Felisp
84436a5ae0
http://my.svgalib.org/svgalib/svgalib-1.9.25.tar.gz http://my.svgalib.org/svgalib/
55 lines
1.6 KiB
Groff
55 lines
1.6 KiB
Groff
.TH vga_getgraphmem 3 "27 July 1997" "Svgalib (>= 1.2.11)" "Svgalib User Manual"
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.SH NAME
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vga_getgraphmem \- returns the address of the VGA memory
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.SH SYNOPSIS
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.B "#include <vga.h>"
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.BR "unsigned char *graph_mem;"
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/* This declaration is already in vga.h */
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.BI "unsigned char *vga_getgraphmem(void);"
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.SH DESCRIPTION
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returns a pointer to the 64K VGA frame buffer window.
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.BR vga_setpage (3),
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.BR vga_setreadpage "(3) and "
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.BR vga_setwritepage (3)
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allow to select which page of the VGA memory shows up at this position.
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.BR vga_setlinearaddressing (3)
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maps all VGA memory at a consecutive memory area (if the hardware supports it).
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In this mode,
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.BI "vga_getgraphmem()"
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will return the location of this area too. You can also access the global variable
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.BR graph_mem ,
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which will also contain this address.
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Most demos, esp.
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.BR vgatest (6)
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show the simple direct use of this function to access screen memory.
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.SH SEE ALSO
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.BR svgalib (7),
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.BR vgatest (6),
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.BR fun (6),
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.BR testlinear (6),
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.BR vga_setlinearaddressing (3),
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.BR vga_claimvideomemory (3),
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.BR vga_getmodeinfo (3),
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.BR vga_setpage (3),
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.BR vga_setreadpage (3),
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.BR vga_setwritepage (3),
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.SH AUTHOR
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This manual page was edited by Michael Weller <eowmob@exp-math.uni-essen.de>. The
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exact source of the referenced function as well as of the original documentation is
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unknown.
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It is very likely that both are at least to some extent are due to
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Harm Hanemaayer <H.Hanemaayer@inter.nl.net>.
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Occasionally this might be wrong. I hereby
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asked to be excused by the original author and will happily accept any additions or corrections
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to this first version of the svgalib manual.
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