INT 31 - DOS32 v3.0+ - ALLOCATE 16KB DMAsee Direct Memory Access BLOCK
AX = EE41h
Return: CF clear if successful
EBX -> 16KB DMAsee Direct Memory Access block (physical address)
EDX -> 16KB DMAsee Direct Memory Access block (offset address)
CF set on error
SeeAlso: AX=EE40h,AX=EE42h