Subject: Re: Another changer, another changer problem
To: NetBSD-current Discussion List <>
From: David Maxwell <>
List: current-users
Date: 10/05/1998 23:41:42
On Mon, Oct 05, 1998 at 09:12:35PM -0400, Greg A. Woods wrote:
> [ On Mon, October 5, 1998 at 14:02:57 (-0700), Bill Studenmund wrote: ]
> > Actually, the "dev" number is motherboard-specific. It's a function of how
> > the motherboard (well, the host-PCI chipset) deals with configuration
> > space writes and how the board is wired. When you access a configuration
> > register, part of the address is decoded using a wire which is fed
> > directly to the chip/card.

Mental note: keep a generic kernel in / to boot off convieniently if/when
PCI slot and/or scsi card go bad, need to be moved due to space considerations
in the case, conflict with IRQ needed for another card...

> Hmm...  Too bad the Sys Admin Guide's configuration chapter is way out
> of date and not included in /usr/share/doc.  It could discuss all these
> issues, give examples of how to wire things down, and so on.

Currently, the requirement to build a kernel for each change makes the
whole wiring down suggestion echo around here a bit troublesome. It
would be more practical when we have a boot time method for changing IRQ,
IO, DMA, dev, etc....

David Maxwell,| --> Mastery of UNIX, like
mastery of language, offers real freedom. The price of freedom is always dear,
but there's no substitute. Personally, I'd rather pay for my freedom than live
in a bitmapped, pop-up-happy dungeon like NT. - Thomas Scoville