NAME    [Toc]    [Back]

     boca - multiplexing serial communications interface

SYNOPSIS    [Toc]    [Back]

     For 4-port BB1004 boards and 8-port BB1008 boards:

     boca0 at isa? port 0x100 irq 5
     com* at boca? slave ?
     or
     pccom* at boca? slave ?

     For 16-port BB2016 boards:

     boca0 at isa? port 0x100 irq 5
     boca1 at isa? port 0x140 irq 5
     com* at boca? slave ?
     or
     pccom* at boca? slave ?

     (The BB2016 is functionally equivalent to two BB1008 boards,
and is configured
 as such.)

DESCRIPTION    [Toc]    [Back]

     The  boca  driver provides support for BOCA Research BB1004,
BB1008, and
     BB2016 boards that multiplex together up to four, eight,  or
sixteen EIA
     RS-232C (CCITT V.28) communications interfaces.

     Each  boca  device  is the master device for up to eight com
devices.  The
     kernel configuration specifies these com  devices  as  slave
devices of the
     boca  device,  as shown in 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
     boca device is used to compute the base  addresses  for  the
com subdevices
     and the port for the interrupt multiplexing register.

FILES    [Toc]    [Back]

     /dev/tty??

SEE ALSO    [Toc]    [Back]

     com(4), intro(4), isa(4)

HISTORY    [Toc]    [Back]

     The  boca driver was written by Charles Hannum, based on the
ast driver
     and source code from David Muir Sharnoff.  David  wishes  to
acknowledge
     the assistance of Jason Venner in determining how to use the
BOCA boards.

OpenBSD     3.6                         January      3,      1995