AT&T 3B2/300 Technical Reference Manual page 602

Appendix: CONNECTOR AND CABLING I N F O R M A T I O N - - - - - - - - - - - - - - - - -
34-PIN FLOPPY DISK CONNECTOR, JlO
PIN
DESCRIPTION FUNCTION
1
GROUND
GROUND
2 NOT USED
NC
3
GROUND GROUND
4 NOT USED NC
5 GROUND GROUND
6 NOT USED NC
7 GROUND GROUND
8 INDEX (FINDEX[O]) INPUT
9 GROUND GROUND
10 FLOPPY DRIVE SELECT O (FDSEL[O]) OUTPUT
11
GROUND GROUND
12 NOT USED NC
13
GROUND GROUND
14
NOT USED NC
15
GROUND GROUND
16
MOTOR ON (MON[O]) OUTPUT
17 GROUND GROUND
18 FLOPPY DIRECTION SELECT (FDIRC[O]) OUTPUT
19
GROUND GROUND
20 FLOPPY STEP (FSTEP[O]) OUTPUT
21 GROUND GROUND
22 WRITE DATA (FWDATA[O]) OUTPUT
23 GROUND GROUND
24 FLOPPY WRITE GA TE (FWGA TE[O]) OUTPUT
25 GROUND GROUND
26
FLOPPY TRACK O (FTRO[O]) INPUT
27 GROUND GROUND
28
FLOPPY WRITE PROTECT (FWRTPRT[O]) INPUT
29
GROUND
GROUND
30 READ DATA (FRDATA[O]) INPUT
31
GROUND
GROUND
32 FLOPPY SIDE SELECT (FSSEL[O]) OUTPUT
33 GROUND GROUND
34 FLOPPY READY (FRDY[O]) INPUT
LEGEND:
NC No Connection
B-20 TECHNICAL REFERENCE MANUAL