Specifications

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Table 2-10. Keyboard Connector (J5)
J5 PIN SIGNAL NAME DIN PIN
1 Keyboard Clock 1
2 Keyboard Data 2
3 (no connection) 3
4 Ground 4
5 Keyboard power 5
6 Keyboard inhibit ---
7 (*) No connect
8 (*) No connect
9 (*) Same as W22-1
10 (*) Same as W22-2
(*) = No connector pins.
2.4.3 Parallel Printer Port
The board's serial/parallel controller option (U22) must be installed for this function to be
available. The parallel printer connector (J6) has a pinout that allows the use of flat ribbon cable
to a standard DB25S PC or AT rear panel printer connector. Table 2-11 gives the printer
connector's pinout and signal definitions.
The table also indicates the pin number on the AT compatible DB25 printer connector which
corresponds to each of the pins of the board's header connector. Note that the pin numbering
convention for the board's header connector differs from that of DB25 connectors, even though
direct connection with flat ribbon cable is possible. To clarify this, each signal's corresponding
DB25 connector pin number has been included in the table.
Note
Be sure not to exceed 10 feet of total cable length between the
board's connector and the printer. Beyond this distance, the
signal cannot be expected to be reliable due to the limitations
of the port's signal drivers.
The parallel printer port can be used either as a standard PC/AT printer port, or as a bidirectional
data bus. Refer to Chapter 4 for additional information.