netbsd man page for ioat

IOAT(4) 						   BSD Kernel Interfaces Manual 						   IOAT(4)

NAME
     ioat -- multiplexing serial communications interface

SYNOPSIS
     For 6-port BOCA IOAT66 board:

     ioat0   at isa? port 0x220 irq 5
     com2    at ioat? slave ?
     com3    at ioat? slave ?
     com4    at ioat? slave ?
     com5    at ioat? slave ?
     com6    at ioat? slave ?
     com7    at ioat? slave ?

DESCRIPTION
     The ioat driver provides support for BOCA Research IOAT66 boards that multiplex together up to six EIA RS-232C (CCITT V.28) communications
     interfaces.

     Each ioat device is the master device for up to six com devices.  The kernel configuration specifies these com devices as slave devices of
     the ioat device, as shown in the synopsis.  The slave ID given for each com device determines which bit in the interrupt multiplexing regis-
     ter is tested to find interrupts for that device.	The port specification for the ioat device is used to compute the base addresses for the
     com subdevices. The port for the interrupt multiplexing register is not programmable.

FILES
     /dev/tty??

SEE ALSO
     com(4)

HISTORY
     The ioat driver was adapted from the boca driver by Michael Richardson.

BSD
								 January 24, 2000							       BSD