>> VMASK = 0x14 # 00011000 > > Whoops, a typo I think. VMASK = 0x18 #00011000 > or VMASK = 0x14 #00010100 A typo is being kind. A mistake in reality, that's what happens when I don't have a Python session handy! :-) Fortunately Terry knew what I meant. Alan G.