
VGA window has the following restrictions.
* Color palettes are common with the base screen. So, if any color
palette is changed in the base screen or the VGA window, the
corresponding color palette of the other screen is changed.
* The control of graphic display enabling/disabling is common with the
base screen. So, if the graphic display is disabled in the base screen,
the contents of graphics in the VGA window are disabled at the same time.
* VGA window is available on only 16-color mode, unavailable on 256-color
mode. While the following modes are specified in "_setvideomode()"
function, VGA window is unavailable.
_98RES16COLOR, _98RES8COLOR, _98RESCOLOR ,_VRES256COLOR
* Size and position of VGA window are specified by character size unit.
* VGA window size (colomn x line) is limited as follows.
Total size of all opened windows <= Full screen size
* When the screen mode is changed, all VGA windows are closed auto-
matically.
* The VGA window cannot be used together with the CNC subscreen/help
screen. To use the VGA window, set parameter NSH(No.8654#0)=1 to
hide the subscreen/help screen.
* If the VGA window is used, it is impossible to use the debug function
of the macro compiler/executor. Set parameter DBG(No.8502#3)=0.