I made a mistake in the last posting. On a 4D70GT, if your VMEBus card supports A32 access, than all of physical memory can be accessed. The 8 Mb limitation applies to A24 accesses only. -- Jim Barton Silicon Graphics Computer Systems "UNIX: Live Free Or Die!" jmb at sgi.sgi.com, sgi!jmb at decwrl.dec.com, ...{decwrl,sun}!sgi!jmb