06-30-2015
Ultrix run on MIPS chips. Not Alpha chips
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UMCS(4) BSD Kernel Interfaces Manual UMCS(4)
NAME
umcs -- USB support for serial adapters based on the MCS7820 and MCS7840 chips
SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file:
device usb
device ucom
device umcs
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
umcs_load="YES"
DESCRIPTION
The umcs driver provides support for various multiport serial adapters based on the MosCom MCS7820 and MCS7840 chips. They are 2- or 4-port
adapters with full-featured 16550-compatible UARTs and very flexible baud generators. Also, these chips support RS422/RS485 and IrDA opera-
tions.
The device is accessed through the ucom(4) driver which makes it behave like a tty(4).
Different ports on device are presented as sub-units, like /dev/ttyU0.1 and /dev/ttyU0.2.
HARDWARE
The umcs driver was tested on the following adapters:
o ST Lab U-360 two-port serial USB adapter
o ST Lab U-400 four-port serial USB adapter
SEE ALSO
tty(4), ucom(4), usb(4)
HISTORY
The umcs driver appeared in ports since December of 2010.
AUTHORS
The umcs driver was written by Lev Serebryakov <lev@FreeBSD.org>.
BUGS
This driver doesn't support access to any fine tunes of chip, like RS522/RS485 mode, non-standard baudrates, etc.
BSD
February 25, 2012 BSD