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AR(4)		     FreeBSD/i386 Kernel Interfaces Manual		 AR(4)

NAME
     ar	-- synchronous Digi/Arnet device driver

SYNOPSIS
     device ar0	at isa?	port 0x300 irq 10 iomem	0xd0000
     device ar1	at isa?	port 0x310 irq 11 iomem	0xd0000

     pseudo-device sppp

DESCRIPTION
     The ar driver supports the	Digi/Arnet SYNC/570i ISA and PCI cards that is
     based on the HD64570 chip.	 Both the 2 and	4 port cards are supported and
     auto detected.

     The standard FreeBSD sppp code is used for	the link level layer.  The
     default protocol used is PPP.  The	Cisco HDLC protocol can	be used	by
     adding link2 to ifconfig(8).

     Alternately, the driver can be compiled to	support	netgraph(4) (see
     below).

NUMBERING
     Only one line for each card is needed in the kernel configuration file.
     The first card's ports will be installed from ar0.	The numbering of the
     next card will continue where the first stopped, eg. if the first card is
     a two port	card it	will use ar0 and ar1. The next card will then start at
     ar2.

     The card only supports IRQ	3, 5, 7, 10, 11, 12 and	15.

     The iomem area is a 16Kb block and	must start at a	16Kb boundary.

NETGRAPH SUPPORT
     If	the kernel is compiled with options NETGRAPH then the sppp and Cisco
     HDLC modes	are disabled (and the sppp driver is unneeded),	and this
     driver functions as a netgraph(4) node with a single hook named rawdata.
     Connecting	to this	hook enables the transmission of raw HDLC frames.  The
     node will have the	same name as the device	with ``sync_'' prepended,
     e.g., sync_ar0.

DIAGNOSTICS
     ar%d: Warning illegal interrupt %d.  The card cannot use the specified
     interrupt.	 Choose	a different one.

FILES
     /sys/i386/isa/ic/hd64570.h
     /sys/i386/isa/if_arregs.h
     /sys/i386/isa/if_ar.c
     /sys/i386/isa/if_ar.h
     /sys/pci/if_ar_p.c

BUGS
     At	the moment only	the V.35 and X.21 interfaces are tested.  The others
     may need tweaks to	the clock selection code.

     The code can probably stand some optimizing.

     Please report bugs	to <jhay@FreeBSD.org>.

SEE ALSO
     cx(4), netgraph(4), netintro(4), sr(4), ifconfig(8)

HISTORY
     The ar device driver first	appeared in FreeBSD 2.2.

AUTHORS
     The ar device driver was written by John Hay <jhay@FreeBSD.org>.  Net-
     graph support was added by	Julian Elischer	<julian@FreeBSD.org>.

FreeBSD	10.1		       November	19, 1995		  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | NUMBERING | NETGRAPH SUPPORT | DIAGNOSTICS | FILES | BUGS | SEE ALSO | HISTORY | AUTHORS

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