INT 15 - later PSIBM PS/2, any model/2s - RETURN DEVICE DESCRIPTOR TABLE (DDT) ENTRY BY I/O ADDRSS 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 -> buffer to contain DDT entry (see #00535) Return: AH = return code (see #00534) 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