TCOM(4) BSD Kernel Interfaces Manual TCOM(4)NAME
tcom -- multiplexing serial communications interface
SYNOPSIS
For 4-port TC-400 series boards:
tcom0 at isa? port 0x100 irq 5
com2 at tcom? slave ?
com3 at tcom? slave ?
com4 at tcom? slave ?
com5 at tcom? slave ?
For 8-port TC-800 series boards:
tcom0 at isa? port 0x100 irq 5
com2 at tcom? slave ?
com3 at tcom? slave ?
com4 at tcom? slave ?
com5 at tcom? slave ?
com6 at tcom? slave ?
com7 at tcom? slave ?
com8 at tcom? slave ?
com9 at tcom? slave ?
DESCRIPTION
The tcom driver provides support for the Byte Runner Technologies TC-400 and TC-800 series boards that multiplex together up to four or eight
EIA RS-232C (CCITT V.28) communications interfaces.
Each tcom device is the master device for up to eight com devices. The kernel configuration specifies these com devices as slave devices of
the tcom device, as shown in the synopsis. The slave ID given for each com device determines which bit in the interrupt multiplexing regis-
ter is tested to find interrupts for that device. The port specification for the tcom device is used to compute the base addresses for the
com subdevices and the port for the interrupt multiplexing register.
Not all possible configuration options are currently supported (for example, speeds beyond 115200 baud are not currently supported).
FILES
/dev/tty??
SEE ALSO com(4)HISTORY
The tcom driver was written by Jukka Marin.
BSD May 20, 1998 BSD
Check Out this Related Man Page
RTFPS(4) BSD Kernel Interfaces Manual RTFPS(4)NAME
rtfps -- multiplexing serial communications interface
SYNOPSIS
rtfps0 at isa? port 0x1230 irq 10
com2 at rtfps0 slave 0
com3 at rtfps0 slave 1
com4 at rtfps0 slave 2
com5 at rtfps0 slave 3
DESCRIPTION
The rtfps driver provides support for IBM RT PC boards that multiplex together up to four EIA RS-232C (CCITT V.28) or RS-422A communications
interfaces.
Each rtfps device is the master device for up to four com devices. The kernel configuration specifies these com devices as slave devices of
the rtfps device, as shown in the synopsis. The port specification for the rtfps device is used to compute the base addresses for the com
subdevices.
FILES
/dev/tty0?
SEE ALSO com(4)HISTORY
The rtfps driver was written by Charles Hannum, based on the ast driver.
BUGS
The rtfps driver is unlikely to work on non-EISA and non-PCI machines. The ISA bus only asserts 10 I/O address lines, and this is not
enough.
Even on EISA and PCI machines, some address conflicts have been observed. On one machine, the second port always conflicted with something
(though it's not clear what) and caused strange results. Disabling the second port in the kernel config allowed the other three ports to
function correctly.
BSD August 7, 1994 BSD
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