[Q]: ��� y�����, � FS �� DOS-����?

[A]: Alexander Perezhogin (2:5007/2.1)

INT 2F C - OS/2 compatibility box - SWITCHING DOS TO BACKGROUND

AX = 4001h
Note: called by OS/2 when the DOS box is about to be placed in the
background and the video driver should save any necessary state
SeeAlso: AX=4002h,AX=4005h

INT 2F C - OS/2 compatibility box - SWITCHING DOS TO FOREGROUND

AX = 4002h
Note: called by OS/2 when the DOS box is about to be placed in the
foreground and the video driver should restore the previously-saved
state
SeeAlso: AX=4001h,AX=4006h

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