.\" Copyright (c) 1986 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"	@(#)vx.4	6.1 (Berkeley) 11/24/86
.\"
.TH VIOC 4 ""
.UC 7
.SH NAME
vioc \- VIOC-X communications multiplexer
.SH SYNOPSIS
device vx0 at vba0 csr 0xfe4000
.SH DESCRIPTION
A VIOC-X provides 16 communication lines with partial modem control,
adequate for UNIX dialup use.
Each line attached to the VIOC-X communications multiplexer
behaves as described in
.IR tty (4)
and may be set to run at any of 16 speeds; see
.IR tty (4)
for the encoding.
.PP
Each VIOC-X controller uses 3 entries in the SCB for command terminated,
acknowledge, and unsolicited (input) interrupts.
These entries start at 0x40 for the 1st controller, 0x44 for the 2nd, etc.
.SH FILES
/dev/tty[0-9][0-9]
.br
/dev/ttyd[0-9a-f]		dialups
.SH "SEE ALSO"
tty(4)