Meinberg GPS167PC, Руководство по эксплуатации

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18
Controlling the Resident Driver
If the resident driver PCPSDRV.COM has been installed, some of the utility pro-
grams can be used to control the way it works. The programs described below show a
few help lines when they are called without command line parameters.
DRV.EXE
temporarily disables the resident driver´s access to the board.
Command: DRV ON or DRV OFF
Default: enabled
DISP.EXE
enables or disables the date/time window on the screen.
Command: DISP ON or DISP OFF
Default: disabled
COLOR.EXE sets up the screen attribute of the date/time window
Command: COLOR fg bg
with fg and bg the color numbers of the foreground/back-
ground
Default: white characters on black
POSXY.EXE
sets up the screen position of the date/time window.
Command: POSXY column row
Default: upper right corner of the screen
Using these utilities, you can enable or disable the date/time window only when
special applications are run.
Firmware Updates
Whenever the on-board software must be upgraded or modified, the new firmware can
be downloaded to the internal flash memory via the radio clock's serial port COM0.
There is no need to open the computer case and insert a new EPROM.
If the button behind a hole in the rear slot cover is pressed for approximately 2
seconds, a bootstrap loader is activated and waits for instructions from the serial port
COM0. A loader program shipped together with the file containing the image of the
new firmware sends the new firmware from one of the computer's serial ports to the
clock's serial port COM0. The bootstrap loader does not depend on the contents of the
flash memory, so if the update procedure is interrupted, it can easily be repeated.
The contents of the program memory will not be modified until the loader program
has sent the command to erase the flash memory. So if the button has been pressed
accidentally, the system will be ready to operate again after the computer has been
turned off an the on again.