IOAT(4)                 NetBSD 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 subde-
     vices. The port for the interrupt multiplexing register is not pro-
     grammable.

FILES
     /dev/tty??

SEE ALSO
     com(4)

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

NetBSD 6.0.1                   January 24, 2000                   NetBSD 6.0.1

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