Int 4B/AX=8107h

Virtual DMA Specification - REQUEST DMA BUFFER

AX = 8107h
DX = flags
bit 0:
Reserved (zero)
bit 1:
Data should be copied into buffer
bits  2-15 reserved (zero).
ES:DI -> DMA descriptor structure (see #03221) with region size set
(also region offset and region segment if DX bit 1 set)

Return:
CF clear if successful
DDS physical address and buffer ID set
DDS region size filled with length of buffer
CF set on error
AL = error code (see #03218)

See Also: AX=8108h

Category: Disk I/O Enhancements - Int 4Bh - V

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