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vga_setreadpage(3)	      Svgalib User Manual	    vga_setreadpage(3)

NAME
       vga_setreadpage - set the 64K SVGA page number

SYNOPSIS
       #include	<vga.h>

       void vga_setreadpage(int	page);

DESCRIPTION
       Usually	SVGA  cards have more than the 64K memory which	suffice	for an
       ordinary	VGA.  However, the memory window mapped	at  vga_getgraphmem(3)
       is  only	 64K  bytes  large.  vga_setreadpage() selects the page-th 64K
       memory chunk to be visible for reads at position	vga_getgraphmem(3).

       vga_setwritepage(3) allows a different 64K memory chunk to be  modified
       by  writes  to  this  memory  window. This is a very useful feature for
       screen to screen	pixmap copies. However,	not all	cards support this  in
       all graphics mode. Check	vga_modeinfo(3)	for availability. Esp. as this
       feature can also	not be used when in background mode.

       Of  course,  this  function  must   be	used   in   conjunction	  with
       vga_setwritepage(3)  but	 may  not be used in conjunction with vga_set-
       page(3).

SEE ALSO
       svgalib(7),    vgagl(7),	   libvga.config(5),	fun(6),	   vgatest(6),
       vga_claimvideomemory(3),	 vga_getgraphmem(3), vga_modeinfo(3), vga_set-
       page(3),	vga_setwritepage(3), vga_setlinearaddressing(3)

AUTHOR
       This manual page	was edited by Michael Weller  <eowmob@exp-math.uni-es-
       sen.de>.	 The exact source of the referenced function as	well as	of the
       original	documentation is unknown.

       It is very likely that both are at least	to some	extent are due to Harm
       Hanemaayer <H.Hanemaayer@inter.nl.net>.

       Occasionally  this  might be wrong. I hereby asked to be	excused	by the
       original	author and will	happily	accept any additions or	corrections to
       this first version of the svgalib manual.

Svgalib	(>= 1.2.11)		 27 July 1997		    vga_setreadpage(3)

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | AUTHOR

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