136 lines
5.4 KiB
Groff
136 lines
5.4 KiB
Groff
.\" $NetBSD: grfconfig.8,v 1.2 1995/10/09 04:11:18 chopps Exp $
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.\"
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.\" Copyright (c) 1994 Ezra Story
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Ezra Story.
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.\" 3. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\"
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.Dd October 7, 1994
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.Dt GRFCONFIG 8 amiga
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.Os
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.Sh NAME
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.Nm grfconfig
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.Nd alter grf device screen mode definitions at run time
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.Sh SYNOPSIS
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.Nm grfconfig
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.Op Fl r
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.Ar device
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.Op Ar file
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.Sh DESCRIPTION
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.Nm Grfconfig
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is used to change or view the screen mode definition list contained
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in a grf device. You may also alter the sonsole screen definition as well
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as the definitions for the graphic screen. The console will automatically
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reinitialize itself to the new screen mode.
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.Pp
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The following flags and arguments are interpreted by
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.Nm grfconfig :
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.Bl -tag -width indent
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.It Fl r
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Print out a raw listing of the mode definitions instead of the
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pretty list normally shown.
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.It Ar device
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The grf device to manipulate. This argument is required.
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.It Ar file
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The file which contains the mode definitions. If this argument
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is not specified,
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.Nm grfconfig
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will print out of a list of the modes currently loaded into
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the grf device.
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.Pp
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.Sh MODE DEFINITION FILE
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THe mode definitions are taken from a file which has lines of the format:
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.Pp
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num clk wid hi dep hbs hss hse hbe ht vbs vss vse vbe vt
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.Pp
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.Bl -tag -width indent
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.It Ar num
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The mode number for 'c' for the console mode.
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.It Ar clk
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The pixel clock in Hz.
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.It Ar wid
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The screen mode's width.
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.It Ar hi
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The screen mode's height.
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.It Ar dep
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The bitdepth of the mode.
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.It Ar hbs hss hse hbe ht
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The horizonatal timing parameters for the mode in pixel values. All the
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values are relative to the end of the horizontal blank (beginning of the
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displayed area).
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.It Ar vbs vss vse vbe vt
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The vertical timing paramters for the mode in line values. All the
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values are relative to the end of vertical blank (beginning of the displayed
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area). If vbs is half the width, the grf device will interlace the
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display.
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If the vbs is twice the width, the grf device will scan double the display.
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This is provided the grf device supports those two modes of operation.
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.El
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.Pp
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.nf
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------------------------------------------------------
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| ^ |
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| vse |
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| (0,0) |
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| *----------------------------------- |
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| | ^ ^ | |
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| | vbe ! | |
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| | ! | |
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| | ! | |
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|<-hse |<-hbe ! |<-hbs | | |
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| | ! | hss->| hse->| hbe->|
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| | hi | | | |
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| | ! | |
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| | ! | |
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| |<============ wid =========+=====>| |
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| | ! | |
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| | ! | |
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| | ! | |
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| | v | |
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| ------------------------------------ |
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| ^ |
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| vbs |
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------------------------------------------------------
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^
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vss
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- ------- -
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^
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vse
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- ------- -
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^
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vbe
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.Sh BUGS
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Some grf devices only understand horixontal cycle values instead of
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horizontal pixel values. Add
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the option
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.Nm -o
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to make grfconfig interpret values from the grf device as cycle values.
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