Meinberg GPS167PC - Manual (Page 15)

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The upper part of the screen shows information about the resident driver (if the driver
has been installed). These information include the ID string of the resident driver
with the driver revision number, the number of the software interrupt used to
control the resident driver and the last recent date/time the driver has read from the
board. The number of the user interrupt is determined automatically when the resident
driver is installed. It is not affected by the hardware interrupt configured by jumpers.
The BUSY flag controls the driver´s right to access the board. If the flag is set to
OFF the driver is allowed to access the board, if it is ON, access is inhibited. This flag
can be changed from the command line using the utility DRV.EXE or by pressing the
key B in PCPSINFO. The flag DISP affects the resident driver´s feature displaying
the permanent date/time window on the screen (upper right corner in the screenshot
above). It can be altered using the utility DISP.EXE from the command line or by
pressing the key D. The flag Set RTC direct enables the driver to write directly to the
computer´s real time clock. This feature is required in some special environments
only; see the description of PCPSDRV.COM below. The Tick Counter counts the
times the driver has been activated by the computer´s periodic timer tick interrupt. If
this counter is down to zero, the computer´s system time is set and the counter is
reloaded to the Tick Reload value. The tick reload is derived from the update cycle
parameter given in the command line when PCPSDRV.COM is installed. The system
timer generates 18.2 interrupt per second, so the reload value in the figure above (182)
corresponds to an update cycle of 10 seconds.
The lower part of the screen gives information about the radio clock installed in the
computer: The Eprom´s ID string rsp. the type of the board, and the clock's serial
number and port base address, and the settings of the clock's serial ports. The serial
parameters can be set up by menu if the key F4 is being hit.
The field labeled Date/Time: displays the board´s current date and time. If the key
F3 is pressed the user can modify the board´s date and time, should the need arise. The
line Last Sync: shows the time last synchronization with the GPS satellites has been