
       ͻ
        Device driver for GUDE Expert Mouse CLOCK USB 
       ͼ

*** PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE INSTALLATION ***

This package contains the USB driver for the  GUDE  Expert Mouse CLOCK
USB device.  It replaces the "zeit.sys" driver of the DCF77 package of
nb-software. USBDCF supports up to 8 devices. The most reliable one is
used as time source. If this device detects an error, the driver auto-
matically switches to another device with correct time.

In general this driver works autonomically. However it is recommended
to  also  install the  dcf77 package of nb-software, as it contains a
WPS clock supporting an easy setup and control of the driver.


     Installation
     ============

Edit your "config.sys" by adding the following line:

DEVICE=<path>\usbdcf.sys [/INTV:n] [/NUM:n] [/DEV:driver] [/OFFS:n] [/Q] [/R:n] [/THR:n] [/UTC]

Options:
       /INTV:n     : Set intervall in seconds (0...65535)      (Default: 60)
       /NUM:n      : Maximum number of devices (0...8)         (Default: 8)
       /DEV:driver : Driver name                               (Default: USBDCF$)
       /OFFS:n     : Time offset in hours (-12...12)           (Default: 0)
       /Q          : No output during system start
       /R:n        : Number of minutes for check (0...9)       (Default: 2)
       /THR:n      : 0/1-threshold in ms (50...250)            (Default: 160)
       /UTC        : Use UTC instead of CET

Additionally the following drivers are also necessary to form a complete
USB stack (x is one of O, U, E, depending on your hardware):

BASEDEV=USBxHCD.SYS
BASEDEV=USBD.SYS /REQ:USBxHCD$
DEVICE=<path>\USBDCF.SYS <parms>


     The Parameters of the USBDCF driver Ver.1.20
     ============================================

With this driver, the following options may be used:

  Parameter
           Description
----------------------------------------------------------------------
        -INTV:xx
           Defines, how often the real time clock of your PC will
           be set. So with -I60, the hardware clock will be set
           once per hour.

        -OFFS:x
           In some countries it is possible to receive the signal
           broadcasted in Frankfurt. However another local time may
           be used there, differing from CET in Germany. This may be
           taken into account by adding an offset. For example
           "-O:-1" subtracts 1 hour from CET (London time), "-O:2"
           adds 2 hours (Moscow time).

        -NUM:x
           Defines, how much GUDE USB devices will be supported.
           The default value is 8.

        -DEV:driver
           This parameter overrides the standard driver name "USBDCF$".
           It is normally useful only for debugging purposes. Do not
           change the driver name, if you are using the dcf77 package,
           as it expects the default name.

        -UTC
           This parameter switches off daylight saving time switching.
           Whithout the "-O" parameter, the PC is then using UTC.

        -THR:x
           The transmission protocol uses a 100ms gap for "0" and 200ms
           for "1". Theoretically the optimum threshold is at about
           150ms. Depending on the receiver, this optimum may deviate
           from this value.

        -R:x
           A check of the received time is primarily done by parity
           bits present in the received bit-stream. His kind of
           check, however is not very reliable and fails at burst
           errors. This parameter offers a plausibility check which
           expects that consecutive minutes only differ by a
           value of 1

        -Q
           This parameter suppresses the copyright note on driver
           startup.


     General
     =======

This driver has been created by  nb-noftware.  If you  experience  any
problems,  have  questions or  suggestions,  feel  free to  contact us
through the following address:
                Ŀ
                 noller & breining software  ÿ
                 Lauffener Str. 4            
                 71522 Backnang              
                                             
                 Tel.:  07191/960345         
                 email: info@nbsoftware.de   
                ٳ
                 

