Apple Macintosh External Floppy disk drive pinout

connector or cable wiring scheme

20 pin Apple HDI-20 connector
at the Apple computer, looking into cable-side connector

Pin	Name	Description
1	GND	Signal Ground
2	GND	Signal Ground
3	GND	Signal Ground
4	GND	Signal Ground
5	NC	No connection
6	+5V	+5 volts DC
7	+5V	+5 volts DC
8	+5V	+5 volts DC
9	+5V	+5 volts DC
10	NC	No connection
11	PH0	Phase 0: state control line
12	PH1	Phase 1: state control line
13	PH2	Phase 2: state control line
14	PH3	Phase 3: register write strobe
15	WREQ	Write request
16	HDSEL	Head select
17	ENBL2	External drive select
18	RD	Read data
19	WR	Write data
20	NC	No connection

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Pinouts.ru > Disk drives connectors pinouts listing > Pinout of Apple Macintosh External Floppy disk drive and layout of 20 pin Apple HDI-20 connector	Information:	should be correct
Source(s) of this and additional information: Apple "Ports and Pinouts", from Hardware Book	1 reports
Last updated at 2008-06-28 21:56:54. Edit this page.	Is this document correct or incorrect? What is your opinion?

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