diff --git a/display.py b/display.py
index 7aa4352..4dd7a60 100644
--- a/display.py
+++ b/display.py
@@ -29,6 +29,8 @@ TOUCH_MODE = 0x51
 SAVE_ATTRS = 0xa0
 SEL_ATTRS = 0xc0
 
+SET_STARTUP = 0xf2
+
 IDENT = 0xf3
 
 FONT_GEO = [(6, 8), (8, 16), (20, 40)]
@@ -47,45 +49,62 @@ class Display:
     fg = 15
     bg = 0
     touch = 0
-    thread = None
     bar = None
-    blinkchar = ' '
+    blink = False
     menu = None
+    storage = None
 
-    def __init__(self, dev='/dev/ttyS1', timeout=0.5):
+    def __init__(self, dev, timeout=0.5, daemon=False):
         self.event = threading.Event()
         self.term = serial.Serial(dev, baudrate=115200, timeout=timeout)
+        if not daemon:
+            self.storage = bytearray()
         self.gethost(False)
         self.reset()
+        if daemon:
+            threading.Thread(target=self.gethostthread, daemon=True).start()
+            self.event.wait(1)  # wait for thread to be started
+            self.refresh()
 
     def reset(self):
         self.send(MODE_GRAPH)
         self.font(2)
         self.send(CLEAR, self.bg)
 
-    def start(self):
-        if self.thread is None or not self.thread.is_alive():
-            self.thread = threading.Thread(target=self.gethostthread)
-            self.thread.daemon = True
-            self.thread.start()
-            self.event.wait(1)  # wait for thread to be started
-            print('refresh')
-            self.refresh()
-
     def color(self, fg=15, bg=0):
         self.fg = fg
         self.bg = bg
+        self.send(SET_COLOR, bg, bg, fg, fg)
 
     def send(self, code, *args):
-        out = [code]
+        out = bytearray([code])
         for arg in args:
-            if isinstance(arg, bytes):
-                out.extend(list(arg))
-            elif isinstance(arg, str):
-                out.append(arg.encode('latin-1'))
+            if isinstance(arg, str):
+                out.extend(arg.encode('latin-1'))
+            elif hasattr(arg, '__len__'):
+                out.extend(arg)
             else:
                 out.append(arg)
-        self.term.write(bytes([ESC,ESC,len(out)] + out))
+        cmd = bytearray([ESC,ESC,len(out)]) + out
+        if self.storage is not None:
+            self.storage.extend(cmd)
+        self.term.write(cmd)
+
+    def set_startup(self):
+        if self.storage is None:
+            print('storage off')
+            return
+        data = self.storage
+        self.storage = None
+        self.send(SET_STARTUP, data)
+
+    def standard_startup(self):
+        self.storage = bytearray()
+        self.reset()
+        with open('/sys/class/net/enp1s0/address') as f:
+            netaddr = f.read().strip().lower()
+        self.show('startup ...', netaddr)
+        self.set_startup()
 
     def version(self):
         self.term.write(bytes([ESC,ESC,1,0xf3]))
@@ -100,7 +119,7 @@ class Display:
         self.nrows = HEIGHT // self.rowhei
         self.ncols = WIDTH // self.colwid
         self.textbuffer = [" " * self.ncols] * self.nrows
-        self.send(SET_COLOR, self.bg, self.bg, self.fg, self.fg)
+        self.color()
 
     def text(self, text, row=0, left=0, right=None, font=2):
         if font != self.fontsize:
@@ -132,10 +151,13 @@ class Display:
             self.hostip = s.getsockname()[0]
         except Exception as e:
             self.hostip = ''
+        hostname = None
         if self.hostip and truehostname:
-            self.hostname = socket.gethostbyaddr(self.hostip)[0]
-        else:
-            self.hostname = socket.gethostname()
+            try:
+                hostname = socket.gethostbyaddr(self.hostip)[0]
+            except Exception:
+                pass
+        self.hostname = hostname or socket.gethostname()
 
     def gethostthread(self):
         self.gethost(True)
@@ -208,11 +230,17 @@ class Display:
 
     def net_display(self, x):
         if x is None:
-            hostip = self.hostip or 'no network.'
-            self.text(hostip.replace('.', self.blinkchar, 1), 0, 0, 15)
+            hostip = self.hostip or 'no network'
+            dotpos = hostip.find('.')
+            if dotpos < 0:
+               dotpos = len(hostip)
+            self.text(hostip.replace('.', ' ', 1), 0, 0, 15)
+            self.send(SET_COLOR, 0, 0, 0, 11 + self.blink)  # yellow / blue
+            self.text('.', 0, dotpos, dotpos+1)
+            self.color()
             self.text(self.hostname, 1)
             self.event.set()
-            self.blinkchar = ' ' if self.blinkchar == '.' else '.'
+            self.blink = not self.blink
         else:
             self.menu = self.menu_main
             self.show('(cancel)(reboot)(shdown)')
@@ -225,10 +253,17 @@ class Display:
         self.send(0xf0, 0xcb, 0xef, 0x20, 0x18)
 
 
-d = Display()
+tty = '/dev/ttyS1'
+daemon = False
 
-if len(sys.argv) == 1:
-    d.start()
+for arg in sys.argv[1:]:
+    if arg == '-d':
+        daemon = True
+    else:
+        tty = arg
+
+d = Display(tty, daemon=daemon)
+if daemon:
     while True:
         d.refresh()
 
diff --git a/install.py b/install.py
index 99c056a..7e06ab6 100755
--- a/install.py
+++ b/install.py
@@ -85,7 +85,7 @@ After = network.target
 
 [Service]
 User = root
-ExecStart = /usr/bin/python3 /root/aputools/display.py
+ExecStart = /usr/bin/python3 /root/aputools/display.py -d
 
 [Install]
 WantedBy = multi-user.target