diff --git a/Source/HBIOS/cfg_rcz80.asm b/Source/HBIOS/cfg_rcz80.asm
index 54340bb1..3a4f7ade 100644
--- a/Source/HBIOS/cfg_rcz80.asm
+++ b/Source/HBIOS/cfg_rcz80.asm
@@ -41,7 +41,7 @@ KIOBASE		.EQU	$80		; KIO BASE I/O ADDRESS
 ;
 CTCENABLE	.EQU	FALSE		; ENABLE ZILOG CTC SUPPORT
 CTCBASE		.EQU	$88		; CTC BASE I/O ADDRESS
-CTCTIMER	.EQU	TRUE		; ENABLE CTC PERIODIC TIMER
+CTCTIMER	.EQU	FALSE		; ENABLE CTC PERIODIC TIMER
 CTCMODE		.EQU	CTCMODE_RC	; CTC MODE: CTCMODE_[ZP|Z2|EZ|RC]
 ;
 DIAGENABLE	.EQU	TRUE		; ENABLES OUTPUT TO 8 BIT LED DIAGNOSTIC PORT
diff --git a/Source/ver.inc b/Source/ver.inc
index 2fc8980c..5f23cbdf 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.7"
+#DEFINE BIOSVER	"3.1-pre.8"
diff --git a/Source/ver.lib b/Source/ver.lib
index 575efc46..71115fb6 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.7"
+	db	"3.1-pre.8"
 	endm