info-vax@ucbvax.ARPA (02/20/85)
From: Art Berggreen <ART@ACC>
I've heard (a couple of times) that the VMS V4.0 kernel and the
MICROVMS V1.0 kernel are exactly the same link image. Does anyone
know for certain that this is true? What about other system
software? Would a patch that is valid for V4.0 work on V1.0?
Art@ACC.ARPA
------info-vax@ucbvax.ARPA (02/20/85)
From: Jerry Leichter <Leichter@YALE.ARPA>
I've heard (a couple of times) that the VMS V4.0 kernel and the
MICROVMS V1.0 kernel are exactly the same link image. Does anyone
know for certain that this is true? What about other system
software? Would a patch that is valid for V4.0 work on V1.0?
Art@ACC.ARPA
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This is almost true. MicroVMS V1.0 is identical to the second field test
version of VMS V4.0, plus a couple of late patches. It is also quite obsolete
and should be replaced with...MicroVMS V4.0. (There were no MicroVMS V2.0 or
V3.0. V1.0 existed only because of a timing problem - there were delays in
getting VMS V4.0 out the door, and VMS V3.x would not run on a MicroVAX.)
MicroVMS V4.0 and VMS V4.0 are identical in all code not specific to particular
processors and I/O devices. The specialized code is all separated out - some
stuff that gets configured in at boot time, and various drivers. A MicroVMS
kit doesn't contain the drivers for Massbus devices, nor does it contain the
files with things like multi-processor (VAX 11/782) support (MP.EXE, I think).
This leaves essentially everything else - just about all of the system - the
same between the two.
Patches meant for VMS V4.0 should work on MicroVMS V4.0 (unless they try to
patch something that isn't there!). They WON'T work on MicroVMS V1.0 - but
then you really don't want to be running that any more.
-- Jerry
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