diff --git a/Doc/ChangeLog.txt b/Doc/ChangeLog.txt
index c43442dc..c92bcd57 100644
--- a/Doc/ChangeLog.txt
+++ b/Doc/ChangeLog.txt
@@ -3,6 +3,8 @@ Version 3.1
 - WBW: Refactored ROM Loader
 - WBW: INTRTC periodic timer based clock
 - WBW: FDISK80 updated to allow reserving up to 256 slices
+- WBW: Added support dual 16C550 UART on RC2014 platform
+- WBW: Made .com images smaller (contain only Z-System now)
 
 Version 3.0.1
 -------------
diff --git a/Doc/RomWBW Applications.pdf b/Doc/RomWBW Applications.pdf
index d15a5275..ed1cd38b 100644
Binary files a/Doc/RomWBW Applications.pdf and b/Doc/RomWBW Applications.pdf differ
diff --git a/Doc/RomWBW Architecture.pdf b/Doc/RomWBW Architecture.pdf
index e12f8ade..10bbc123 100644
Binary files a/Doc/RomWBW Architecture.pdf and b/Doc/RomWBW Architecture.pdf differ
diff --git a/Doc/RomWBW Getting Started.pdf b/Doc/RomWBW Getting Started.pdf
index 5e39d55a..dabf18a4 100644
Binary files a/Doc/RomWBW Getting Started.pdf and b/Doc/RomWBW Getting Started.pdf differ
diff --git a/ReadMe.md b/ReadMe.md
index c321ce02..8c4346c4 100644
--- a/ReadMe.md
+++ b/ReadMe.md
@@ -3,7 +3,7 @@
 ## Z80/Z180 System Software
 
 Version 3.1 Pre-release  
-Monday 30 March 2020
+Saturday 11 April 2020
 
 Wayne Warthen <wwarthen@gmail.com>
 
@@ -1007,14 +1007,6 @@ through the normal startup process just like it was started from ROM.
 However, your ROM has not been updated and the next time you boot your
 system, it will revert to the system image contained in ROM.
 
-There are two restrictions to be aware of related to loading a system
-image as a .com application. First, this is only supported under
-Z-System and CP/M 2.2. You must boot into one of these OSes before
-attempting to launch the .com file. Second, you may find that you are
-unable to load the .com file because it is too large to fit in available
-application RAM (TPA). Your only recourse in this situation is to build
-a custom ROM with fewer features.
-
 If you do not have easy access to a ROM programmer, it is usually
 possible to reprogram your system ROM using the FLASH utility from Will
 Sowerbutts. This application, called FLASH.COM, can be found on the ROM
diff --git a/ReadMe.txt b/ReadMe.txt
index c9b01d5c..f47dcf47 100644
--- a/ReadMe.txt
+++ b/ReadMe.txt
@@ -3,7 +3,7 @@ RomWBW
 Z80/Z180 System Software
 
 Version 3.1 Pre-release
-Monday 30 March 2020
+Saturday 11 April 2020
 
 Wayne Warthen wwarthen@gmail.com
 
@@ -1031,14 +1031,6 @@ through the normal startup process just like it was started from ROM.
 However, your ROM has not been updated and the next time you boot your
 system, it will revert to the system image contained in ROM.
 
-There are two restrictions to be aware of related to loading a system
-image as a .com application. First, this is only supported under
-Z-System and CP/M 2.2. You must boot into one of these OSes before
-attempting to launch the .com file. Second, you may find that you are
-unable to load the .com file because it is too large to fit in available
-application RAM (TPA). Your only recourse in this situation is to build
-a custom ROM with fewer features.
-
 If you do not have easy access to a ROM programmer, it is usually
 possible to reprogram your system ROM using the FLASH utility from Will
 Sowerbutts. This application, called FLASH.COM, can be found on the ROM
diff --git a/Source/Doc/GettingStarted.md b/Source/Doc/GettingStarted.md
index ba84859b..345c768b 100644
--- a/Source/Doc/GettingStarted.md
+++ b/Source/Doc/GettingStarted.md
@@ -1058,14 +1058,6 @@ through the normal startup process just like it was started from ROM.
 However, your ROM has not been updated and the next time you boot your
 system, it will revert to the system image contained in ROM.
 
