info-vax@ucbvax.ARPA (02/20/85)
From: lionel%eiffel.DEC@decwrl.ARPA (Steve Lionel) MicroVMS V1.0 is a repackaged version of VAX/VMS X2M9, which was the second field test version of VMS V4.0. MicroVMS V4.0 (there were no V2 nor V3) is exactly VAX/VMS V4.0, repackaged. By repackaging I mean that some files that are not relevant to MicroVAXen (for example, MASSBUS drivers) are not present, some command files have been added or modified to make it easier to use and the help is reorganized somewhat. Basically what you give up is full VMS' ability to take a VMS pack and run it on any VAX processor, in exchange for a much smaller and cheaper system. Also, you buy various parts of the system separately, so if you don't need DECnet, you need not buy it. Yes, patches for VMS V4.0 will work on MicroVMS V4.0.