182
Appendix A: Cable Pinout Assignments
Parallel Port
Table A-3 shows the cable pinout assignments for the parallel port.
Table A-2
Macintosh SE Compatible Pin Assignments (RS-422)
Pin
Assignment
Description
1
HSKo
Output Handshake
2
HSKi
Input Handshake Or External Clock
3
TxD–
Transmit Data –
4
GND
Signal Ground
5
RxD–
Receive Data –
6
TxD+
Transmit Data +
7
GPi
General Purpose Input
8
RxD+
Receive Data +
Table A-3
Parallel Port (25-pin DSUB Connector)
Pin
Assignment
1
STROBE
2
DATA(0)
3
DATA(1)
4
DATA(2)
5
DATA(3)
6
DATA(4)
7
DATA(5)
8
DATA(6)
9
DATA(7)
1
2
5
8
7
6
3
4
Figure A-2
Serial Port
Pinout Assignments
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Figure A-3
Parallel Port
Pinout Assignments
