1vga_setwritepage(3) Svgalib User Manual vga_setwritepage(3)
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6 vga_setwritepage - set the 64K SVGA page number
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9 #include <vga.h>
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11 void vga_setwritepage(int page);
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15 Usually SVGA cards have more than the 64K memory which suffice for an
16 ordinary VGA. However, the memory window mapped at vga_getgraphmem(3)
17 is only 64K bytes large. vga_setwritepage() selects the page-th 64K
18 memory chunk to be visible for writes at position vga_getgraphmem(3).
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20 vga_setreadpage(3) allows a different 64K memory chunk to be modified
21 by reads from this memory window. This is a very useful feature for
22 screen to screen pixmap copies. However, not all cards support this in
23 all graphics modes. Check vga_modeinfo(3) for availability. Esp. as
24 this feature can also not be used when in background mode.
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26 Of course, this function must be used in conjunction with vga_setread‐
27 page(3) but may not be used in conjunction with vga_setpage(3).
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31 svgalib(7), vgagl(7), libvga.config(5), fun(6), vgatest(6), vga_get‐
32 graphmem(3), vga_claimvideomemory(3), vga_modeinfo(3) vga_setpage(3),
33 vga_setreadpage(3), vga_setlinearaddressing(3)
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36 This manual page was edited by Michael Weller <eowmob@exp-math.uni-
37 essen.de>. The exact source of the referenced function as well as of
38 the original documentation is unknown.
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40 It is very likely that both are at least to some extent are due to Harm
41 Hanemaayer <H.Hanemaayer@inter.nl.net>.
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43 Occasionally this might be wrong. I hereby asked to be excused by the
44 original author and will happily accept any additions or corrections to
45 this first version of the svgalib manual.
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49Svgalib (>= 1.2.11) 27 July 1997 vga_setwritepage(3)