1vga_setmodeX(3)               Svgalib User Manual              vga_setmodeX(3)
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NAME

6       vga_setmodeX - try to set Mode X-like memory organization
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SYNOPSIS

9       #include <vga.h>
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11       void vga_setmodeX(void);
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DESCRIPTION

15       Try to enable Mode X-like memory organization for 256 color modes using
16       up to 256K of memory like 320x200x256 and 640x400x256.
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18       Modes like 320x240x256 etc. are  Mode  X-like  by  default.   vga_mode‐
19       info(3) lists which modes have Mode X memory layout.
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21       A  mode  X  like  memory  layout means that memory is organized in four
22       pages (set_page(3)) and that the top most pixel 0,1,2,3 are  the  first
23       pixel  in  pages  0,1,2,3. Pixels 4,5,6,7 are than the second pixels in
24       pages 0,1,2,3.
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26       The other, packed pixel, mode will have pixel 0,1,2,3 as pixel  0,1,2,3
27       in page 0 and so on. It will only use the next pages if the size of the
28       first 64K page is exceeded. Most SVGA 256 color modes work this way.
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30       This is not guaranteed to work. Probably a new mode should  be  defined
31       for planar 320x200x256.
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SEE ALSO

34       svgalib(7), vgagl(7), libvga.config(5), vgatest(6), vga_getmodeinfo(3),
35       vga_setmode(3), vga_setpage(3),
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AUTHOR

38       This manual page was edited  by  Michael  Weller  <eowmob@exp-math.uni-
39       essen.de>.  The  exact  source of the referenced function as well as of
40       the original documentation is unknown.
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42       It is very likely that both are at least to some extent are due to Harm
43       Hanemaayer <H.Hanemaayer@inter.nl.net>.
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45       Occasionally  this  might be wrong. I hereby asked to be excused by the
46       original author and will happily accept any additions or corrections to
47       this first version of the svgalib manual.
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51Svgalib (>= 1.2.11)              27 July 1997                  vga_setmodeX(3)