Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!dino!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!m.cs.uiuc.edu!totty
From: totty@m.cs.uiuc.edu
Newsgroups: comp.sys.atari.st
Subject: Re: Hard Drive
Message-ID: <7500014@m.cs.uiuc.edu>
Date: 7 Feb 90 17:34:05 GMT
Lines: 28
Nf-ID: #R:<9001310813.AA11452@ucbvax.Berke:-40:m.cs.uiuc.edu:7500014:000:1054
Nf-From: m.cs.uiuc.edu!totty    Feb  7 00:55:00 1990



	What exactly does the host adapter need to do?  How similar
	are the protocols between the Atari DMA interface and a standard
	disk controller?  How about between DMA and SCSI controllers?

	In particular, with a priority on fun rather than saving money,
	what would be involved in actually building one of these interfaces?
	Would it be a simple FSM protocol converter with some buffering or
	are there more complicated things necessary?

	Also, where can I get technical information on controller details
	and the Atari DMA port?

	Finally, I got mail from one person who said he built a simple
	host adapter and offerred me schamatics.  I wasn't able to get my
	reply back to him.  If he reads this, I would be interested in
	any technical info/schematics!

						Thanks,


						--- Bri

   /                      Brian Totty              o o
  /__  __  o        406 E. Michigan / Apt. 6        o  
 /  / /   /             Urbana, IL 61801           \_/  "We have corn in
/__/ /   /             totty@cs.uiuc.edu                Massachusetts too!"