diff --git a/Doc/ChangeLog.txt b/Doc/ChangeLog.txt
index 2dbd6d4e..32bf83b9 100644
--- a/Doc/ChangeLog.txt
+++ b/Doc/ChangeLog.txt
@@ -47,6 +47,8 @@ Version 2.9.2
 - D?R: Contributed SC126 How-To: Preparing a MicroSD Card to Transfer Files to/from a Linux System
 - PMS: Updated romldr to handle more than 9 drives
 - PMS: Added "user" rom module template
+- PMS: Added CP/M 3 manuals
+- WBW: Boot from any slice
 
 Version 2.9.1
 -------------
diff --git a/ReadMe.txt b/ReadMe.txt
index a97cc170..98e06e8c 100644
--- a/ReadMe.txt
+++ b/ReadMe.txt
@@ -7,7 +7,7 @@
 ***********************************************************************
 
 Wayne Warthen (wwarthen@gmail.com)
-Version 2.9.2-pre.30, 2020-02-17
+Version 2.9.2-pre.31, 2020-02-18
 https://www.retrobrewcomputers.org/
 
 RomWBW is a ROM-based implementation of CP/M-80 2.2 and Z-System for 
diff --git a/Source/CBIOS/ver.inc b/Source/CBIOS/ver.inc
index 5861831f..1711ccfe 100644
--- a/Source/CBIOS/ver.inc
+++ b/Source/CBIOS/ver.inc
@@ -2,4 +2,4 @@
 #DEFINE	RMN	9
 #DEFINE	RUP	2
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"2.9.2-pre.30"
+#DEFINE BIOSVER	"2.9.2-pre.31"
diff --git a/Source/CPM22/ver.inc b/Source/CPM22/ver.inc
index 5861831f..1711ccfe 100644
--- a/Source/CPM22/ver.inc
+++ b/Source/CPM22/ver.inc
@@ -2,4 +2,4 @@
 #DEFINE	RMN	9
 #DEFINE	RUP	2
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"2.9.2-pre.30"
+#DEFINE BIOSVER	"2.9.2-pre.31"
diff --git a/Source/CPM3/biosldr.z80 b/Source/CPM3/biosldr.z80
index 60f0c047..87d3ff6a 100644
--- a/Source/CPM3/biosldr.z80
+++ b/Source/CPM3/biosldr.z80
@@ -88,9 +88,11 @@ boot1:
 	  else
 	
 	ld	bc,0F8E0h	; HBIOS func: get boot info
-	call	0FFF0h		; do it, D := boot unit
-	ld	a,d		; move to A
+	call	0FFF0h		; do it, D := boot unit, E: := slice
+	ld	a,d		; move unit to A
 	ld	(unit),a	; save it
+	ld	a,e		; move slice to A
+	ld	(slice),a	; save it
 
 	  endif
 
@@ -171,23 +173,48 @@ setdma:
 	ld	(dma),bc
 	ret
 read:
-	; Seek
+	ld	a,(unit)	; get unit
+	ld	c,a		; BIOS Disk Unit in C
+	ld	b,12H		; HBIOS SEEK function
+	push	bc		; save it
+	;push	de		; save XDPH pointer
+	ld	b,17h		; HBIOS DEVICE function
+	rst	08		; Do it, D=device type
+	ld	a,d		; put in accum
+	and	0F0h		; isolate high bits
+	ld	b,1		; assume it is floppy, 1 head bit
+	ld	c,01h		; 1 bit head mask
+	cp	10h		; floppy?
+	jr	z,seek0	; yup, skip ahead
+	ld	b,4		; must be hard disk, 4 head bits
+	ld	c,0Fh		; 4 bit head mask
+seek0:
+	;pop	de		; recover XDPH pointer
+	push	bc		; save bc
+	ld	a,(slice)	; get slice
+	ld	e,a		; slice to E
+	ld	h,65		; number of tracks per slice
+	call	mult8		; HL now has track offset for slice
+	pop	bc		; recover bc
+	push	hl		; save track offset for now
 	ld	hl,(trk)	; get track value
 	ld	a,l		; lsb of track to a
-	and	0FH		; isolate head in low 4 bits
-	ld	d,a		; stuff it in d
-	ld	a,(sect)	; get sector
-	ld	e,a		; stuff it in e
-	ld	b,4		; prepare to shift out 4 bit head value
-read1:                          
+	and	c		; apply mask
+	ld	d,a		; save in d
+seek1:                          
 	srl	h		; shift one bit out
 	rr	l		; ... of hl
-	djnz	read1		; do all 4 bits
-	ld	b,12h		; HBIOS seek
-	ld	a,(unit)	; get boot unit
-	ld	c,a		; put in C
+	djnz	seek1		; do all bits
+	ld	a,(sect)	; get sector
+	ld	e,a		; stuff it in e
+	ex	de,hl		; de=track, hl=head/sect
+	ex	(sp),hl		; save head/sect, hl = offset
+	add	hl,de		; hl has final track value
+	pop	de		; recover head/sect to de
+	pop	bc		; recover function & unit
 	;rst	08		; perform seek
 	call	0FFF0H
+
 	; Read Sector
 	ld	b,13h		; HBIOS read
 	ld	a,(unit)	; get boot unit
@@ -287,6 +314,23 @@ writestr2:
 	pop	af
 	ret
 
