BSD 4_3_Reno release

[unix-history] / usr / src / share / man / man4 / man4.vax / dmz.4

diff --git a/usr/src/share/man/man4/man4.vax/dmz.4 b/usr/src/share/man/man4/man4.vax/dmz.4
index be8d2f5..b8d537b 100644 (file)
--- a/usr/src/share/man/man4/man4.vax/dmz.4
+++ b/usr/src/share/man/man4/man4.vax/dmz.4
@@ -2,7 +2,7 @@
 .\" All rights reserved.  The Berkeley software License Agreement
 .\" specifies the terms and conditions for redistribution.
 .\"
 .\" All rights reserved.  The Berkeley software License Agreement
 .\" specifies the terms and conditions for redistribution.
 .\"

-.\"    @(#)dmz.4       6.1 (Berkeley) %G%
+.\"    @(#)dmz.4       6.3 (Berkeley) 5/16/86

 .\"
 .TH DMZ 4 "April 7, 1986"
 .UC 5
 .\"
 .TH DMZ 4 "April 7, 1986"
 .UC 5


@@ -17,9 +17,6 @@ dmz \- DMZ-32 terminal multiplexor
 The 
 .I dmz
 device provides 24 lines of asynchronous serial line support.
 The 
 .I dmz
 device provides 24 lines of asynchronous serial line support.

-The DMZ-32 is connected to an H3014 distribution panel
-by a cable that may be up to a mile in length and
-the two ends communicate using a T1 protocol.

 Modem control on all ports is available
 as an option for the H3014 distribution panel.
 .PP
 Modem control on all ports is available
 as an option for the H3014 distribution panel.
 .PP


@@ -45,13 +42,11 @@ to be treated in this way.
 .PP
 The
 .I dmz
 .PP
 The
 .I dmz

-driver normally uses input silos and polls for input at each clock
-tick (10 milliseconds).
-It uses an adaptive algorithm on output
-to decide whether to use programmed I/O or DMA
-based on the amount of data to send.
+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.

 .SH FILES
 .SH FILES

-/dev/tty[abc][0-9a-n]
+/dev/tty[abcefg][0-9a-n]

 .SH SEE ALSO
 tty(4)
 .SH DIAGNOSTICS
 .SH SEE ALSO
 tty(4)
 .SH DIAGNOSTICS


@@ -68,3 +63,7 @@ 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.
 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.

+.SH BUGS
+It should be possible to set the silo timeout with a configuration file option,
+as the value is a trade-off between efficiency and response time for flow
+control and character echo.