NAME
dart —
MC68681 or MC68692 dual UART
SYNOPSIS
dart0 at ofobio0 offset 0x20000 ipl 5
(MVME141)
dart0 at lrc0 offset 0x40000 ipl 5 (MVME165)
DESCRIPTION
The MC68681 and MC68692 dual asynchronous receiver/transmitter (DUART) component provides two serial ports, as well as a 16-bit programmable counter/timer.
The dart driver provides support for the
two serial ports found onboard MVME141 and MVME165 systems.
The dart serial ports have a two character
buffer on the transmit path, and a four character buffer on the receive
path.
The following link speeds are supported by the
dart driver: 75, 110, 134.5, 150, 300, 600, 1200,
1800, 2400, 4800, 9600 and 19200 bps.
On MVME141, the counter/timer is used to provide the scheduling clock.
FILES
- /dev/ttya
- /dev/ttyb
SEE ALSO
BUGS
The following link speeds are supported by the hardware, but not
by the dart driver yet: 50, 200, 1050, 2000, 7200
and 38400 bps.