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include vdmad.inc VxDcall VDMAD_Copy_From_Buffer |
The VDMAD_Copy_From_Buffer service allows another device to copy data from the VDMAD buffer to the actual DMA region associated with the buffer. This service is called after the VDMAD_Request_Buffer service, after a memory write transfer and before the VDMAD_Release_Buffer service.
EBX
Specifies the buffer identifier.
ESI
Specifies the region linear.
EDI
Specifies the offset within the buffer to the start of copying.
ECX
Specifies the size of the buffer.
The carry flag is clear if the data is copied from buffer into DMA region. Otherwise, the carry flag is set and the AL register contains one of the following error values:
| Value | Meaning |
| 0Ah | DMA_Invalid_Buffer: invalid buffer ID supplied. |
| 0Bh | DMA_Copy_Out_Range: (ESI + ECX) is greater than buffer size. |
EAX, Flags