IBM 6500 User Manual page 145

TOF Act at Prime Signal
TOF (Top-of-Form) ACTION AT PRIME SIGNAL determines whether or not a form
feed is performed before a warm start when the prime signal is asserted from the
host. This setting is only used if PRIME SIGNAL parameter is enabled.
v Form Feed at Reset (the default)
v No Form Feed at Reset
Buffer Size in Kbytes
This parameter determines the size of the input buffer, in 1K increments.
v 16K (the default)
v 1 - 16K
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 enable 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. If the value is
too short, the printer fills up its buffer too fast.
Trickle Time
The functionality prevents an attached host from timing out. To support his
feature, the port has to be able to accept data from the host and store it for future
use. The selected value is the time that the printer waits before getting the next
byte of data from the host. Set the value to be less than the host time-out value. If
the value is too much shorter, the printer fills up its buffer too fast.
v ¼ Sec (the default)
v ½ Sec
v 1 Sec
v 2 Sec
v 4 Sec
v 8 Sec
v OFF
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Chapter 4. The Configuration Menus