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Diffstat (limited to 'share/man/man4/man4.sparc/cgtwelve.4')
-rw-r--r--share/man/man4/man4.sparc/cgtwelve.418
1 files changed, 16 insertions, 2 deletions
diff --git a/share/man/man4/man4.sparc/cgtwelve.4 b/share/man/man4/man4.sparc/cgtwelve.4
index 94007a22229..b884801463b 100644
--- a/share/man/man4/man4.sparc/cgtwelve.4
+++ b/share/man/man4/man4.sparc/cgtwelve.4
@@ -1,4 +1,4 @@
-.\" $OpenBSD: cgtwelve.4,v 1.2 2002/08/31 10:47:16 miod Exp $
+.\" $OpenBSD: cgtwelve.4,v 1.3 2002/09/20 12:48:53 fgsch Exp $
.\" Copyright (c) 2002 Miodrag Vallat. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
@@ -29,7 +29,7 @@
.Nm cgtwelve
.Nd accelerated 24-bit color frame buffer
.Sh SYNOPSIS
-.Cd "cgtwelve* at sbus? slot ? offset ?"
+.Cd "cgtwelve* at sbus? slot ? offset ? flags 0x0000"
.Cd "wsdisplay* at cgtwelve?"
.Sh DESCRIPTION
The
@@ -42,6 +42,18 @@ It does not provide direct device driver entry points
but makes its functions available via the internal
.Xr wsdisplay 4
interface.
+.Pp
+By default, the frame buffer will be initialized in 24 bit mode.
+By setting
+.Ar flags
+to
+.Ar 0x0001
+(via
+.Xr config 8
+or
+.Xr boot_config 8 )
+it can be forced to use the monochrome overlay plane only, resulting in a
+faster console.
.Sh SEE ALSO
.Xr bwtwo 4 ,
.Xr cgeight 4 ,
@@ -56,5 +68,7 @@ interface.
.Xr vigra 4 ,
.Xr wscons 4 ,
.Xr wsdisplay 4
+.Xr boot_config 8 ,
+.Xr config 8
.Sh CAVEATS
Vertical scrolling in console mode is abysmally slow.