-There are two restrictions to be aware of related to loading a system
-image as a .com application.  First, this is only supported under
-Z-System and CP/M 2.2.  You must boot into one of these OSes before
-attempting to launch the .com file.  Second, you may find that you
-are  unable to load the .com file because it is too large to fit in
-available application RAM (TPA).  Your only recourse in this
-situation  is to build a custom ROM with fewer features.
-
 If you do not have easy access to a ROM programmer, it is usually
 possible to reprogram your system ROM using the FLASH utility from
 Will Sowerbutts. This application, called FLASH.COM, can be found on the
diff --git a/Source/HBIOS/Build.ps1 b/Source/HBIOS/Build.ps1
index ff098d8e..e82b67aa 100644
--- a/Source/HBIOS/Build.ps1
+++ b/Source/HBIOS/Build.ps1
@@ -184,9 +184,12 @@ if ($Platform -ne "UNA")
 #
 "Building ${RomName} output files..."
 
-# Build 32K OS chunk containing the loader, debug monitor, and OS images
+# Build 32K OS chunk containing the loader, debug monitor, and two OS images
 Concat 'romldr.bin', 'eastaegg.bin','dbgmon.bin', "..\cpm22\cpm_${Bios}.bin", "..\zsdos\zsys_${Bios}.bin" osimg.bin
 
+# Build 20K OS chunk containing the loader, debug monitor, and one OS image
+Concat 'romldr.bin', 'eastaegg.bin','dbgmon.bin', "..\zsdos\zsys_${Bios}.bin" osimg_small.bin
+
 # Build second 32K chunk containing supplemental ROM apps (not for UNA)
 if ($Platform -ne "UNA")
 {
@@ -237,8 +240,8 @@ if ($Platform -eq "UNA")
 else 
 {
 	Concat 'hbios_rom.bin','osimg.bin','osimg1.bin','osimg.bin',$RomDiskFile $RomFile
-	Concat 'hbios_app.bin','osimg.bin' $ComFile
-	# Concat 'hbios_img.bin','osimg.bin' $ImgFile
+	Concat 'hbios_app.bin','osimg_small.bin' $ComFile
+	# Concat 'hbios_img.bin','osimg_small.bin' $ImgFile
 }
 
 # Remove the temporary working ROM disk file
diff --git a/Source/HBIOS/Build.sh b/Source/HBIOS/Build.sh
index 24abfa41..86f8c05a 100755
--- a/Source/HBIOS/Build.sh
+++ b/Source/HBIOS/Build.sh
@@ -100,6 +100,7 @@ fi
 echo "Building $romname output files..."
 
 cat romldr.bin eastaegg.bin dbgmon.bin ../CPM22/cpm_$BIOS.bin ../ZSDOS/zsys_$BIOS.bin >osimg.bin
+cat romldr.bin eastaegg.bin dbgmon.bin ../ZSDOS/zsys_$BIOS.bin >osimg_small.bin
 
 if [ $platform != UNA ] ; then
 	cat camel80.bin nascom.bin tastybasic.bin game.bin imgpad0.bin usrrom.bin >osimg1.bin
@@ -146,8 +147,8 @@ if [ $platform = UNA ] ; then
 	cat ../UBIOS/UNA-BIOS.BIN osimg.bin ../UBIOS/FSFAT.BIN $romdiskfile >$romname.rom
 else
 	cat hbios_rom.bin osimg.bin osimg1.bin osimg.bin $romdiskfile >$romname.rom
-	cat hbios_app.bin osimg.bin > $romname.com
-	cat hbios_img.bin osimg.bin > $romname.img
+	cat hbios_app.bin osimg_small.bin > $romname.com
+	# cat hbios_img.bin osimg_small.bin > $romname.img
 fi
 
