The II+ ROMs are similar to 2716 EPROMs except that pin 18 (CS2) is active high, unlike the other chip select lines, which are active low. Tying pin 18 to +5V is one way around it for copying purposes... Regds, Peter M. -- Peter Maloney MSCMALO@SYDVM1.vnet.ibm.com (Work) peterm@ausom.oz.au (Home)