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DART(4) Device Drivers Manual (mvme88k) DART(4)

NAME

dartMC68681 or MC68692 dual UART

SYNOPSIS

dart0 at angelfire0 offset 0x640000 ipl 5
dart0 at syscon0 offset 0x82000 ipl 3

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 MVME180, MVME181 and MVME188 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: 50, 75, 110, 134.5, 150, 200, 300, 600, 1050, 1200, 1800, 200, 2400, 4800, 7200, 9600, 19200 and 38400 bps.
On MVME180 and MVME181, the counter/timer is used to provide the scheduling clock, while on MVME188, the counter/timer is used to provide the statistics clock.

FILES

/dev/ttya
 
/dev/ttyb
 

SEE ALSO

intro(4), tty(4)
October 15, 2013 OpenBSD-5.5