From b82ff327cf9acbb64b9c388a27796b51bf7d2e3f Mon Sep 17 00:00:00 2001
From: Wayne Warthen <wwarthen@gmail.com>
Date: Sun, 26 Jun 2022 16:54:46 -0700
Subject: [PATCH] CBIOS Fixes for UNA

Development in the dev branch on CBIOS had broken basic UNA functionality.  These fixes seem to correct the problems.  A full regression test of UNA has **not** yet been performed.
---
 Source/CBIOS/cbios.asm | 3 +++
 Source/ver.inc         | 2 +-
 Source/ver.lib         | 2 +-
 3 files changed, 5 insertions(+), 2 deletions(-)

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