The amount of physical pages supported by VAX/VMS depends on the hardware. Simh emulates a VAX(server) 3900 IIRC and you ll find information here: http://www.compaq.com/alphaserver/vax/archive/mv3800.html Apparently the 3800/3900 support 64 MB max. You also need to change the SYSGEN parameter PHYSICAL_PAGES, this is not done by AUTOGEN. Oleg suggested another .bin file that might work though IIRC it was intended to support a microVAX 3900 instead of the server model so that VMS would load with a A license. Most users don t have a B license to satisfy LMF. Hans Van: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] Namens Sampsa Laine Verzonden: zondag, november 2010 21:20 Aan: hecnet at Update.UU.SE Onderwerp: [HECnet] SIMH VAX memory weirdness I just increased the memory on one of my SIMH VAX VM's to 512 MB from 64 MB - the system boots fine but SHOW MEMORY (under OpenVMS 7.3-1) still reports 64 MB. Do I need to tell the VMS installation about the new RAM somehow? How much RAM does 7.3-1 (VAX) support anyway? Sampsa Geen virus gevonden in dit bericht. Gecontroleerd door AVG - www.avg.com Versie: 10.0.1170 / Virusdatabase: 426/3285 - datum van uitgifte: 11/28/10