diff --git a/Source/Apps/assign.asm b/Source/Apps/assign.asm
index c080991b..a3ed2981 100644
--- a/Source/Apps/assign.asm
+++ b/Source/Apps/assign.asm
@@ -27,6 +27,7 @@
 ;   2020-05-06 [WBW] Add patch level to version compare
 ;   2020-05-10 [WBW] Set media change flag in XDPH for CP/M 3
 ;   2020-05-12 [WBW] Back out media change flag
+;   2021-12-06 [WBW] Fix inverted ROM/RAM DPB mapping in buffer alloc
 ;_______________________________________________________________________________
 ;
 ; ToDo:
@@ -639,7 +640,7 @@ makdphwbw:	; determine appropriate dpb (WBW mode, unit number in A)
 	jr	nz,makdph00	; if not, skip ahead to other types
 	ld	a,e		; physical unit number to A
 	ld	e,1		; assume rom
-	cp	$00		; rom?
+	cp	$01		; rom?
 	jr	z,makdph0	; yes, jump ahead
 	ld	e,2		; otherwise ram
 	jr	makdph0		; jump ahead
@@ -1567,6 +1568,23 @@ prtdec2:
 	call	prtchr
 	ret
 ;
+; Print a byte buffer in hex pointed to by DE
+; Register A has size of buffer
+;
+prthexbuf:
+	or	a
+	ret	z		; empty buffer
+;
+	ld	b,a
+prthexbuf1:
+	ld	a,' '
+	call	prtchr
+	ld	a,(de)
+	call	prthex
+	inc	de
+	djnz	prthexbuf1
+	ret
+;
 ; Start a new line
 ;
 crlf2:
@@ -1893,10 +1911,10 @@ stack	.equ	$		; stack top
 ; Messages
 ;
 indent	.db	"   ",0
-msgban1	.db	"ASSIGN v1.4 for RomWBW CP/M, 12-May-2020",0
+msgban1	.db	"ASSIGN v1.4a for RomWBW CP/M, 6-Dec-2021",0
 msghb	.db	" (HBIOS Mode)",0
 msgub	.db	" (UBIOS Mode)",0
-msgban2	.db	"Copyright 2020, Wayne Warthen, GNU GPL v3",0
+msgban2	.db	"Copyright 2021, Wayne Warthen, GNU GPL v3",0
 msguse	.db	"Usage: ASSIGN D:[=[{D:|<device>[<unitnum>]:[<slicenum>]}]][,...]",13,10
 	.db	"  ex. ASSIGN           (display all active assignments)",13,10
 	.db	"      ASSIGN /?        (display version and usage)",13,10
diff --git a/Source/CBIOS/cbios.asm b/Source/CBIOS/cbios.asm
index 4bb0b22e..0c8c14d8 100644
--- a/Source/CBIOS/cbios.asm
+++ b/Source/CBIOS/cbios.asm
@@ -3059,12 +3059,12 @@ MAKDPH0:
 	; RAM/ROM DISK DPB DERIVATION
 	; TYPE OF MEMORY DISK (RAM/ROM) DETERMINED BY PHYSICAL UNIT NUMBER
 	LD	A,E		; LOAD PHYSICAL UNIT NUMBER
-	LD	DE,DPB_ROM	; PRELOAD ROM DISK DPB
-	OR	A		; UNIT=0 (ROM)?
-	JR	Z,MAKDPH1	; IF UNIT=0, IT IS ROM, PROCEED TO DPH CREATION
 	LD	DE,DPB_RAM	; PRELOAD RAM DISK DPB
-	CP	$01		; UNIT=1 (RAM)?
-	JR	Z,MAKDPH1	; IF UNIT=0, IT IS ROM, PROCEED TO DPH CREATION
+	OR	A		; UNIT=0 (RAM)?
+	JR	Z,MAKDPH1	; IF SO, CREATE RAM DISK DPH
+	LD	DE,DPB_ROM	; PRELOAD ROM DISK DPB
+	CP	$01		; UNIT=1 (ROM)?
+	JR	Z,MAKDPH1	; IF SO, CREATE ROM DISK DPH
 	CALL	PANIC		; OTHERWISE UNKNOWN, NOT POSSIBLE, JUST PANIC
 ;
 #ENDIF
diff --git a/Source/ver.inc b/Source/ver.inc
index f6f1e50c..9da70da2 100644
--- a/Source/ver.inc
+++ b/Source/ver.inc
@@ -2,4 +2,4 @@
 #DEFINE	RMN	1
 #DEFINE	RUP	1
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"3.1.1-pre.141"
+#DEFINE BIOSVER	"3.1.1-pre.142"
diff --git a/Source/ver.lib b/Source/ver.lib
index 3f1fcee4..e0ffb279 100644
--- a/Source/ver.lib
+++ b/Source/ver.lib
@@ -3,5 +3,5 @@ rmn	equ	1
 rup	equ	1
 rtp	equ	0
 biosver	macro
-	db	"3.1.1-pre.141"
+	db	"3.1.1-pre.142"
 	endm