Interrupt 2Fh Function 4007h

mov ax, 4007h ; Disable VM-Assisted Save/Restore

int 2fh

Disable VM-Assisted Save/Restore directs the virtual-display device (VDD) to discontinue notifying the VM application when it needs access to video registers.

VM applications call this function when they terminate.

Parameters

This function has no parameters.

Return Value

This function has no return value.

Comments

This function directs the VDD to restore I/O trapping of unreadable registers and to discontinue calling Save Video Register State and Restore Video Register State (Interrupt 2Fh Functions 4005h and 4006h) when it needs access to the registers. Furthermore, the VDD ignores any subsequent calls to Enter Critical Section and Exit Critical Section (Interrupt 2Fh Functions 4003h and 4004h).

This function does not disable Notify Background Switch and Notify Foreground Switch (Interrupt 2Fh Functions 4001h and 4002h).