+;
+; multiply 8-bit values
+; in:  multiply h by e
+; out: hl = result, e = 0, b = 0
+;
+mult8:
+	ld	d,0
+	ld	l,d
+	ld	b,8
+mult8_loop:
+	add	hl,hl
+	jr	nc,mult8_noadd
+	add	hl,de
+mult8_noadd:
+	djnz	mult8_loop
+	ret
+
 prompt	db	13,10,'Boot CP/M 3 from Disk Unit: $'
 crlf	db	13,10,'$'
 
@@ -448,6 +492,7 @@ dtabcb:	db	0ffh		; drv
 	dw	dtabuf		; buffad
 
 unit	ds	1	; HBIOS unit number
+slice	ds	1	; HBIOS slice number
 trk	ds	2	; current track
 sect	ds	2	; current sector
 dma	ds	2	; current DMA address
diff --git a/Source/CPM3/boot.z80 b/Source/CPM3/boot.z80
index 3e1cf55b..ca0a0041 100644
--- a/Source/CPM3/boot.z80
+++ b/Source/CPM3/boot.z80
@@ -3,7 +3,7 @@
 	maclib	options.lib
 
 	public	?init,?ldccp,?rlccp,?time
-	public	@bootdu
+	public	@bootdu,@bootsl
 	extrn	?pmsg,?conin
 	extrn	?mvinit,?bnkxlt,?xmove,?move
 	extrn	@civec,@covec,@aivec,@aovec,@lovec
@@ -60,9 +60,11 @@ init$2:
 
 	; Get boot disk unit and save it
 	ld	bc,0F8E0h	; HBIOS func: get boot info
-	rst	08		; do it, D := boot unit
-	ld	a,d		; move to A
+	rst	08		; do it, D := boot unit, E: := boot slice
+	ld	a,d		; move boot unit to A
 	ld	(@bootdu),a	; save it
+	ld	a,e		; move boot slice to A
+	ld	(@bootsl),a	; save it
 
 	call	dinit
 	ret
@@ -720,7 +722,8 @@ fcb$nr		db	0,0,0
 
 	endif
 
-@bootdu		db	0
+@bootdu		db	0		; boot disk unit
+@bootsl		db	0		; boot slice
 hdspv		db	2		; slices per volume for hard disks (must be >= 1)
 drvlst		ds	32		; active drive list used durint drv_init
 drvlstc		db	0		; entry count for active drive list
diff --git a/Source/CPM3/diskio.z80 b/Source/CPM3/diskio.z80
index b951bfab..d5d27c57 100644
--- a/Source/CPM3/diskio.z80
+++ b/Source/CPM3/diskio.z80
@@ -14,7 +14,7 @@
     ; Linked BIOS variables
 
 	public	@sysdr
-	extrn	@bootdu
+	extrn	@bootdu,@bootsl
 
     ; Variables containing parameters passed by BDOS
 
@@ -323,18 +323,19 @@ dpb_fd111:	; 8" DS/DD Floppy Drive (1.11M)
 ;		called for first time initialization.
 
 dsk$init:
+	ld	a,(@rdrv)		; unit being initialized
+	ld	hl,@bootdu
+	cp	(hl)			; compare to boot unit
+	ret	nz			; done if no match
+	
 	inc	de			; point to slice in XDPH
 	inc	de
 	inc	de
 	ld	a,(de)			; get slice
-	or	a			; set flags
+	ld	hl,@bootsl
+	cp	(hl)			; compare to boot slice
 	ret	nz			; done if not zero
 
