.\"	$NetBSD: nell.4,v 1.11 2008/04/30 13:10:56 martin Exp $
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.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Martin Husemann <martin@NetBSD.org>.
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.Dd January 7, 2004
.Dt NELL 4 sparc
.Os
.Sh NAME
.Nm nell
.Nd sbus pcmcia bridge
.Sh SYNOPSIS
# only needed for 32bit sparcs (remove the options line on sparc64):
.Cd "options FULL_SPARC_BUS_SPACE"
.Cd "nell* at sbus? slot ? offset ? flags 0"
.Cd "pcmcia* at nell? controller ? socket ?"
.Sh DESCRIPTION
The
.Nm
is a pcmcia bridge for the sbus.
It is also known as STP4020, the name
of the chipset used to implement it, and has SUN part number 501-2367.
.Pp
The firmware assigns two interrupt levels to the nell, but the driver only
needs a single interrupt.
Depending on distribution of interrupt levels on your machine you might
prefer the driver to use either the first (use flags value 0) or the second
(use flags value 1).
.Sh KERNEL THREAD
Each
.Nm
instance creates a kernel thread, named like the instance.
This thread is used to watch for card insertions and removals, and
handling the attachment and initialization of the card's driver.
.Sh SEE ALSO
.Xr pcmcia 4 ,
.Xr sbus 4