Path: utzoo!attcan!uunet!mcsun!ukc!servax0!sersun0.essex.ac.uk!zotog
From: zotog@sersun0.essex.ac.uk
Newsgroups: comp.sys.ibm.pc
Subject: Shugart floppy disk bus
Message-ID: <3257@servax0.essex.ac.uk>
Date: 27 Feb 90 11:35:04 GMT
Sender: news@servax0.essex.ac.uk
Reply-To: zotog@sersun0.essex.ac.uk
Organization: University of Essex, Colchester, UK
Lines: 31



To any body interested here are the pin assignment for a standard 34-way floppy
disk bus. (Taken from a Computer Engineer's pocket book )




	this		1||2  not connected, reserved, or 0V
	side		3||4  IN USE or HEAD LOAD, NOT(HLD)
			 ==   NOTCH
			5||6  DRIVE SELECT 4, NOT(DS4)
			7||8  INDEX, NOT(IP)
			9||10 DRIVE SELECT 1, NOT(DS1)
	GND	       11||12 DRIVE SELECT 2, NOT(DS2)
		       13||14 DRIVE SELECT 3, NOT(DS3)
	or	       15||16 MOTOR ON, NOT(MOTOR)
		       17||18 DIRECTION SELECT, DIRC
		       19||20 STEP, STEP
	0V	       21||22 WRITE DATA, WD
		       23||24 WRITE GATE, WG
		       25||26 TRACK 00, NOT(TR00)
		       27||28 WRITE PROTECTED, NOT(WPRT)
		       29||30 READ DATA, RDATA
		       31||32 SIDE SELECT, SIDE
		       33||34 READY, NOT(RDY)



If any one is interested I could send more info abouteach pin.
By the way the above pin out applies and to the 3.5 drives with 34 pin connector.