Int 4B/AX=8107h

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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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