NAME
boca —
multiplexing serial communications
interface
SYNOPSIS
For 4-port BB1004 boards and 8-port BB1008 boards:
boca0 at isa? port 0x100 irq 5
com* at boca?
For 16-port BB2016 boards:
boca0 at isa? port 0x100 irq 5
boca1 at isa? port 0x140 irq 5
com* at boca?
(The BB2016 is functionally equivalent to two BB1008 boards, and is configured as such.)
DESCRIPTION
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
- /dev/tty??
SEE ALSO
HISTORY
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.