Printronix P8000 Plus Series Administrator's Manual page 81

Busy On Strobe
•
Enable (factory default). Asserts a busy signal after each character is received.
•
Disable. Asserts a busy signal only when the print buffers are full.
Latch Data On
Specifies whether the data is read on the leading or trailing edge of the data strobe signal. The default is
leading.
Prime Signal
•
Enable (factory default). The parallel port will perform a warm start (reboot) if the host asserts the
prime signal.
•
Disable. The parallel port will not perform a warm start (reboot) if the host asserts the prime signal.
TOF Action
•
Reset (factory default). A form feed is performed before a warm start when the prime signal is
asserted from the host. This setting is used only if the prime signal parameter is enabled.
•
Do Nothing. Nothing occurs before a warm start when the prime signal is asserted from the host.
Buffer Size in K
Configures the amount of memory allocated for the Centronics parallel port buffer. You can specify
between 1 and 16 Kbytes, in 1-Kbyte increments. The default is 16K.
NOTE: H-Series and OpenPrint HD products have a range of 1 to 256 and a default of 64K.
Auto Trickle
Auto Trickle is used to prevent a host computer from timing out because the parallel interface was busy
for too long. When Auto Trickle is enabled and the printer's buffers are almost full, the printer will begin to
trickle data in (at the rate set in the Trickle Time menu) until the buffers start to empty out.
Trickle Time
When the printer is printing data from a host and a second job is received by the printer from a different
host, Trickle Time prevents the second host from timing out while it is waiting for its data to be printed. In
order to support this feature, the port has to be able to accept data from the host and store it for future
use.
For example, if the printer is printing a job from the serial port, and then receives a second print job from
the parallel or USB port, the data from the parallel or USB port will "trickle" bit by bit into the printer buffer
to prevent a timeout error from being sent back to the host connected to the parallel port.
The selected value is the time that the printer waits before getting the next byte of data from the host. The
Trickle Time value should be less than the host time out value, but not too much shorter or else the
printer fills up its buffer too fast.
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