[Àû¿ë´ë»ó: DOSBox-x]

VGA Memory I/O delay in nanoseconds.
Set to -1 to use default, 0 to disable.
Default off.

Enable this option (-1 or nonzero) if you are running a game or demo that needs slower VGA memory (like that of older ISA hardware) to work properly.

If your game is not sensitive to VGA RAM I/O speed, then turning on this option will do nothing but cause a significant drop in frame rate which is probably not what you want.

Recommended values -1, 0 to 2000.
