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include vdmad.inc VxDcall VDMAD_Unlock_DMA_Region |
The VDMAD_Unlock_DMA_Region service unlocks the DMA region previously locked to a channel. It is called after a DMA transfer is complete and the channel has been masked, preventing the controller from attempting any further transfers to the programmed address.
ESI
Specifies the linear address of the actual DMA region.
ECX
Specifies the number of bytes in the DMA region.
The carry flag is clear if the memory is unlocked. Otherwise, the carry flag is set to indicate an error.
Flags