VDMAD_Unvirtualize_Channel

include vdmad.inc

mov eax, DMA_Handle
VxDcall VDMAD_Unvirtualize_Channel
jc error

Allows a VxD to release its virtualization of a standard DMA channel. The previously registered callback procedure will not be called again. The channel is available for virtualization by other VxDs. VDMAD will continue to trap the I/O for the channel, but will not change the physical state of the channel as a result of any VM I/O. Uses EAX, EDX, Flags

• Clears the carry flag if successful. Sets the carry flag if the DMA_Handle is invalid.

DMA_Handle

Handle of the DMA.