IBM PS/2 35 SX Hardware Maintenance Reference page 17

IBM PS/2 Model 35 SX, 35 LS, 35 SLC HMR
Diskette-Drive Controller
1.2.7 Diskette-Drive Controller
The controller connects to the diskette drive(s) through a single 40-pin
connector on the system board. Signals and voltages are supplied through
the diskette-drive cable that plugs into the connector.
¦ Copyright IBM Corp. 1991, 1992
1.2.7 - 1