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
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.