 #rm $romdiskfile
diff --git a/Source/HBIOS/dsrtc.asm b/Source/HBIOS/dsrtc.asm
index 0f8c52ef..607cc6aa 100644
--- a/Source/HBIOS/dsrtc.asm
+++ b/Source/HBIOS/dsrtc.asm
@@ -85,7 +85,7 @@
 ;
 #IF (DSRTCMODE == DSRTCMODE_STD)
 ;
-DSRTC_BASE	.EQU	RTCIO		; RTC PORT
+DSRTC_IO	.EQU	RTCIO		; RTC PORT
 ;
 DSRTC_DATA	.EQU	%10000000	; BIT 7 IS RTC DATA OUT
 DSRTC_CLK	.EQU	%01000000	; BIT 6 IS RTC CLOCK (CLK)
@@ -95,6 +95,10 @@ DSRTC_CE	.EQU	%00010000	; BIT 4 IS CHIP ENABLE (CE)
 DSRTC_MASK	.EQU	%11110000	; MASK FOR BITS WE OWN IN RTC LATCH PORT
 DSRTC_IDLE	.EQU	%00100000	; QUIESCENT STATE
 ;
+RTCDEF		.SET	DSRTC_IDLE	; FOR HBIOS MAINLINE
+;
+#DEFINE	DSRTC_OPRVAL	RTCVAL
+;
 ; VALUES FOR DIFFERENT BATTERY OR SUPERCAPACITOR CHARGE RATES
 ;
 DS1d2k		.EQU	%10100101	; 1 DIODE 2K RESISTOR (DEFAULT)
@@ -108,7 +112,7 @@ DS2d8k		.EQU	%10101011	; 2 DIODES 8K RESISTOR
 ;
 #IF (DSRTCMODE == DSRTCMODE_MFPIC)
 ;
-DSRTC_BASE	.EQU	$43		; RTC PORT ON MF/PIC
+DSRTC_IO	.EQU	$43		; RTC PORT ON MF/PIC
 ;
 DSRTC_DATA	.EQU	%00000001	; BIT 0 IS RTC DATA OUT
 DSRTC_CLK	.EQU	%00000100	; BIT 2 IS RTC CLOCK (CLK)
@@ -116,11 +120,11 @@ DSRTC_WR	.EQU	%00000010	; BIT 1 IS DATA DIRECTION (WE)
 DSRTC_CE	.EQU	%00001000	; BIT 3 CHIP ENABLE (/CE)
 ;
 DSRTC_MASK	.EQU	%00001111	; MASK FOR BITS WE OWN IN RTC LATCH PORT
-DSRTC_IDLE	.EQU	%00101000	; QUIESCENT STATE
+DSRTC_IDLE	.EQU	%00001000	; QUIESCENT STATE
 ;
-#ENDIF
+#DEFINE	DSRTC_OPRVAL	DSRTC_RTCVAL
 ;
-RTCDEF		.SET	DSRTC_IDLE	; FOR HBIOS MAINLINE
