1vga_setmodeX(3) Svgalib User Manual vga_setmodeX(3)
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6 vga_setmodeX - try to set Mode X-like memory organization
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9 #include <vga.h>
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11 void vga_setmodeX(void);
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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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34 svgalib(7), vgagl(7), libvga.config(5), vgatest(6), vga_getmodeinfo(3),
35 vga_setmode(3), vga_setpage(3),
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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)