Printronix P7000 Cartridge Ribbon Printer - Manual (Page 275)

Terminating Resistor Configurations
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nData Available / nPeripheral Request. Driven by the printer. Indicates the
printer has encountered an error. (Data bits 1 and 5 in Nibble mode.)
1284 Active / nAStrobe. Driven by the host. A peripheral device is selected.
Host Logic High —Driven by the host. When set to high, the host indicates all
of its signals are in a valid state. When set to low, the host indicates its power
is off or its signals are in an invalid state.
nInit —Resets init interface from the host.
Terminating Resistor Configurations
V6 Controller Board
For parallel interface configurations, the printer is equipped with 470 Ohm and
and 1K Ohm terminating reistors on the controller board. These are suitable
for most applications. See Figure 23.
If the standard terminating resistor pack is not compatible with the particular
interface driver requirements of the host computer, other RP1 and RP2 values
may be required. 220 Ohm and 330 Ohm alternate terminating resistors are
provided with the printer. If you install the 220 Ohm resistor, you must also
install the 330 Ohm resistor. Possible terminating resistor combinations are
shown below.
Configuration RP1 RP2
Factory Default 470 Ohm 1K Ohm
Alternate 220 Ohm 330 Ohm