1*61597Sbostic.\" Copyright (c) 1980, 1991, 1993 2*61597Sbostic.\" The Regents of the University of California. All rights reserved. 320656Smckusick.\" 447674Scael.\" %sccs.include.redist.man% 520656Smckusick.\" 6*61597Sbostic.\" @(#)dz.4 8.1 (Berkeley) 06/05/93 747674Scael.\" 847674Scael.Dd 947674Scael.Dt DZ 4 vax 1047674Scael.Os BSD 4 1147674Scael.Sh NAME 1247674Scael.Nm dz 1347674Scael.Nd 1447674Scael.Tn DZ-11 1547674Scaelmultiplexer device interface 1647674Scael.Sh SYNOPSIS 1747674Scael.Cd "device dz0 at uba0 csr 0160100 vector dzrint dzxint" 1847674Scael.Sh DESCRIPTION 1947674ScaelA 2047674Scael.Tn DZ-11 2147674Scaelprovides 8 communication lines with partial modem control, 2247674Scaeladequate for 2347674Scael.Tn UNIX 2447674Scaeldialup use. 2547674Scael.Pp 2647674ScaelAn optional argument 2747674Scael.Ar flags 2847674Scaelmay be supplied with the device specification 2947674Scaelin the config file indicating 3047674Scaelthat the line corresponding to 3147674Scaelbit number 3247674Scael.Ar i 3347674Scaelis not properly 3447674Scaelconnected, and should be treated as hard-wired with carrier 3547674Scaelalways present. Thus specifying 3647674Scael.Ql flags 0x04 3747674Scaelfor 3847674Scael.Li dz0 3947674Scaelwould cause line 4047674Scael.Pa tty02 4147674Scaelto be treated in this way. 4247674Scael.Pp 4347674ScaelNormal I/O 4447674Scaelcontrol parameters for individual lines are managed by 4547674Scael.Xr ioctl 2 4647674Scaelcalls. 4747674ScaelLine speeds may be initiated via 4847674Scaelthe 4947674Scael.Xr ttys 5 5047674Scaelfile, 5147674Scael.Xr stty 1 5247674Scaelor 5347674Scael.Xr ifconfig 8 5447674Scaelto name a few, 5547674Scaelsee 5647674Scael.Xr tty 4 . 5747674Scael.Pp 5828259SkarelsThe 5947674Scael.Nm dz 6028259Skarelsdriver monitors the rate of input on each board, 6128259Skarelsand switches between the use of character-at-a-time interrupts 6228259Skarelsand input silos. 6328259SkarelsWhile the silo is enabled during periods of high-speed input, 6428259Skarelsthe driver polls for input 30 times per second. 6547674Scael.Sh FILES 6647674Scael.Bl -tag -width /dev/tty[0-9][0-9]xx -compact 6747674Scael.It Pa /dev/tty[0-9][0-9] 6847674Scael.It Pa /dev/ttyd[0-9a-f] 6947674Scaeldialups 7047674Scael.El 7147674Scael.Sh DIAGNOSTICS 7247674Scael.Bl -diag 7347674Scael.It dz%d: silo overflow . 7447674ScaelThe 64 character input silo overflowed 7520656Smckusickbefore it could be serviced. This can happen if a hard error occurs 7647674Scaelwhen the 7747674Scael.Tn CPU 7847674Scaelis running with elevated priority, as the system will 7928259Skarelsthen print a message on the console with interrupts disabled. 8020656SmckusickIt is not serious. 8147674Scael.El 8247674Scael.Sh SEE ALSO 8347674Scael.Xr stty 1 , 8447674Scael.Xr tty 4 , 8547674Scael.Xr ttys 5 , 8647674Scael.Xr getty 8 8747674Scael.Sh HISTORY 8847674ScaelA 8947674Scael.Nm 9047674Scaeldriver appeared in 9147674Scael.At 32v . 92