Interrupt 2Fh Function 4004h

mov ax, 4004h       ; Exit Critical Section
int 2fh
 

Exit Critical Section notifies the virtual-display device that a VM application has completed a critical section and can now respond to Save Video Register State (Interrupt 2Fh Function 4005h).

A VM application calls this function when it has completed critical section processing.

This function has no parameters.

This function has no return value.

Calls to Exit Critical Section not preceded by a corresponding call to Enter Critical Section (Interrupt 2Fh Function 4003h) are ignored.

See Also

Interrupt 2Fh Function 4003h Enter Critical Section,
Interrupt 2Fh Function 4005h Save Video Register State