diff options
Diffstat (limited to 'share/man/man4/man4.vax/smg.4')
| -rw-r--r-- | share/man/man4/man4.vax/smg.4 | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/share/man/man4/man4.vax/smg.4 b/share/man/man4/man4.vax/smg.4 index 39915e0f1e4..d56d5ade2fb 100644 --- a/share/man/man4/man4.vax/smg.4 +++ b/share/man/man4/man4.vax/smg.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: smg.4,v 1.4 2003/06/06 10:29:42 jmc Exp $ +.\" $OpenBSD: smg.4,v 1.5 2006/07/28 21:25:21 miod Exp $ .\" .\" Copyright (c) 2003 Jason L. Wright (jason@thought.net) .\" All rights reserved. @@ -24,7 +24,7 @@ .\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE .\" POSSIBILITY OF SUCH DAMAGE. .\" -.Dd March 6, 2003 +.Dd July 28, 2006 .Dt SMG 4 vax .Os .Sh NAME @@ -36,15 +36,38 @@ .Sh DESCRIPTION The .Nm -is a memory based monochrome frame buffer driver for the +is a monochrome frame buffer found on-board most VAXstation 3100 systems. +.Pp +The +.Nm +driver interfaces the frame buffer with the .Xr wscons 4 console framework. It does not provide direct device driver entry points but makes its functions available via the internal .Xr wsdisplay 4 interface. +.Pp +When a color option board (either a +.Xr gpx 4 +or a spx frame buffer) is installed, the +.Nm +driver will not attach by default, since the color option takes over the +video connector on the back of the system. +However, the output signal pins are independent, and it is possible to +connect a monochrome video cable even if a color option board is installed. +To force the +.Nm +driver to attach in this case, change the device flags to 1. +It will however not be possible to use the monochrome frame buffer +as the +.Ox +console in this case. .Sh SEE ALSO +.Xr gpx 4 , .Xr intro 4 , +.Xr lcg 4 , +.Xr lcspx 4 , .Xr vsbus 4 , .Xr wscons 4 , .Xr wsdisplay 4 |