+#ENDIF
 ;
 DSRTC_BUFSIZ	.EQU	7		; 7 BYTE BUFFER (YYMMDDHHMMSSWW)
 ;
@@ -130,10 +134,10 @@ DSRTC_PREINIT:
 ;
 	; SET RELEVANT BITS IN RTC LATCH SHADOW REGISTER
 	; TO THEIR QUIESENT STATE
-	LD	A,(RTCVAL)		; GET CURRENT SHADOW REG VAL
+	LD	A,(DSRTC_OPRVAL)	; GET CURRENT SHADOW REG VAL
 	AND	~DSRTC_MASK		; CLEAR OUR BITS
 	OR	DSRTC_IDLE		; SET OUR IDLE BITS
-	LD	(RTCVAL),A		; SAVE IT
+	LD	(DSRTC_OPRVAL),A	; SAVE IT
 ;
 	CALL	DSRTC_DETECT		; HARDWARE DETECTION
 	LD	(DSRTC_STAT),A		; SAVE RESULT
@@ -167,7 +171,7 @@ DSRTC_INIT:
 ;
 	; PRINT RTC LATCH PORT ADDRESS
 	PRTS(" IO=0x$")			; LABEL FOR IO ADDRESS
-	LD	A,DSRTC_BASE		; GET IO ADDRESS
+	LD	A,DSRTC_IO		; GET IO ADDRESS
 	CALL	PRTHEXBYTE		; PRINT IT
 ;
 	; CHECK PRESENCE STATUS
@@ -541,15 +545,15 @@ DSRTC_WRCLK1:
 ;   5) PUT COMMAND
 ;
 DSRTC_CMD:
-	LD	A,(RTCVAL)		; INIT A WITH QUIESCENT STATE
-	OUT	(DSRTC_BASE),A		; WRITE TO PORT
+	LD	A,(DSRTC_OPRVAL)	; INIT A WITH QUIESCENT STATE
+	OUT	(DSRTC_IO),A		; WRITE TO PORT
 	CALL	DLY2			; DELAY 2 * 27 T-STATES
 #IF (DSRTCMODE == DSRTCMODE_MFPIC)
 	AND	~DSRTC_CE		; ASSERT CE (LOW)
 #ELSE
 	OR	DSRTC_CE		; ASSERT CE (HIGH)
 #ENDIF
-	OUT	(DSRTC_BASE),A		; WRITE TO RTC PORT
+	OUT	(DSRTC_IO),A		; WRITE TO RTC PORT
 	CALL	DLY2			; DELAY 2 * 27 T-STATES
 	CALL	DSRTC_PUT		; WRITE IT
 	RET
@@ -577,7 +581,7 @@ DSRTC_PUT:
 #ENDIF
 DSRTC_PUT1:
 	AND	~DSRTC_CLK		; SET CLOCK LOW
-	OUT	(DSRTC_BASE),A		; DO IT
+	OUT	(DSRTC_IO),A		; DO IT
 	CALL	DLY1			; DELAY 27 T-STATES
 	
