NAME
dz —
eMIPS console serial device
interface
SYNOPSIS
dz* at ebus0 addr ?
DESCRIPTION
This serial line provides a simple communication line with no modem control. It
is not adequate for
UNIX dialup use.
Normal I/O control parameters for individual lines are managed by
ioctl(2) calls. Line speeds
may be initiated via the
ttys(5) file,
stty(1) or
ifconfig(8) to name a few,
see
tty(4).
The
dz driver monitors the rate of input on each board, and
switches between the use of character-at-a-time interrupts and input silos.
While the silo is enabled during periods of high-speed input, the driver polls
for input 30 times per second.
FILES
- /dev/ttyD0
- phys interface.
DIAGNOSTICS
- dz%d: silo overflow.
- The 1 character input silo overflowed before it could be
serviced. This can happen if a hard error occurs when the CPU is running
with elevated priority, as the system will then print a message on the
console with interrupts disabled. It is not serious.
SEE ALSO
stty(1),
tty(4),
ttys(5),
getty(8)
HISTORY
A
dz driver appeared in
NetBSD
6.0.