ID Number: Q70669
5.10 6.00 6.00a 6.00ax 7.00
MS-DOS
Summary:
In Microsoft C versions 5.0, 5.1, 6.0, 6.0a, 6.0ax, and 7.0, the
functions _setactivepage() and _setvisualpage() from GRAPHICS.LIB can
be used to change which portion of the video memory is being used.
These two functions can be used in both text and graphics video modes.
However, in a CGA graphics mode you are limited to one video page
because the design of the original CGA adapter supports only one page
in graphics mode.
This holds true even if your system has a newer graphics adapter, such
as an EGA or VGA, which contains more video memory. Calling the
function _getvideoconfig() correctly indicates that only one video
page is available when set to any of the CGA graphics modes, because
emulating a CGA graphics mode includes the 16K limit to video memory.
Additional reference words: 5.00 5.10 6.00 6.00a 6.00ax 7.00