move stop of tty service to startup script
diff --git a/bin/hconsole b/bin/hconsole
index 7fec020..a94d4cd 100755
--- a/bin/hconsole
+++ b/bin/hconsole
@@ -2,6 +2,5 @@
 
 echo "Ctrl-a :quit to exit console.  [Enter] to continue"
 read a
-systemctl stop serial-getty@ttyS0   
 screen /dev/ttyS3 115200
 
diff --git a/bin/startup_hacks.sh b/bin/startup_hacks.sh
new file mode 100755
index 0000000..18582ae
--- /dev/null
+++ b/bin/startup_hacks.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+systemctl stop serial-getty@ttyS0
+