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NetBSD 6.1.5 - man page for ioat (netbsd section 4)

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
     register 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 inter-
     rupt 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


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