-	ld	a,(@rdrv)		; unit being initialized
-	ld	hl,@bootdu
-	cp	(hl)
-	ret	nz			; done if no match
-	
 	ld	a,(@adrv)		; get cp/m drive
 	ld	(@sysdr),a		; and save it
 	ret
@@ -531,7 +532,7 @@ seek1:
 	ld	a,(@sect)	; get sector
 	ld	e,a		; stuff it in e
 	ex	de,hl		; de=track, hl=head/sect
-	ex	(sp),hl	; save head/sect, hl = offset
+	ex	(sp),hl		; save head/sect, hl = offset
 	add	hl,de		; hl has final track value
 	pop	de		; recover head/sect to de
 	pop	bc		; recover function & unit
diff --git a/Source/CPM3/ver.inc b/Source/CPM3/ver.inc
index 81bc5d9b..edf94f0c 100644
--- a/Source/CPM3/ver.inc
+++ b/Source/CPM3/ver.inc
@@ -3,5 +3,5 @@ rmn	equ	9
 rup	equ	2
 rtp	equ	0
 biosver	macro
-	db	"2.9.2-pre.30"
+	db	"2.9.2-pre.31"
 	endm
diff --git a/Source/HBIOS/romldr.asm b/Source/HBIOS/romldr.asm
index 5c416f9d..9fb43746 100644
--- a/Source/HBIOS/romldr.asm
+++ b/Source/HBIOS/romldr.asm
@@ -308,6 +308,7 @@ MATS2:	LD	B,0		; WE GOT A MATCH FROM THE MENU TABLE. POINT
 ;
 MATD:	LD	B,A
 	LD	A,C		; IF INPUT WAS SERIAL 
+	LD	(BL_INPFLG),A	; SAVE INPUT FLAG
 	DEC	C		; CONVERT TO FROM. 
 	LD	A,B		; ASCII TO DECIMAL.
 	JR	Z,MATD1		; DSKY NUMBERS ARE 
@@ -562,9 +563,53 @@ GOROM2:	LD	B,BF_SYSSETCPY		; HBIOS FUNC: SETUP BANK COPY
 ;==================================================================================================
 ;
 GOBOOTDISK:
-	LD	(BL_BOOTID),A
+	LD	(BL_BOOTID),A		; SAVE INCOMING BOOTID
+;
+	; SET THE INITIAL BOOT UNIT AND SLICE
+	;LD	A,(BL_BOOTID)		; GET BOOTID
+	LD	(BL_DEVICE),A		; STORE IT
+	XOR	A			; LU DEFAULTS TO 0
+	LD	(BL_LU),A		; STORE IT
+;
+#IF (BIOS == BIOS_WBW)
+;
+	LD	A,(BL_INPFLG)		; GET INPUT FLAG
+	CP	1			; DSKY?
+	JR	Z,GOBOOTDISK1		; IF SO, SLICE 0 IS ASSUMED
+;
+	LD	A,(BL_DEVICE)		; GET BOOT DEVICE
+	LD	C,A			; PUT IN C
+	LD	B,BF_DIODEVICE		; HBIOS: DIO DEVICE FUNC
+	RST	08
+	LD	A,D			; DEVICE TYPE TO A
+	CP	DIODEV_IDE		; HARD DISK DEVICE?
+	JR	C,GOBOOTDISK1		; NOT SLICE WORTHY, SKIP AHEAD
+;
+	LD	DE,STR_SLICESEL		; SLICE SELECTION STRING
+	CALL	WRITESTR		; DISPLAY IT
+	CALL	CINUC			; GET THE KEY
+	CALL	COUT			; ECHO KEY
+;
+	LD	DE,STR_INVALID		; SETUP IN CASE OF INVALID
+	CP	13			; ENTER?
+	JR	Z,GOBOOTDISK1		; IF SO, DONE
+	CP	'0'			; START OF RANGE?
+	JP	C,MENU			; BACK TO MENU IF TOO LOW
+	CP	'9' + 1			; END OF RANGE
+	JP	NC,MENU			; BACK TO MENU IF TOO HIGH
+	SUB	'0'			; CONVERT TO BINARY
+	LD	(BL_LU),A		; AND SAVE IT
+GOBOOTDISK1:
+;
+#ENDIF
+;
 	LD	DE,STR_BOOTDISK
 	CALL	WRITESTR
+	LD	A,(BL_DEVICE)
+	CALL	PRTDECB
+	LD	DE,STR_BOOTDISK1
+	CALL	WRITESTR
+	LD	A,(BL_LU)
 	CALL	PRTDECB
 	PRTS("...$")
 #IF (DSKYENABLE)
@@ -572,7 +617,7 @@ GOBOOTDISK:
