Introduction to Virtual Device Drivers



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VXDS
VM_Critical_Init

This is the second message the virtual device receives when a new virtual device is created. The virtual device can set the carry flag and return to prevent the virtual machine from being created. Interrupts are disabled and the Simulate_Int and Exec_Int services are not available.

VM_Init

This is the third message the virtual device receives when a new virtual device is created. The virtual device should initialize the state of the hardware and software in the virtual machine. For example, the virtual display device executes an Interrupt 10h function to set the initial display mode.


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