Path: utzoo!attcan!uunet!mcsun!ukc!icdoc!zmacv14
From: zmacv14@doc.ic.ac.uk (C P Brown)
Newsgroups: comp.sys.amiga.hardware
Subject: 3.5" external drive connector spec required
Message-ID: <1588@gould.doc.ic.ac.uk>
Date: 12 Feb 90 13:32:32 GMT
Sender: news@doc.ic.ac.uk
Reply-To: zmacv14@doc.ic.ac.uk (Phil Brown)
Organization: Imperial College Department of Computing
Lines: 52


I have a 1Mb 3.5" external drive from another computer which I would like to
use as an external on Amiga. However, the connector on the drive is called
an SA400 2x17 way IDC 'Shugart' and I have had problems making up a cable to
connect it.  This is the tech-spec that I have:

Pin	Purpose			Direction

1-33    (all odd pins) 		All 0 volts (ground)
 8	Index			IN
 10	Disk 1 select		OUT
 12	Disk 2 select		OUT
 16	Motor on signal		OUT
 18	Direction of step	OUT
 20	Step pulse		OUT
 22	Write data		OUT
 24	Write gate		OUT
 26	Track 00		IN
 28	Write protect		IN
 30	Read data		IN
 32	Side select		OUT

 And as you well know, this is the spec for the C= external connector:

 Pin	Name	Description

 1	RDY	Disk ready active low
 2	DKRD	Disk ready data active low
 3-7	GND	Ground
 8	MTRXD	Disk motor control active low
 9	SEL2B	Select drive 2 active low
 10	DRESB	Disk reset active low
 11	CHNG	Disk removed latched low
 12	+5	+5 VDC supply
 13	SIDEB	Select disk side 0=upper 1=lower
 14	WPRO	Disk write protected
 15	TKO	Drive head position over track 0 active low
 16	DKWE	Disk write enable active low
 17	DKWD	Disk write data active low
 18	STEPB	Step head pulse, low high
 19	DIRB	Select head direction 0=inner 1=outer
 20	SEL3B	Select drive 3 active low
 21	SEL1B	Select drive 1 active low
 22 	INDEX	Disk index pulse active low
 23	+12	+12 VDC supply

 Please can you help me make up a cable for this? I really would like to use
 it as an external drive (I have no other externals; it will be drive 1).

 Thanks in advance,

 Phil Brown