 #IF (DSRTCMODE == DSRTCMODE_MFPIC)
@@ -589,9 +593,9 @@ DSRTC_PUT1:
 	RR	E			; ROTATE NEXT BIT TO SEND INTO CARRY
 	RRA				; ROTATE BITS BACK TO CORRECT POSTIIONS
 #ENDIF	
-	OUT	(DSRTC_BASE),A		; ASSERT DATA BIT ON BUS
+	OUT	(DSRTC_IO),A		; ASSERT DATA BIT ON BUS
 	OR	DSRTC_CLK		; SET CLOCK HI
-	OUT	(DSRTC_BASE),A		; DO IT
+	OUT	(DSRTC_IO),A		; DO IT
 	CALL	DLY1			; DELAY 27 T-STATES
 	DJNZ	DSRTC_PUT1		; LOOP IF NOT DONE
 	RET
@@ -620,15 +624,15 @@ DSRTC_GET:
 #ENDIF
 DSRTC_GET1:
 	AND	~DSRTC_CLK		; SET CLK LO
-	OUT	(DSRTC_BASE),A		; WRITE TO RTC PORT
+	OUT	(DSRTC_IO),A		; WRITE TO RTC PORT
 	CALL	DLY1			; DELAY 2 * 27 T-STATES
 	PUSH	AF			; SAVE PORT VALUE
-	IN	A,(DSRTC_BASE)		; READ THE RTC PORT
+	IN	A,(DSRTC_IO)		; READ THE RTC PORT
 	RRA				; DATA BIT TO CARRY
 	RR	E			; SHIFT INTO WORKING VALUE
 	POP	AF			; RESTORE PORT VALUE
 	OR	DSRTC_CLK		; CLOCK BACK TO HI
-	OUT	(DSRTC_BASE),A		; WRITE TO RTC PORT
+	OUT	(DSRTC_IO),A		; WRITE TO RTC PORT
 	CALL	DLY1			; DELAY 27 T-STATES
 	DJNZ	DSRTC_GET1		; LOOP IF NOT DONE (13)
 	RET
@@ -640,8 +644,8 @@ DSRTC_GET1:
 ;   1) SET ALL LINES BACK TO QUIESCENT STATE
 ;
 DSRTC_END:
-	LD	A,(RTCVAL)		; INIT A WITH QUIESCENT STATE
-	OUT	(DSRTC_BASE),A		; WRITE TO PORT
+	LD	A,(DSRTC_OPRVAL)	; INIT A WITH QUIESCENT STATE
+	OUT	(DSRTC_IO),A		; WRITE TO PORT
 	RET				; RETURN
 ;
 ; WORKING VARIABLES
@@ -649,6 +653,8 @@ DSRTC_END:
 DSRTC_STAT	.DB	0		; DEVICE STATUS (0=OK)
 DSRTC_TEMP	.DB	0		; TEMP VALUE STORAGE
 ;
+DSRTC_RTCVAL	.DB	DSRTC_IDLE	; LOCAL LATCH SHADOW FOR MFPIC
+;
 ; DSRTC_BUF IS USED FOR BURST READ/WRITE OF CLOCK DATA TO DS-1302
 ; FIELDS BELOW MATCH ORDER OF DS-1302 FIELDS (BCD)
 ;
diff --git a/Source/HBIOS/romldr.asm b/Source/HBIOS/romldr.asm
index c2f1af35..747dd032 100644
--- a/Source/HBIOS/romldr.asm
+++ b/Source/HBIOS/romldr.asm
@@ -115,7 +115,7 @@ start:
 	di
 #endif
 ;
-; Switch banked memory to user RAM bank and setup page zero.
+; Switch to user RAM bank
 ;
 #if (BIOS == BIOS_WBW)
 	ld	b,BF_SYSSETBNK		; HBIOS func: set bank
@@ -123,15 +123,24 @@ start:
 	rst	08			; do it
 	ld	a,c			; previous bank to A
 	ld	(bid_ldr),a		; save previous bank for later
+	cp	BID_IMG0		; starting from ROM?
 #endif
 ;
 #if (BIOS == BIOS_UNA)
 	ld	bc,$01FB		; UNA func: set bank
 	ld	de,BID_USR		; select user bank
 	rst	08			; do it
-	ld	a,c			; save previous bank
 	ld	(bid_ldr),de		; ... for later
+	ld	a,d			; starting from ROM?
+	or	e			; ... bank == 0?
 #endif
+;
+	; For app mode startup, use alternate table
+	ld	hl,ra_tbl		; assume ROM startup
+	jr	z,start1		; if so, ra_tbl OK, skip ahead
+	ld	hl,ra_tbl_app		; not ROM boot, get app tbl loc
+start1:
+	ld	(ra_tbl_loc),hl		; and overlay pointer
 ;
 ; Copy original page zero into user page zero
 ;
