INT 31 - CauseWay - "SetDOSTrans" - SET DOS TRANSFER BUFFER

	AX = FF26h
	BX = real-mode segment of new transfer buffer
	ECX = new transfer buffer size
	DX = protected-mode selector for new transfer buffer
Return: nothing
Note:	the specific buffer must be located in conventional memory; only the
	  first 64K will be used
SeeAlso: AX=FF25h