diff --git a/Source/CBIOS/cbios.asm b/Source/CBIOS/cbios.asm
index 969992e0..481d951c 100644
--- a/Source/CBIOS/cbios.asm
+++ b/Source/CBIOS/cbios.asm
@@ -432,6 +432,8 @@ WBOOT:
 #ENDIF
 ;
 #IFDEF PLTUNA
+	LD	SP,STACK		; STACK FOR INITIALIZATION
+
 	; RESTORE COMMAND PROCESSOR FROM UNA BIOS CACHE
 	LD	BC,$01FB		; UNA FUNC = SET BANK
 	LD	DE,(BNKBIOS)		; UBIOS_PAGE (SEE PAGES.INC)
@@ -1626,6 +1628,7 @@ LBA_IO:
 ;
 DSK_IO2:
 	PUSH	BC			; SAVE INCOMING FUNCTION, UNIT
+	RES	7,D			; CLEAR LBA BIT FOR UNA
 	LD	B,C			; UNIT TO B
 	LD	C,$41			; UNA SET LBA
 	RST	08			; CALL UNA
diff --git a/Source/ver.inc b/Source/ver.inc
index 99ad20a9..9124b396 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.175"
+#DEFINE BIOSVER	"3.1.1-pre.176"
diff --git a/Source/ver.lib b/Source/ver.lib
index 1d6dd68a..817ec6ea 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.175"
+	db	"3.1.1-pre.176"
 	endm