@@ -274,7 +283,7 @@ runcmd:
 	jp	z,reboot		; if so, do it
 ;
 	; Attempt ROM application launch
-	ld	ix,ra_tbl		; point to start of ROM app tbl
+	ld	ix,(ra_tbl_loc)		; point to start of ROM app tbl
 	ld	c,a			; save command in C
 runcmd1:
 	ld	a,(ix+ra_conkey)	; get match char
@@ -334,7 +343,7 @@ dskycmd:
 	jp	z,reboot		; if so, do it
 ;
 	; Attempt ROM application launch
-	ld	ix,ra_tbl		; point to start of ROM app tbl
+	ld	ix,(ra_tbl_loc)		; point to start of ROM app tbl
 	ld	c,a			; save DSKY key in C
 dskycmd1:
 	ld	a,(ix+ra_dskykey)	; get match char
@@ -374,7 +383,7 @@ applst:
 	ld	hl,str_applst
 	call	pstr
 	call	nl
-	ld	ix,ra_tbl
+	ld	ix,(ra_tbl_loc)
 applst1:
 	; check for end of table
 	ld	a,(ix)
@@ -1493,25 +1502,26 @@ ra_ent          .equ	12
 ; *_SIZ *_END and any code generated which does not include std.asm is
 ; synced.
 ;
-; Note: The loadable ROM images are placed in ROM banks bid_img0 and
-; bid_img1.  However, RomWBW supports a mechanism to load a complete
+; Note: The loadable ROM images are placed in ROM banks BID_IMG0 and
+; BID_IMG1.  However, RomWBW supports a mechanism to load a complete
 ; new system dynamically as a runnable application (see appboot and
-; imgboot in hbios.asm).  In this case, the contents of bid_img0 will
+; imgboot in hbios.asm).  In this case, the contents of BID_IMG0 will
 ; be pre-loaded into the currently executing ram bank thereby allowing
 ; those images to be dynamically loaded as well.  To support this
 ; concept, a pseudo-bank called bid_cur is used to specify the images
-; normally found in bid_img0.  In romload, this special value will cause
+; normally found in BID_IMG0.  In romload, this special value will cause
 ; the associated image to be loaded from the currently executing bank
 ; which will be correct regardless of the load mode.  Images in other
-; banks (bid_img1) will always be loaded directly from ROM.
+; banks (BID_IMG1) will always be loaded directly from ROM.
 ;
 ra_tbl:
+;
 ;      Name       Key      Dsky   Bank      Src    Dest     Size     Entry
 ;      ---------  -------  -----  --------  -----  -------  -------  ----------
-ra_ent(str_mon,   'M',     KY_CL, bid_cur,  $1000, MON_LOC, MON_SIZ, MON_SERIAL)
+ra_ent(str_mon,   'M',     KY_CL, BID_IMG0, $1000, MON_LOC, MON_SIZ, MON_SERIAL)
 ra_entsiz	.equ	$ - ra_tbl
-ra_ent(str_cpm22, 'C',     KY_BK, bid_cur,  $2000, CPM_LOC, CPM_SIZ, CPM_ENT)
-ra_ent(str_zsys,  'Z',     KY_FW, bid_cur,  $5000, CPM_LOC, CPM_SIZ, CPM_ENT)
+ra_ent(str_cpm22, 'C',     KY_BK, BID_IMG0, $2000, CPM_LOC, CPM_SIZ, CPM_ENT)
+ra_ent(str_zsys,  'Z',     KY_FW, BID_IMG0, $5000, CPM_LOC, CPM_SIZ, CPM_ENT)
 #if (BIOS == BIOS_WBW)
 ra_ent(str_fth,   'F',     KY_EX, BID_IMG1, $0000, FTH_LOC, FTH_SIZ, FTH_LOC)
