|
include vdmad.inc VxDcall VDMAD_Disable_Translation |
The VDMAD_Disable_Translation service disables the automatic translation done for the standard DMA channels. It is necessary if a V86 application or driver, or a PM application uses the DMA services through Interrupt 4Bh to determine actual physical addresses for DMA transfers. A disable count is maintained, so a matching call to VDMAD_Enable_Translation is required for each call to this service to re-enable translation.
EAX
Specifies the DMA handle.
EBX
Specifies the virtual machine handle.
The carry flag is clear if automatic translation is disabled for the channel. Otherwise, the carry flag is set if the disable count overflowed.
Flags