diff --git a/Source/HBIOS/cfg_master.asm b/Source/HBIOS/cfg_master.asm
index 9bc94944..8c3e18e2 100644
--- a/Source/HBIOS/cfg_master.asm
+++ b/Source/HBIOS/cfg_master.asm
@@ -161,7 +161,7 @@ FDMEDIAALT	.EQU	FDM720		; FD: ALTERNATE MEDIA FORMAT FDM[720|144|360|120|111]
 FDMAUTO		.EQU	TRUE		; FD: AUTO SELECT DEFAULT/ALTERNATE MEDIA FORMATS
 ;
 RFENABLE	.EQU	FALSE		; RF: ENABLE RAM FLOPPY DRIVER
-RFCNT		.EQU	1		; RF: NUMBER OF RAM FLOPPY UNITS (1-2)
+RFCNT		.EQU	1		; RF: NUMBER OF RAM FLOPPY UNITS (1-4)
 ;
 IDEENABLE	.EQU	FALSE		; IDE: ENABLE IDE DISK DRIVER (IDE.ASM)
 IDEMODE		.EQU	IDEMODE_NONE	; IDE: DRIVER MODE: IDEMODE_[DIO|DIDE]
diff --git a/Source/HBIOS/cfg_mk4.asm b/Source/HBIOS/cfg_mk4.asm
index 7291659f..ef2131dc 100644
--- a/Source/HBIOS/cfg_mk4.asm
+++ b/Source/HBIOS/cfg_mk4.asm
@@ -116,7 +116,7 @@ FDMEDIAALT	.EQU	FDM720		; FD: ALTERNATE MEDIA FORMAT FDM[720|144|360|120|111]
 FDMAUTO		.EQU	TRUE		; FD: AUTO SELECT DEFAULT/ALTERNATE MEDIA FORMATS
 ;
 RFENABLE	.EQU	FALSE		; RF: ENABLE RAM FLOPPY DRIVER
-RFCNT		.EQU	1		; RF: NUMBER OF RAM FLOPPY UNITS (1-2)
+RFCNT		.EQU	1		; RF: NUMBER OF RAM FLOPPY UNITS (1-4)
 ;
 IDEENABLE	.EQU	TRUE		; IDE: ENABLE IDE DISK DRIVER (IDE.ASM)
 IDEMODE		.EQU	IDEMODE_MK4	; IDE: DRIVER MODE: IDEMODE_[DIO|DIDE]
diff --git a/Source/HBIOS/cfg_n8.asm b/Source/HBIOS/cfg_n8.asm
index f63be838..0936dae8 100644
--- a/Source/HBIOS/cfg_n8.asm
+++ b/Source/HBIOS/cfg_n8.asm
@@ -119,7 +119,7 @@ FDMEDIAALT	.EQU	FDM720		; FD: ALTERNATE MEDIA FORMAT FDM[720|144|360|120|111]
 FDMAUTO		.EQU	TRUE		; FD: AUTO SELECT DEFAULT/ALTERNATE MEDIA FORMATS
 ;
 RFENABLE	.EQU	FALSE		; RF: ENABLE RAM FLOPPY DRIVER
-RFCNT		.EQU	1		; RF: NUMBER OF RAM FLOPPY UNITS (1-2)
+RFCNT		.EQU	1		; RF: NUMBER OF RAM FLOPPY UNITS (1-4)
 ;
 IDEENABLE	.EQU	FALSE		; IDE: ENABLE IDE DISK DRIVER (IDE.ASM)
 IDEMODE		.EQU	IDEMODE_DIO	; IDE: DRIVER MODE: IDEMODE_[DIO|DIDE]
diff --git a/Source/HBIOS/cfg_sbc.asm b/Source/HBIOS/cfg_sbc.asm