 ra_ent(str_bas,   'B',     KY_DE, BID_IMG1, $1700, BAS_LOC, BAS_SIZ, BAS_LOC)
@@ -1520,9 +1530,21 @@ ra_ent(str_play,  'P',     $FF,   BID_IMG1, $4000, GAM_LOC, GAM_SIZ, GAM_LOC)
 ra_ent(str_user,  'U',     $FF,   BID_IMG1, $7000, USR_LOC, USR_SIZ, USR_LOC)
 #endif
 #if (DSKYENABLE)
-ra_ent(str_dsky,  'Y'+$80, KY_GO, bid_cur, $1000, MON_LOC, MON_SIZ, MON_DSKY)
+ra_ent(str_dsky,  'Y'+$80, KY_GO, bid_cur,  $1000, MON_LOC, MON_SIZ, MON_DSKY)
+#endif
+ra_ent(str_egg,   'E'+$80, $FF  , bid_cur,  $0E00, EGG_LOC, EGG_SIZ, EGG_LOC)
+		.dw	0		; table terminator
+;
+ra_tbl_app:
+;
+;      Name       Key      Dsky   Bank      Src    Dest     Size     Entry
+;      ---------  -------  -----  --------  -----  -------  -------  ----------
+ra_ent(str_mon,   'M',     KY_CL, bid_cur,  $1000, MON_LOC, MON_SIZ, MON_SERIAL)
+ra_ent(str_zsys,  'Z',     KY_FW, bid_cur,  $2000, CPM_LOC, CPM_SIZ, CPM_ENT)
+#if (DSKYENABLE)
+ra_ent(str_dsky,  'Y'+$80, KY_GO, bid_cur,  $1000, MON_LOC, MON_SIZ, MON_DSKY)
 #endif
-ra_ent(str_egg,   'E'+$80, $FF  , bid_cur, $0E00, EGG_LOC, EGG_SIZ, EGG_LOC)
+ra_ent(str_egg,   'E'+$80, $FF  , bid_cur,  $0E00, EGG_LOC, EGG_SIZ, EGG_LOC)
 		.dw	0		; table terminator
 ;
 str_mon		.db	"Monitor",0
@@ -1562,6 +1584,7 @@ bid_ldr		.ds	2		; bank at startup
 loadlba		.ds	4		; lba for load, dword
 #endif
 ;
+ra_tbl_loc	.ds	2		; points to active ra_tbl
 bootunit	.ds	1		; boot disk unit
 bootslice	.ds	1		; boot disk slice
 loadcnt		.ds	1		; num disk sectors to load
diff --git a/Source/HBIOS/sd.asm b/Source/HBIOS/sd.asm
index dc86ff13..b0b2e379 100644
--- a/Source/HBIOS/sd.asm
+++ b/Source/HBIOS/sd.asm
@@ -20,8 +20,8 @@
 ;
 ; CS = CHIP SELECT (AKA DAT3 FOR NON-SPI MODE)
 ; CLK = CLOCK
-; DI = DATA IN (HOST -> CARD, AKA CMD FOR NON-SPI MODE)
-; DO = DATA OUT (HOST <- CARD, AKA DAT0 FOR NON-SPI MODE)
+; DI = MOSI = DATA IN (HOST -> CARD, AKA CMD FOR NON-SPI MODE)
+; DO = MISO = DATA OUT (HOST <- CARD, AKA DAT0 FOR NON-SPI MODE)
 ;
 ; NOTES:
 ;   1) SIGNAL NAMES ARE FROM THE SD CARD SPEC AND ARE NAMED FROM THE
@@ -570,6 +570,7 @@ SD_INITUNIT2:
 	RET	Z			; IF NOT, DONE
 	PRTS(" WP$")			; NOTIFY USER
 ;
+	XOR	A			; SIGNAL SUCCESS
 	RET				; DONE
 ;
 ;----------------------------------------------------------------------
diff --git a/Source/ver.inc b/Source/ver.inc
index b88f2500..91ca16d7 100644
--- a/Source/ver.inc
+++ b/Source/ver.inc
@@ -2,4 +2,4 @@
 #DEFINE	RMN	1
 #DEFINE	RUP	0
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"3.1-pre.1"
+#DEFINE BIOSVER	"3.1-pre.2"
diff --git a/Source/ver.lib b/Source/ver.lib
index f16bd9f4..bc39cfbf 100644
--- a/Source/ver.lib
+++ b/Source/ver.lib
@@ -3,5 +3,5 @@ rmn	equ	1
 rup	equ	0
 rtp	equ	0
 biosver	macro
-	db	"3.1-pre.1"
+	db	"3.1-pre.2"
 	endm