diff --git a/Source/Apps/Assign.asm b/Source/Apps/Assign.asm
index 0bbf038e..86498fb8 100644
--- a/Source/Apps/Assign.asm
+++ b/Source/Apps/Assign.asm
@@ -42,7 +42,7 @@ bdos	.equ	$0005		; BDOS invocation vector
 stamp	.equ	$40		; loc of RomWBW CBIOS zero page stamp
 ;
 rmj	.equ	3		; CBIOS version - major
-rmn	.equ	1		; CBIOS version - minor
+rmn	.equ	0		; CBIOS version - minor
 ;
 ;===============================================================================
 ; Code Section
diff --git a/Source/Apps/Mode.asm b/Source/Apps/Mode.asm
index 08f00ba7..957bba69 100644
--- a/Source/Apps/Mode.asm
+++ b/Source/Apps/Mode.asm
@@ -49,7 +49,7 @@ bdos	.equ	$0005		; BDOS invocation vector
 ident	.equ	$FFFE		; loc of RomWBW HBIOS ident ptr
 ;
 rmj	.equ	3		; intended CBIOS version - major
-rmn	.equ	1		; intended CBIOS version - minor
+rmn	.equ	0		; intended CBIOS version - minor
 ;
 bf_cioinit	.equ	$04	; HBIOS: CIOINIT function
 bf_cioquery	.equ	$05	; HBIOS: CIOQUERY function
diff --git a/Source/Apps/Timer.asm b/Source/Apps/Timer.asm
index 0d049a06..867f2e24 100644
--- a/Source/Apps/Timer.asm
+++ b/Source/Apps/Timer.asm
@@ -37,7 +37,7 @@ bdos	.equ	$0005		; BDOS invocation vector
 ident	.equ	$FFFE		; loc of RomWBW HBIOS ident ptr
 ;
 rmj	.equ	3		; intended CBIOS version - major
-rmn	.equ	1		; intended CBIOS version - minor
+rmn	.equ	0		; intended CBIOS version - minor
 ;
 bf_sysver	.equ	$F1	; BIOS: VER function
 bf_sysget	.equ	$F8	; HBIOS: SYSGET function
diff --git a/Source/Apps/Tune/Tune.asm b/Source/Apps/Tune/Tune.asm
index 046b83ac..73fe5b0e 100644
--- a/Source/Apps/Tune/Tune.asm
+++ b/Source/Apps/Tune/Tune.asm
@@ -55,7 +55,7 @@ BDOS		.EQU	$0005		; BDOS invocation vector
 IDENT		.EQU	$FFFE		; loc of RomWBW HBIOS ident ptr
 ;	
 RMJ		.EQU	3		; intended CBIOS version - major
-RMN		.EQU	1		; intended CBIOS version - minor
+RMN		.EQU	0		; intended CBIOS version - minor
 ;
 BF_SYSVER	.EQU	$F1		; BIOS: VER function
 BF_SYSGET	.EQU	$F8		; HBIOS: SYSGET function