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From: candym@calgary.UUCP
Newsgroups: comp.sys.amiga
Subject: Request for hard disk driver info
Message-ID: <767@vaxb.calgary.UUCP>
Date: Mon, 26-Jan-87 12:52:24 EST
Article-I.D.: vaxb.767
Posted: Mon Jan 26 12:52:24 1987
Date-Received: Thu, 29-Jan-87 04:28:48 EST
Organization: U. of Calgary, Calgary, Ab.
Lines: 44
Keywords: hard disk driver


I have recently obtained an SCSI hard drive sub-system for a very
good price that I'd like to use on my Amiga. The system came with a
host adapter for a Motorola EXORciser bus, which I have succesfully
adapted to the expansion port. (No auto-configure)
Success being determined by:
	i)  writing a small test program that accesses the registers of
	    the host adapter causing the heads to step. (interrupts disabled)
	ii) observing expected signals on the bus.
	iii)the heads step.
	iv) the status registers contain valid values.

I now need to write (or obtain) a driver. After reading the appropriate
sections of the RKM, I still don't know how to go about this. I'm
currently running under 1.2, and can create the appropriate entry in
DEVS:Mountlist, with DEVICE = L:harddisk.device. The questions are what
parameters does it get passed and what in skeleton form does it need to do?

You still can't purchase an official enhancer (V1.2) package around here,
so any information contained in that documentation is not available to me
at the moment. Is there any pertinent information in the enhancer
package?

I have looked at the skeleton handler provided by Phillip Lindsay posted
mid Oct. 86. Though this is not what I require it was a starting point.
The executable worked as advertised, however when I tried to recreate
the executable from the given source it hangs in WaitPort() waiting
for the initial startup message. All the passed parameters look
reasonable to me. I'm using Lattice 3.10 and did have stack checking 
disabled. Did any one get this example to work? Were there any follow
up articles with corrections? Is any one at Commodore planning to post
a similar article for device drivers?

Thanks to any and all for any info.
Mike
____________________________________________________________________________
						Mike Candy
UUCP:	..!{ubc-vision,ihnp4}!alberta!calgary!candym
BIX:	mrcandy		(not checked very often)
-- 
____________________________________________________________________________
						Mike Candy
UUCP:	..!{ubc-vision,ihnp4}!alberta!calgary!candym
BIX:	mrcandy		(not checked very often)