IBM 560 - Manual (Page 34)

Diskette Drive Connector
The external diskette drive is connected through the diskette drive
connector, located on the left side of the computer. Figure 2-9
shows the pin assignments of the connector:
25
26
1
2
Figure 2-9. Diskette Drive Connector Pin Assignments
Pin Signal Type
1 GND Ground
2 DRATE1 Data Rate Select 1
3 VCC5B + 5V dc
4 – Reserved
5 GND Ground
6 – Reserved
7 GND Ground
8 − INDEX Index
9 – Reserved
10 – Reserved
11 − DRVSEL0 Drive Select 0
12 DRATE0 Data Rate Select 0
13 − MOTEN0 Motor Enable 0
14 – Reserved
15 − FDIR Direction In
16 − FSTEP Step
17 WRDATA Write Data
18 − FWREN Write Enable
19 GND Ground
20 − TRAK0 Track 0
21 – Reserved
22 − FWPROTECT Write Protect
23 RDDATA Read Data
24 − FSIDE1SEL Side 1 Select
25 – Reserved
26 − DISKCHG Disk Change
2-12 ThinkPad 560/560E System Board