.\"	$OpenBSD: qsc.4,v 1.3 2007/05/31 19:19:57 jmc Exp $
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.\"     from: @(#)dz.4	6.3 (Berkeley) 3/27/91
.\"
.Dd $Mdocdate: May 31 2007 $
.Dt QSC 4 vax
.Os
.Sh NAME
.Nm qsc
.Nd SC26C94 quad UART controller
.Sh SYNOPSIS
.Cd "qsc0 at vxtbus0"
.Cd "lkkbd0 at qsc0 line 2"
.Cd "lkms0  at qsc0 line 3"
.Sh DESCRIPTION
The
.Nm
driver provides support for the SC26C94-driven serial ports on the
VXT2000 terminals.
.Pp
On these machines, line 0 is connected to the serial connector on the back,
while line 2 and line 3 are connected to the keyboard and mouse
connectors, which are driven by the
.Nm lkkbd
and
.Nm lkms
drivers, respectively.
Line 1 is not connected to anything.
.Sh FILES
.Bl -tag -width /dev/ttyb[0-3] -compact
.It Pa /dev/ttyb[0-3]
.El
.Sh DIAGNOSTICS
.Bl -diag
.It qsc%d line %d: receiver overrun
The 8 character input fifo has overflowed and incoming data has been lost.
.El
.Sh SEE ALSO
.Xr intro 4 ,
.Xr lkkbd 4 ,
.Xr lkms 4 ,
.Xr tty 4 ,
.Xr vxtbus 4