSH	BC
-
-	; UNIT COLUMN
-	PRTS("Sound $")
-	LD	A,C			; MOVE UNIT NUM TO A
-	CALL	PRTDECB			; PRINT IT
-	CP	10			; CHECK FOR MULTIPLE DIGITS
-	CALL	C,PC_SPACE		; EXTRA SPACE IF NEEDED
-	PRTS("    $")			; PAD TO NEXT COLUMN
-
-	; DEVICE COLUMN
-	
-	PUSH	BC			; 
-	LD	E,C
-	XOR	A
-	LD	DE,PS_SDSND		; POINT TO DEVICE TYPE NAME TABLE
-	CALL	PRTIDXDEA		; PRINT  DEVICE NMEMONIC PADDED TO FIELD WIDTH
-	LD	A,C			; MOVE UNIT NUM TO A
-	CALL	PRTDECB			; PRINT IT
-	CALL	PC_COLON
-	CP	10			; CHECK FOR MULTIPLE DIGITS
-	CALL	C,PC_SPACE		; EXTRA SPACE IF NEEDED
-	LD	A,(PRTIDXCNT)
-	SUB	9+1
-	CPL
-	CALL	PS_PAD
-	POP	BC
-
-	; DEVICE TYPE
-;
-	LD	B,BF_SNDQUERY		; FUNC=GET DEVICE INFO, UNIT NUM STILL IN C
-	LD	E,BF_SNDQ_DEV
-	RST	08
-	LD	A,B
-	DEC	A
-	LD	DE,PS_SDSN76489
-	CALL	PRTIDXDEA
-	LD	A,(PRTIDXCNT)
-	SUB	18+1
-	CPL
-	CALL	PS_PAD			; PAD N SPACES (SPECIFIED IN A)
-;
-	CALL	NEWLINE
-;
-	POP	BC
-	RET
-;
 ; PRINT DEVICE NMEMONIC, DEVTYP/NUM SPECIFIED IN DE
 ;
 PS_PRTDEV:
@@ -4075,7 +4034,6 @@ PS_PRTDEV:
 	RRCA
 	RRCA
 	RRCA
-PS_PRTDEV1:
 	RLCA				; X2 FOR WORD OFFSET IN STRING TABLE
 	CALL	ADDHLA
 	LD	A,(HL)
@@ -4097,9 +4055,10 @@ PS_PRTNUL:
 	LD	HL,PS_STRNUL
 	; FALL THRU TO PS_PRT
 ;
-; PRINT STRING AT (HL), $ TERM, RETURN CHARS PRINTED IN C
+;
 ;
 PS_PRT:
+	; PRINT STRING AT (HL), $ TERM, RETURN CHARS PRINTED IN C
 	LD	C,0			; INIT CHAR COUNT
 PS_PRT1:
 	LD	A,(HL)			; GET CHAR
@@ -4110,9 +4069,10 @@ PS_PRT1:
 	INC	C			; BUMP COUNTER
 	JR	PS_PRT1			; AND LOOP
 ;
-; PAD N SPACES SPECIFIED IN A
+;
 ;
 PS_PAD:
+	; PAD N SPACES SPECIFIED IN A
 	LD	B,A
 	LD	A,' '
 PS_PAD1:
@@ -4179,7 +4139,7 @@ PS_FLP_DSTR:	.TEXT	"SD$"		; PS_FLPSD
 ;
 PS_SDSTRREF:
 	.DW	PS_SDUART, PS_SDASCI, PS_SDTERM
-	.DW	PS_SDPRPCON, PS_SDPPPCON, PS_SDSIO, PS_SDACIA, PS_SDPIO,PS_SDUF
+	.DW	PS_SDPRPCON, PS_SDPPPCON, PS_SDSIO, PS_SDACIA, PS_SDPIO,PS_SDUF,PS_SDDUART
 ;
 PS_SDUART	.TEXT	"UART$"
 PS_SDASCI	.TEXT	"ASCI$"
@@ -4190,6 +4150,7 @@ PS_SDSIO	.TEXT	"SIO$"
 PS_SDACIA	.TEXT	"ACIA$"
 PS_SDPIO	.TEXT	"PORT$"
 PS_SDUF		.TEXT	"UF$"
+PS_SDDUART	.TEXT	"DUART$"
 ;
 ; CHARACTER SUB TYPE STRINGS
 ;
@@ -4221,16 +4182,6 @@ PS_VDVGA	.TEXT	"VGA$"
 ;
 PS_VTCRT	.TEXT	"CRT$"
 ;
-; SOUND DEVICE STRINGS
-;
-PS_SDSND	.TEXT	"SND$"
-;
-; SOUND TYPE STRINGS
-;
-PS_SDSN76489	.TEXT	"SN76489$"
-PS_SDAY38910	.TEXT	"AY-3-8910$"
-PS_SDBITMODE	.TEXT	"BITMODE$"
-;
 ;			 0	   1	     2	       3	 4	   5	     6	       7
 ;			 01234567890123456789012345678901234567890123456789012345678901234567890123456789
 PS_STRHDR	.TEXT	"Unit        Device      Type              Capacity/Mode\r\n"