INT 61 - Atari Portfolio - PRESET/GET PERIPHERAL DATA                           
	AH = 1Ch
	AL = function
	    00h preset data values
		BL = data value
		DX = I/O address
	    01h get data values
	BH = table entry number (04h-09h)
Return: if function 01h
	    BL = data value
	    DX = I/O address
Desc:	preset peripheral I/O data in a table mapping I/O addresses to data
	  values; function 00h additionally outputs the data value to the
	  I/O port
SeeAlso: AH=1Ah"Portfolio",AH=1Bh"Portfolio",AH=1Eh"Portfolio"