Compaq 4000N - Manual (Page 104)

Chapter 5 Input/Output Interfaces
Compaq Deskpro 4000N and 4000S Personal Computers
First Edition – September 1997
5-14
5.3.2 DISKETTE DRIVE CONNECTOR
This system uses a standard 34-pin connector (refer to Figure 5-2 and Table 5-8 for the pinout)
for diskette drives. Drive power is supplied through a separate connector.
Figure 5–2. 34-Pin Diskette Drive Connector.
Table 5–9. 34-Pin Diskette Drive Connector Pinout
Table 5-8.
34-Pin Diskette Drive Connector Pinout
Pin Signal Description Pin Signal Description
1 GND Ground 18 DIR- Drive head direction control
2 LOW DEN- Low density select 19 GND Ground
3 --- (KEY) 20 STEP- Drive head track step control
4 MEDIA ID- Media identification 21 GND Ground
5 GND Ground 22 WR DATA- Write data
6 DRV 4 SEL- Drive 4 select 23 GND Ground
7 GND Ground 24 WR ENABLE- Enable for WR DATA-
8 INDEX- Media index is detected 25 GND Ground
9 GND Ground 26 TRK 00- Heads at track 00 indicator
10 MTR 1 ON- Activates drive motor 27 GND Ground
11 GND Ground 28 WR PRTK- Media write protect status
12 DRV 2 SEL- Drive 2 select 29 GND Ground
13 GND Ground 30 RD DATA- Data and clock read off disk
14 DRV 1 SEL- Drive 1 select 31 GND Ground
15 GND Ground 32 SIDE SEL- Head select (side 0 or 1)
16 MTR 2 ON- Activates drive motor 33 GND Ground
17 GND Ground 34 DSK CHG- Drive door opened indicator
2 34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
1