[comp.sys.atari.st] DI DRIVES

42_145@uwovax.uwo.ca (RIC WHEELER) (09/24/88)

		I use three IBM type drives on my Atari STFM
	Two 3 1/2" and one 5 1/4" for PC DITTO.Drive zero plugs
	directly into an extended cable from inside my ST,using
	a standard 34 pin edge connector.For drive 1 I made
	a cable from that funny round connector to a 34 pin
	edge connector.(no,all the pins aren't used)
	The drives are powered with an old IBM power supply
	which I obtained when a friend upgraded his system to
	a heaftier power supply.When using these drives you will
	have to remove the terminating resistor pack and
	probobly also have to remove the terminating resistor
	for the drive select li (150 ohm).
		The pinouts for the atari connector are as
	follows

		ATARI-----1--read data-------------30------34 pin conn.
			  2--side 0 select---------32
			  3--logic ground----------any odd number
			  4--index pulse-----------8
			  5--drive 0 select--------10
			  6--drive 1 select--------12
			  7--logic ground----------any odd number
			  8--motor on--------------16
			  9--direction in----------18
			 10--step------------------20
			 11--write data------------22
			 12--write gate------------24
			 13--track 0---------------26
			 14--write protect---------28

	If you have a technician-type friend he should be able to
	help you with this.


	As far as gluing the head back on your drive.what have you
	got to loose?It's no good like it is and it would be too
	expensive to get the heads replaced.Give it a t and just
	pray that you don't get it out of alignment.

	I,personally,would scrap it. But you might be lucky.


				Good luck

				  RIC