DMZ(4) | Device Drivers Manual (vax) | DMZ(4) |
dmz
—
dmz0 at uba? csr 0160540 vector dmzrinta dmzxinta dmzrintb
dmzxintb dmzrintc dmzxintc
The dmz
device provides 24 lines of
asynchronous serial line support. Modem control on all ports is available as
an option for the H3014 distribution panel.
An optional argument flags may be supplied
with the device specification for dmz
in the config
file indicating that the line corresponding to bit number
i is not properly connected, and should be treated as
hard-wired with carrier always present. Thus specifying
‘flags 0x000004
’ for
dmz0
would cause line ttya2
to be treated in this way.
Normal I/O control parameters for individual lines are managed by ioctl(2) calls. Line speeds (there are 16 choices for the DMZ) may be initiated via getty(8) and stty(1) or may be communicated by other programs which use ioctl(2) such as ifconfig(8), see tty(4).
The dmz
driver normally enables the input
silos with a short timeout (30 milliseconds); this allows multiple
characters to be received per interrupt during periods of high-speed
input.
dmz
driver appeared in
4.3BSD.
June 5, 1993 | NetBSD 9.4 |