Diskette Drive Interface Connector; Diskette Drive Connector Pin Assignments - NEC SP B-Series Service And Reference Manual

Diskette Drive Interface Connector

The following table provides the pin assignments for the diskette drive interface
connector.
Pin Description
1 Ground
3 Ground
5 Key
7 Ground
9 Ground
11 Ground
13 Ground
15 Ground
17 No connect
19 Ground
21 Ground
23 Ground
25 Ground
27 No connect
29 Ground
31 Ground
33 Ground
B-8 Connector Pin Assignments

Diskette Drive Connector Pin Assignments

Pin Description
2 DENSEL
4 Reserved
6 FDEDIN
8 FDINDX# (Index)
10 FDM00# (Motor enable A)
12 No connect
14 FDDS0# (Drive select A)
16 No connect
18 FDDIR# (Stepper motor direction)
20 FDSTEP# (Step pulse)
22 FDWD# (Write data)
24 FDWE# (Write enable)
26 FDTRK0# (Track 0)
28 FDWPD# (Write protect)
30 FDRDATA# (Read data)
32 FDHEAD# (Side 1 select)
34 DSKCHG# (Diskette change)