index 3622da7b..120b468c 100644
--- a/Source/HBIOS/cfg_sbc.asm
+++ b/Source/HBIOS/cfg_sbc.asm
@@ -119,7 +119,7 @@ FDMEDIAALT	.EQU	FDM720		; FD: ALTERNATE MEDIA FORMAT FDM[720|144|360|120|111]
 FDMAUTO		.EQU	TRUE		; FD: AUTO SELECT DEFAULT/ALTERNATE MEDIA FORMATS
 ;
 RFENABLE	.EQU	FALSE		; RF: ENABLE RAM FLOPPY DRIVER
-RFCNT		.EQU	1		; RF: NUMBER OF RAM FLOPPY UNITS (1-2)
+RFCNT		.EQU	1		; RF: NUMBER OF RAM FLOPPY UNITS (1-4)
 ;
 IDEENABLE	.EQU	FALSE		; IDE: ENABLE IDE DISK DRIVER (IDE.ASM)
 IDEMODE		.EQU	IDEMODE_DIO	; IDE: DRIVER MODE: IDEMODE_[DIO|DIDE]
diff --git a/Source/HBIOS/rf.asm b/Source/HBIOS/rf.asm
index a259a58a..30588a57 100644
--- a/Source/HBIOS/rf.asm
+++ b/Source/HBIOS/rf.asm
@@ -7,6 +7,8 @@
 ;
 RF_U0IO		.EQU	$A0
 RF_U1IO		.EQU	$A4
+RF_U2IO		.EQU	$A8
+RF_U3IO		.EQU	$AC
 ;
 ; IO PORT OFFSETS
 ;
@@ -18,24 +20,51 @@ RF_ST		.EQU	3
 ; MD DEVICE CONFIGURATION
 ;
 RF_DEVCNT	.EQU	RFCNT		; NUMBER OF RF DEVICES SUPPORTED
-RF_CFGSIZ	.EQU	6		; SIZE OF CFG TBL ENTRIES
+RF_CFGSIZ	.EQU	8		; SIZE OF CFG TBL ENTRIES
+RF_MAXRF	.EQU	4		; MAXIMUM NUMBERS OF DEVICES SUPPORTED
 ;
 RF_DEV	.EQU	0			; OFFSET OF DEVICE NUMBER (BYTE)
 RF_STAT	.EQU	1			; OFFSET OF STATUS (BYTE)
 RF_LBA	.EQU	2			; OFFSET OF LBA (DWORD)
+RF_IOAD	.EQU	7			; OFFSET OF DEVICE IO ADDRESS
+
+#IF ($RF_DEVCNT > RF_MAXRF)
+	.ECHO	"*** ONLY 4 RAM FLOPPY DEVICES SUPPORTED ***\n"
+RF_DEVCNT	.SET	RF_MAXRF	
+#ENDIF
 ;
 ; DEVICE CONFIG TABLE (RAM DEVICE FIRST TO MAKE IT ALWAYS FIRST DRIVE)
 ;
 RF_CFGTBL:
-	; DEVICE 0 ($A0)
+	; DEVICE 0
 	.DB	0			; DRIVER DEVICE NUMBER
 	.DB	0			; DEVICE STATUS
 	.DW	0,0			; CURRENT LBA
-#IF (RF_DEVCNT >= 2)
-	; DEVICE 1 ($A4)
+	.DB	0			; UNUSED
+	.DB	RF_U0IO			; DEVICE BASE ADDR
+#IF (RF_DEVCNT > 1)
+	; DEVICE 1
 	.DB	1			; DEVICE NUMBER
 	.DB	0			; DEVICE STATUS
 	.DW	0,0			; CURRENT LBA
+	.DB	0			; UNUSED
+	.DB	RF_U1IO			; DEVICE BASE ADDR
+#ENDIF
+#IF (RF_DEVCNT > 2)
+	; DEVICE 2
+	.DB	2			; DRIVER DEVICE NUMBER
+	.DB	0			; DEVICE STATUS
+	.DW	0,0			; CURRENT LBA
