diff --git a/unicos_ramfs.cfg b/unicos_ramfs.cfg
index b7044a0..afb462b 100644
--- a/unicos_ramfs.cfg
+++ b/unicos_ramfs.cfg
@@ -33,7 +33,9 @@ SysCallTableEnd          0x000C5A57
 ProcTableBase            0x000357B7
 ProcTableLength          650                  ; NPROC from config.h
 
-RealTimeClockIncrement   10                   ; By how much should the real time clock increment for every instruction burst
+CpuClockPeriod           10                   ; Clock period in ns.
+;UseHostRealTimeClock     false
+RealTimeClockIncrement   90                   ; By how much should the real time clock increment for every instruction burst
 
 OsType                   UNICOS               ; Controls how syscalls are decoded for the logger
 
@@ -115,13 +117,6 @@ IopClusters {
 				ImageFileName               dump.img
 				DeviceType                  DD_U
 			}
-			inst {
-				PysicalDeviceId             023
-				IopNumber                   0
-				Unit                        0
-				ImageFileName               install.img
-				DeviceType                  DD_U
-			}
 			root {
 				PysicalDeviceId             024
 				IopNumber                   0