Subject: Re: ISA Adaptec SCSI 1542CF problems on '486
To: Tom Trebisky <tom@kofa.as.arizona.edu>
From: Jason Thorpe <thorpej@nas.nasa.gov>
List: netbsd-help
Date: 10/03/1997 14:26:14
On Fri, 3 Oct 1997 09:44:48 -0700 (MST) 
 Tom Trebisky <tom@kofa.as.arizona.edu> wrote:

 > Now I get lots of errors, including the following messages:
 > 	
 > 	aha0: DMA beyond end of ISA
 > 	aha0: BAD CCB ADDR!
 > 	aha0: timed out AGAIN!
 > 	aha0: .... (and so on)
 > 
 > Did I forget to mention that I have 64M of ram and I am running netBSD 1.1 ?
 > 
 > The QUESTION is:
 > 
 > Does NetBSD 1.2 or beyond have a fix for the 16M isa limit of this kind
 > of hardware??  Thanks to anyone with info willing to take the time to help!

Yes, I implemented generic bounce buffers as part of my bus_dma framework,
which is in NetBSD-current.  I would heartily encourage you to pick up
the latest i386 binary snapshot, and give it a whirl.

Jason R. Thorpe                                       thorpej@nas.nasa.gov
NASA Ames Research Center                            Home: +1 408 866 1912
NAS: M/S 258-6                                       Work: +1 415 604 0935
Moffett Field, CA 94035                             Pager: +1 415 428 6939