Technical Specifications
C-4 AlphaStation 500 Series User Information
Parallel Port Connector
The parallel port connector provides an interface to a printer or other parallel devices.
Table C-5 lists pin assignments. An asterisk (*) after a signal name indicates an active low
signal.
Table C-5 Parallel Port Pinouts
DB25 Pin
Signal
Function
1
STB-R*
Strobe
2
PRTD0
Printer data bit 0
3
PRTD1
Printer data bit 1
4
PRTD2
Printer data bit 2
5
PRTD3
Printer data bit 3
6
PRTD4
Printer data bit 4
7
PRTD5
Printer data bit 5
8
PRTD6
Printer data bit 6
9
PRTD7
Printer data bit 7
10
ACK*
Acknowledge
11
BUSY
Busy
12
PE
Paper end
13
SLCT
Select
14
AUTOFDXT*
Autofeed
15
ERR*
Error
16
INIT*
Initialize printer
17
SLCTIN*
Select input
18 to 25
GND
Ground
