Centronics Printer Interface
3.
Finally, modify the ZT 90039 printer cable. If you are using
STD DOS, all four signals (AFD*, ERROR*, INIT*, and
SLIN*) must be soldered to pins 14 through 17 in the 25-pin
D-type connector. You may also order an alternative cable, the
ZT 90074.
It connects all four signals within the D-type
connector’s backshell.
If you are using a non-STD DOS system, a subset of these four
signals may be soldered, depending on the jumper selections
made for W37, W39, W13, and W46, respectively.
To prepare for soldering, first remove the shrink tubing at the
ends of the wires, which may be found inside the connector’s
backshell. Refer to Table 9-4 for appropriate signal routing,
keeping in mind that pin 1 of the ribbon cable is indicated by the
stripe on the outermost edge.
Table 9-4
Shared Printer Signals.
Signal Name
Ribbon Cable
25-pin D-type
Mnemonic
Pin No.
Connector Pin No.
AFD*
2
14
ERROR*
4
15
INIT*
6
16
SLIN*
8
17
9-13