diff --git a/Source/HBIOS/Makefile b/Source/HBIOS/Makefile
index 6a45ea2c..ea32f1c1 100644
--- a/Source/HBIOS/Makefile
+++ b/Source/HBIOS/Makefile
@@ -3,7 +3,7 @@ ifndef ROM_CONFIG
 endif
 
 ifdef ROM_PLATFORM
-	OBJECTS = ${ROM_PLATFORM}_${ROM_CONFIG}.rom ${ROM_PLATFORM}_${ROM_CONFIG}.com
+	OBJECTS = ${ROM_PLATFORM}_${ROM_CONFIG}.rom ${ROM_PLATFORM}_${ROM_CONFIG}.com ${ROM_PLATFORM}_${ROM_CONFIG}.upd
 else
 	OBJECTS += DYNO_std.rom DYNO_std.com DYNO_std.upd
 	OBJECTS += EZZ80_std.rom EZZ80_std.com EZZ80_std.upd
diff --git a/Source/HBIOS/md.asm b/Source/HBIOS/md.asm
index 53363889..2a899669 100644
--- a/Source/HBIOS/md.asm
+++ b/Source/HBIOS/md.asm
@@ -916,6 +916,9 @@ MD_FIDEN_R:				; THIS CODE GETS RELOCATED TO HIGH MEMORY
 ;	RET				
 ;
 MD_I_SZ	.EQU	$-MD_FIDEN_R		; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
+	.ECHO	"MD_FIDEN_R occupies "
+	.ECHO	MD_I_SZ
+	.ECHO	" bytes.\n"
 ;
 ;======================================================================
 ; ERASE FLASH SECTOR. 
@@ -979,6 +982,9 @@ MD_WT6:	EX	AF,AF'			; RETURN TO ORIGINAL BANK
 ;	RET				
 ;
 MD_S_SZ	.EQU	$-MD_FERAS_R		; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
+	.ECHO	"MD_FERAS_R occupies "
+	.ECHO	MD_S_SZ
+	.ECHO	" bytes.\n"
 ;
 ;======================================================================
 ; FLASH READ SECTOR. 
@@ -1003,14 +1009,16 @@ MD_FREAD_R:				; THIS CODE GETS RELOCATED TO HIGH MEMORY
 	LD	L,D			; ADDRESS
 ;
 	EX	AF,AF'			; PUT DESTINATION BANK IN AF'
-	LD	A,B			; PUT SOURCE BANK IN AF
 ;
 MD_FRD1:	
+	LD	A,B			; PUT SOURCE BANK IN AF
 	CALL	HBX_BNKSEL		; READ			; SWITCH TO SOURCE BANK
 	LD	C,(HL)			; BYTE
 ;	
 	EX	AF,AF'			; SELECT BANK 		; SWITCH DESTINATION BANK
+	PUSH	AF
 	CALL	HBX_BNKSEL		; TO WRITE
+	POP	AF
 	LD	(IX+0),C		; WRITE BYTE
 	EX	AF,AF'			;			; PUT SOURCE BANK IN AF
 ;
@@ -1024,6 +1032,9 @@ MD_FRD1:
 	RET				
 ;
 MD_R_SZ	.EQU	$-MD_FREAD_R		; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
+	.ECHO	"MD_FREAD_R occupies "
+	.ECHO	MD_R_SZ
+	.ECHO	" bytes.\n"
 ;
 ;======================================================================
 ; FLASH VERIFY SECTOR. 
@@ -1054,7 +1065,9 @@ MD_FVE1:
 	LD	A,(HL)			; READ BYTE
 ;
 	EX	AF,AF'			; SELECT BANK			; SWITCH TO RAM BANK
+	PUSH	AF
 	CALL	HBX_BNKSEL		; TO VERIFY AGAINST
+	POP	AF
 	EX	AF,AF'
 ;
 	SUB	(IX+0)			; COMPARE BYTE
@@ -1074,6 +1087,9 @@ MD_FVE2:
 	RET				
 ;
 MD_V_SZ	.EQU	$-MD_FVERI_R		; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
+	.ECHO	"MD_FVERI_R occupies "
+	.ECHO	MD_V_SZ
+	.ECHO	" bytes.\n"
 ;
 ;======================================================================
 ; FLASH WRITE SECTOR. 
@@ -1097,7 +1113,9 @@ MD_FWRIT_R:				; THIS CODE GETS RELOCATED TO HIGH MEMORY
 	LD	L,D			; ADDRESS
 ;
 MD_FWRI1:
+	PUSH	AF
 	CALL	HBX_BNKSEL		; SELECT BANK TO READ
+	POP	AF
 	EX	AF,AF'			; SAVE CURRENT BANK
 ;
 	LD	C,(IX+0)		; READ IN BYTE
@@ -1136,6 +1154,9 @@ MD_FW7:	LD	A,(HL)			; FROM THE SAME FLASH ADDRESS.
 ;	RET
 ;
 MD_W_SZ	.EQU	$-MD_FWRIT_R		; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
+	.ECHO	"MD_FWRIT_R occupies "
+	.ECHO	MD_W_SZ
+	.ECHO	" bytes.\n"
 ;
 ;======================================================================
 ;
diff --git a/Source/HBIOS/sd.asm b/Source/HBIOS/sd.asm
index f9b92a2a..b8df9f64 100644
--- a/Source/HBIOS/sd.asm
+++ b/Source/HBIOS/sd.asm
@@ -946,7 +946,11 @@ SD_INITCARD3:
 	LD	A,$40			; P0 = $40 INDICATES WE SUPPORT V2 CARDS
 	LD	(SD_CMDP0),A		; SET COMMAND PARM 0
 	CALL	SD_EXECCMDND		; EXEC COMMAND W/ NO DATA RETURNED
-	RET	NZ			; ABORT ON ERROR
+	;RET	NZ			; ABORT ON ERROR
+	CP	SD_STCMDERR		; COMMAND ERROR?
+	JR	Z,SD_INITCARD3A		; IF SO, TRY MMC CARD INIT
+	OR	A			; SET FLAGS
+	RET	NZ			; ABORT IF ANY OTHER ERROR
 	; CHECK FOR IDLE, EXIT LOOP IF IDLE CLEARED
 	LD	A,(SD_RC)		; GET CARD RESULT CODE
 	OR	A			; SET FLAGS
@@ -1316,6 +1320,8 @@ SD_INITCMD1:
 	INC	HL			; POINT TO NEXT BYTE
 	LD	(HL),A			; CLEAR IT
 	DJNZ	SD_INITCMD1		; LOOP TILL DONE
+	DEC	A			; $FF TO ACCUM
+	LD	(SD_CMDCRC),A		; PUT $FF IN CRC POSITION
 	RET
 ;
 ; EXECUTE APP COMMAND
diff --git a/Source/ver.inc b/Source/ver.inc
index c328bb6f..29bea73d 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.24"
+#DEFINE BIOSVER	"3.1.1-pre.27"
diff --git a/Source/ver.lib b/Source/ver.lib
index 09a3a0df..b773165e 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.24"
+	db	"3.1.1-pre.27"
 	endm