Compaq 850 manual Pin Diskette Drive Connector Pinout

Technical Reference Guide

5.3.2 DISKETTE DRIVE CONNECTOR

This system uses a standard 34-pin connector (refer to Figure 5-2 and Table 5-6 for the pinout) for diskette drives. Drive power is supplied through a separate connector.

2	4	6	8	10	12	14	16	18	20	22	24	26	28	30	32	34
1		5	7	9	11	13	15	17	19	21	23	25	27	29	31	33

Figure 5-2.34-Pin Diskette Drive Connector.

Table 5–6.34-Pin Diskette Drive Connector Pinout

Table 5-6.

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	Drive 4 select	23	GND	Ground
	SEL-
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	Drive 2 select	29	GND	Ground
	SEL-
13	GND	Ground	30	RD DATA-	Data and clock read off disk
14	DRV 1	Drive 1 select	31	GND	Ground
	SEL-
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

Compaq Deskpro EXS and Workstation 300 Personal Computers 5-7

Featuring the Intel Pentium 4 Processor

First Edition - December 2000