TCOM(4) | Device Drivers 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 register 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.

May 20, 1998 | NetBSD 10.1