Int 4B Fn 8108  - Virtual Dma Specification - Release Dma Bufffer          [d]

   AX = 8108h
   DX = flags
       bit 0: reserved (zero)
       bit 1: data should be copied out of buffer
       bits 2-15 reserved (zero)
   ES:DI -> DMA descriptor structure (see AX=8102h) with buffer ID set
       (also region size/region offset/segment if DX bit 1 set)

Return: CF clear if successful
   CF set on error
       AL = error code (see AX=8102h)
BUG:   under Windows 3.0 Enhanced mode, you must specify that data be copied
     for this function to work correctly

See Also: AX=8107h