Question about refresh rate in screenres?

[lassar]

I have been looking a screenres?

ScreenRes width, height, depth , num_pages , flags , refresh_rate

What is refresh used for, and how does it affect the speed of your program?

[monochromator]

In the current state of the graphics library for DOS now "refresh_rate" not affect anything and is assigned by default (50-70 Hz), depending on the used graphics mode.

In general, this option should affect the refresh rate of the monitor and the refresh rate of video memory by graphics library.

[MichaelW]

The refresh rate will affect the speed of your program if your program (or the graphics library) is syncing with the refresh (IOW waiting for vertical retrace). Ignoring some complicating details the higher the refresh rate the less time your program spends waiting.

[DOS386]

AFAIK the parameter has no effect in DOS (VESA 2.0 can't, VESA 3.0 maybe can ???).

http://www.freebasic.net/wiki/wikka.php ... gScreenres