 	CALL 	DSKY_SHOWSEG		; DISPLAY MESSAGE
 #ENDIF
 ;
-	LD	DE,STR_BOOTDISK1	; DISK BOOT MESSAGE
+	LD	DE,STR_BOOTREAD	; DISK BOOT MESSAGE
 	CALL	WRITESTR		; PRINT IT
 ;	
 #IF (BIOS == BIOS_UNA)
@@ -601,12 +646,6 @@ GOBOOTDISK:
 	POP	AF			; RESTORE BOOT DEVICE
 	CP	E			; CHECK MAX (INDEX - COUNT)
 	JP	NC,DB_NODISK		; HANDLE INVALID SELECTION
-;
-	; SET THE BOOT UNIT AND SLICE
-	LD	A,(BL_BOOTID)		; GET BOOTID
-	LD	(BL_DEVICE),A		; STORE IT
-	XOR	A			; LU ALWAYS ZERO
-	LD	(BL_LU),A		; STORE IT
 ;
 	; SENSE MEDIA
 	LD	A,(BL_DEVICE)		; GET DEVICE/UNIT
@@ -938,14 +977,16 @@ DEV15	.EQU	DEVUNK
 ;
 STR_BANNER	.DB	"\r\n\r\n", PLATFORM_NAME, " Boot Loader$"
 STR_BOOTSEL	.DB	"\r\n\r\nBoot Selection? $"
+STR_SLICESEL	.DB	"    Slice(0-9)[0]? $"
 STR_BOOTDISK	.DB	"\r\n\r\nBooting Disk Unit $"
+STR_BOOTDISK1	.DB	", Slice $"
 STR_BOOTROM	.DB	"\r\n\r\nLoading $"
 STR_REBOOT	.DB	"\r\n\r\nRestarting System...$"
 STR_INVALID	.DB	"\r\n\r\n*** Invalid Selection ***$"
 STR_NODISK	.DB	"\r\n\r\nNo disk!$"
 STR_NOBOOT	.DB	"\r\n\r\nDisk not bootable!$"
 STR_BOOTERR	.DB	"\r\n\r\nBoot failure!$"
-STR_BOOTDISK1	.DB	"\r\n\r\nReading disk information...$"
+STR_BOOTREAD	.DB	"\r\n\r\nReading disk information...$"
 STR_LOADING	.DB	"\r\n\r\nLoading...$"
 ;
 #IF (DSKYENABLE)
@@ -1132,6 +1173,7 @@ SLACK:		.EQU	($8000 + LDR_SIZ - $)
 		.DS	64		; 32 LEVEL STACK
 BL_STACK	.EQU	$		; ... TOP IS HERE
 ;
+BL_INPFLG	.DS	1		; INPUT FLAG, 1=DSKY, 2=SERIAL
 BL_COUNT	.DS	1		; LOAD COUNTER
 BL_TIMEOUT	.DS	2		; AUTOBOOT TIMEOUT COUNTDOWN COUNTER
 BL_BOOTID	.DS	1		; BOOT DEVICE ID CHOSEN BY USER
diff --git a/Source/HBIOS/ver.inc b/Source/HBIOS/ver.inc
index 5861831f..1711ccfe 100644
--- a/Source/HBIOS/ver.inc
+++ b/Source/HBIOS/ver.inc
@@ -2,4 +2,4 @@
 #DEFINE	RMN	9
 #DEFINE	RUP	2
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"2.9.2-pre.30"
+#DEFINE BIOSVER	"2.9.2-pre.31"
diff --git a/Source/Images/Build.cmd b/Source/Images/Build.cmd
index dd90673c..ac05ba65 100644
--- a/Source/Images/Build.cmd
+++ b/Source/Images/Build.cmd
@@ -27,3 +27,5 @@ call BuildHD.cmd zpm3 ..\cpm3\cpmldr.sys
 call BuildHD.cmd ws4
 
 if exist ..\BPBIOS\bpbio-ww.rel call BuildHD.cmd bp
+
+copy /b ..\..\Binary\hd_cpm22.img + ..\..\Binary\hd_zsdos.img + ..\..\Binary\hd_nzcom.img + ..\..\Binary\hd_cpm3.img + ..\..\Binary\hd_zpm3.img + ..\..\Binary\hd_ws4.img ..\..\Binary\hd_combo.img
diff --git a/Source/ZSDOS/ver.inc b/Source/ZSDOS/ver.inc
index 5861831f..1711ccfe 100644
--- a/Source/ZSDOS/ver.inc
+++ b/Source/ZSDOS/ver.inc
@@ -2,4 +2,4 @@
 #DEFINE	RMN	9
 #DEFINE	RUP	2
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"2.9.2-pre.30"
+#DEFINE BIOSVER	"2.9.2-pre.31"