INT 15 - later PSIBM PS/2, any model/2s - RETURN ENTIRE DDT
	AX = D103h
	DX = 0000h (reserved, must be set to 0)
	ES:DI -> buffer to contain DDT entry (see #00535)
Return: AH = return code (see #00534)
	CF set on error
	CF clear on success
	    ES:DI buffer filled with DDT entry
SeeAlso: AH=C0h,AH=C7h,AH=C9h,AX=D100h,AX=D104h