+	.DB	0			; UNUSED
+	.DB	RF_U2IO			; DEVICE BASE ADDR
+#ENDIF
+;	; DEVICE 3
+#IF (RF_DEVCNT > 3)
+	.DB	3			; DEVICE NUMBER
+	.DB	0			; DEVICE STATUS
+	.DW	0,0			; CURRENT LBA
+	.DB	0			; UNUSED
+	.DB	RF_U3IO			; DEVICE BASE ADDR
 #ENDIF
 ;
 #IF ($ - RF_CFGTBL) != (RF_DEVCNT * RF_CFGSIZ)
@@ -48,38 +77,12 @@ RF_CFGTBL:
 ;
 RF_INIT:
 	CALL	NEWLINE			; FORMATTING
-	PRTS("RF: IO=0x$")
-	LD		A,RF_U0IO
-	CALL	PRTHEXBYTE
-	PRTS(" DEVICES=$")		
-	LD		A,RF_DEVCNT
-	CALL	PRTDECB
-	PRTS(" WP=$")
-	IN		A,(RF_U0IO+3)
-	AND		1
-	JR		Z,NO_WP1
-	PRTS("ON$")
-	JR		D2_WP1
-NO_WP1:
-	PRTS("OFF$")
-D2_WP1:
-	#IF (RF_DEVCNT >= 2)	
-	IN		A,(RF_U1IO+3)
-	AND		1
-	JR		Z,NO_WP2
-	PRTS("-ON$")
-	JR		D2_WP2
-NO_WP2:
-	PRTS("-OFF$")	
-D2_WP2:
-	
-	#ENDIF
-;
-; SETUP THE DIO TABLE ENTRIES
-;
+	PRTS("RF:$")		
+
 	LD	B,RF_DEVCNT		; LOOP CONTROL
 	LD	IY,RF_CFGTBL		; START OF CFG TABLE
 RF_INIT0:
+	CALL	RF_UNIT
 	PUSH	BC			; SAVE LOOP CONTROL
 	LD	BC,RF_FNTBL		; BC := FUNC TABLE ADR
 	PUSH	IY			; CFG ENTRY POINTER
@@ -89,10 +92,30 @@ RF_INIT0:
 	ADD	IY,BC			; BUMP IY TO NEXT ENTRY
 	POP	BC			; RESTORE BC
 	DJNZ	RF_INIT0		; LOOP AS NEEDED
+
+	PRTS(" DEVICES=$")		; DISPLAY NUMBER	
+	LD	A,RF_DEVCNT		; OF DEVICES
+	CALL	PRTDECB
 ;
 	XOR	A			; INIT SUCCEEDED
 	RET				; RETURN
 ;
+RF_UNIT:
+	PRTS(" IO=0x$")			; DISPLAY
+	LD	A,(IY+RF_IOAD)		; PORT AND
+	CALL	PRTHEXBYTE		; WRITE 
+	PRTS(" WP=$")			; PROTECT
+	ADD	A,RF_ST			; STATUS OF
+	LD	C,A			; THIS DEVICE
+	IN	A,(C)
+	AND	1
+	JR	Z,RF_NO_WP1
+	PRTS("ON$")
+	RET
+RF_NO_WP1:
+	PRTS("OFF$")
+	RET
+;
 ;
 ;
 RF_FNTBL:
@@ -265,21 +288,9 @@ RF_WRSEC:
 ;
 ;
 RF_SETIO:
-	LD	A,(IY+RF_DEV)		; GET DEVICE NUM
-	OR	A			; SET FLAGS
-	JR	NZ,RF_SETIO1
-	LD	A,RF_U0IO
-	JR	RF_SETIO3
-RF_SETIO1:
-	DEC	A
-	JR	NZ,RF_SETIO2
-	LD	A,RF_U1IO
-	JR	RF_SETIO3
-RF_SETIO2:
-	CALL	PANIC			; INVALID UNIT
-RF_SETIO3:
-	LD	(RF_IO),A
-	RET
+	LD	A,(IY+RF_IOAD)		; GET THE IO PORT
+	LD	(RF_IO),A		; OF THE DEVICE WE
+	RET				; ARE WORKING ON
 ;
 ;
 ;