Subject: Re: DMA
To: der Mouse <mouse@Collatz.McRCIM.McGill.EDU>
From: Mauricio Tavares <>
List: port-sun3
Date: 01/14/1996 20:29:15
While shopping for shruberries, der Mouse pondered:
> > So I now have a 1GB SCSI2 drive attached to the 3/50 [...].
> > Currently, it takes quite a lot of time to access the drive; [...].
> > Would enabling the DMA "mode" speed up this drive so that I will be
> > able to load X in my lifetime?
> Probably.  I certainly find it makes an immense difference.
	Talking about that, what each value for si_options mean and which 
one should I use?

> > In an unrelated topic, how do you rebuild the kernel in NetBSD?  In
> > ultrix we had this /usr/sys directory where the kernel config file
> > would be hidden.  Would NetBSD have something similar?
> /usr/src/sys.  Normally /sys is a symlink to it.
	So, that's where it hides.  Of course, I did have to download and 
install ksrc11, but that is besides the point. =)

> If you want to rebuild a GENERIC sun3 kernel, for example, it'd be
> something like this:
> # cd /sys/arch/sun3/conf
> # config GENERIC
> # cd ../compile/GENERIC
> # make depend && make
> At this point, assuming everything worked, you'll find it's built a
> "netbsd", which is your new kernel.
	Should I do that in single user mode, as I used to do when 
modifying the kernel of that bloody Ultrix box, or can I create the 
kernel in multiuser mode?


| Mauricio Tavares          | "We will attack...                          |
| |  ...under the cover of daylight!" Rimmer    |