I have to assume since the SE/30 is basically a modified IIx, that the GLU chip in the SE/30 that is detailed here is similar or identical to the one in the II? Except the two had a MMU chip which was connected between the 68020 and the address bus connected to the ram. The IIx and Se/30 didn't since they have a built in MMU. It looks like some of the strobe signals are generated by the GLU though for the SE/30....RAS is Row address strobe and CASLL/UM/LM/UU are Column address strobes. This may get me what I need!! The IPL0-2 pins are indeed routed to the GLU, so this chip DOES have some part in the interrupt mechanism (at least in the IIX and SE/30).