Centronics Printer Interface
OPTIONAL PRINTER CABLE PINOUT
Table 9-5 below defines the pinout for the ZT 90039 printer port
cable, including the frontplane connector J6 pin definitions and the
corresponding pin on the ZT 90039 25-pin D-type connector, which is
identical to the IBM 25-pin D-type connector pinout.
Note: An alternative cable, the ZT 90074, should be used if the
shared signals are needed by the printer. The pinout is identical except
all signals are connected.
Table 9-5
ZT 90039 Cable Pinout.
Signal Name
Mnemonic
Connector J6
25-Pin Connector
Pin #
Pin #
Strobe
STB*
1
1
Autofeed
AFD*
2
14(B)
Parallel Data 0
PD0
3
2
Error
ERROR*
4
15(B)
Parallel Data 1
PD1
5
3
Initialize
INIT*
6
16(B)
Parallel Data 2
PD2
7
4
Select In
SLIN*
8
17(B)
Parallel Data 3
PD3
9
5
Printer OE
LPTOE*
10
18(A)
Parallel Data 4
PD4
11
6
Ground
GND
12
19(A)
Parallel Data 5
PD5
13
7
Ground
GND
14
20 - 25(A)
Parallel Data 6
PD6
15
8
Busy
BUSY
16
11
Parallel Data 7
PD7
17
9
Paper Empty
PE
18
12
Acknowledge
ACK*
19
10
Prtr Selected
SLCT
20
13
Notes:
(A)
The ZT 90039 cable ties together pins 18-25 of the 25-pin D-type connector, which is
common with ground on the ZT 8809A.
(B)
Pins 14-17 of the 25-pin D connector are open to make these signals available for
ZT 8809A uses. The wires leading to those pins are insulated and remain within the D
connector backshell.
9-14