diff --git a/Source/Clean.cmd b/Source/Clean.cmd
index c878314b..ec661f7c 100644
--- a/Source/Clean.cmd
+++ b/Source/Clean.cmd
@@ -26,3 +26,4 @@ pushd Doc && call Clean & popd
 pushd ZRC && call Clean & popd
 pushd Z1RCC && call Clean & popd
 pushd ZZRCC && call Clean & popd
+pushd MSX && call Clean & popd
diff --git a/Source/HBIOS/Layout.txt b/Source/HBIOS/Layout.txt
index 31923acf..8e175977 100644
--- a/Source/HBIOS/Layout.txt
+++ b/Source/HBIOS/Layout.txt
@@ -38,7 +38,8 @@ ROM2 [32K] -> rom2.bin
   netboot     [4.00K]
   updater.bin [3.25K]
   sysconf.bin [2.00K]
-  usrrom.bin  [3.75K]
+  usrrom.bin  [0.50K]
+  slack       [3.25K]
 
 ROM3 [32K] -> rom3.bin
   hwmon       [ 8.00K]
diff --git a/Source/ver.inc b/Source/ver.inc
index 07fe77c4..2c228194 100644
--- a/Source/ver.inc
+++ b/Source/ver.inc
@@ -2,7 +2,7 @@
 #DEFINE	RMN	6
 #DEFINE	RUP	0
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"3.6.0-dev.29"
+#DEFINE BIOSVER	"3.6.0-dev.30"
 #define rmj	RMJ
 #define rmn	RMN
 #define rup	RUP
diff --git a/Source/ver.lib b/Source/ver.lib
index 315b0d9f..72bdf3ed 100644
--- a/Source/ver.lib
+++ b/Source/ver.lib
@@ -3,5 +3,5 @@ rmn	equ	6
 rup	equ	0
 rtp	equ	0
 biosver	macro
-	db	"3.6.0-dev.29"
+	db	"3.6.0-dev.30"
 	endm