floppy-disk-pinout.txt

Normal 34-pins connector

Pin     PC          Osborne     PS/2 P70
---     ----------  ----------  ----------
 1      GND         GND         GND
 2      ~HD SEL     GND         ~HD SEL
 3      GND         GND         +5V
 4      nc          GND         DRV TYPE
 5      GND         GND         GND
 6      nc          GND         +12V
 7      GND         GND         GND
 8      ~INDEX      ~INDEX      ~INDEX
 9      GND         GND         GND
10      ~MOTEA      ~DRV SEL 1  RESERVED
11      GND         +12V        GND
12      ~DRVSB      ~DRV SEL 2  ~DRV SEL
13      GND         +12V        GND
14      ~DRVSA      nc          RESERVED
15      GND         +12V        GND
16      ~MOTEB      4 MHz       ~MOTE
17      GND         +12V        GND
18      ~DIR        ~DIR        ~DIR
19      GND         GND         GND
20      ~STEP       ~STEP       ~STEP
21      GND         +5V         GND
22      ~WRT DATA   ~WRT DATA   ~WRT DATA
23      GND         +5V         GND
24      ~WRT GATE   ~WRT GATE   ~WRT GATE
25      GND         +5V         GND
26      ~TRK00      TRK00       ~TRK00
27      GND         GND         GND
28      ~WRT PROT   ~WRT PROT   ~WRT_PROT
29      GND         GND         GND
30      ~RD DATA    ~RD DATA    ~RD DATA
31      GND         GND         GND
32      ~SIDE SEL   ~SIDE SEL   ~SIDE SEL
33      GND         GND         GND
34      ~DISKCHG    ~LATE       ~DSKCHG