Category: <b>BIOS</b>
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<pre><b>INT 15 - later PS/2s - RETURN DEVICE DESCRIPTOR TABLE (DDT) ENTRY BY I/O ADDRSS</b>

	AX = D102h
	BX = entry number at which to start searching
	CX = requested I/O port address
	DX = 0000h (reserved, must be set to 0)
	ES:DI -&gt; buffer to contain DDT entry (see <a href=../../it/35/5.html>#00535</a>)
Return: AH = return code (see <a href=../../it/34/5.html>#00534</a>)
	BX = DDT entry number where I/O port was found, or total entries
	     plus 1 if port was not found.
	CF set on error
	CF clear on success
	    ES:DI buffer filled with DDT entry
Desc:	the DDT is searched from the specified entry for the I/O port in CX,
	  and the first entry in which it is found is returned
SeeAlso: AH=C0h,AH=C7h,AH=C9h,AX=D100h,AX=D101h,AX=D103h,AX=D104h
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