Simh has two executables for VAX emulation.
One can emulate either a VAXserver 3900 or a MicroVAX 3900. You can toggle between the two by editing the ROM. Instructions on how to do this are in the Simh FAQ but note that the procedure described uses the PDP11 emulator to do the ROM edit and not the VAX emulator.
The other VAX emulator bundled with Simh is the VAX-11/780. This can be modified to emulate a VAX-11/785 with a simple change to the code. In vax780_defs.h change the following line (near the top of the file) from:
#define VAX780_ECO (7 << 19)
#define VAX780_ECO (373 << 15)
and recompile. This will emulate a VAX-11/785 revision 14 F manufactured at NI (Salem FA&T)
I am currently modifying Simh to emulate a few different models of VAX. These may not be completed anytime soon as I don't have much time to work on them at the moment. They are:
MicroVAX II - 90% complete. Can boot OpenVMS in minimum startup mode only. NetBSD seems to work OK.
MicroVAX 2000 - 50% complete. Can run to console prompt only. Not booted yet.
VAX-11/730 - 20% complete. Can boot to OpenVMS banner then hangs.
Hopefully I will get round to releasing at least the MicroVAX II at some point.
I started with the MicroVAX II because it was not too far removed from the MicroVAX 3900 and therefore was quite good for a starting project. Likewise with the 11/730, I am using the 11/780 as a starting point.
The MicroVAX 2000 however is a bit more complicated but I think it will provide a stepping stone to the 3100 series and then possibly to the 4000s.
I'm posting this here for the benefit of those who do not follow the Simh mailing list.
It's been a long time since my last post but a lot of progress has been made. All 3 of the emulators mentioned above are available for download on my website (www.9track.net). They are Win32 binaries for now although the source is available for the 11/730.
malmberg June 26 2018 https://www.openvmshobbyi st.com/forum/viewthread.p hp?forum_id=10&thread_id= 2363
bhamakripa June 24 2018 I am trying OpenVMS via SIMH. Need to get OS binaries for v7.3. Registered here but don't have any membership number yet which is needed to get license. Pls suggest what to do. I hardly know anyth
basilh June 05 2018 Any other forum members in Perth, Australia?
malmberg March 24 2018 Probably. More people hang out on the comp.os.vms newsgroup.
vaxpert March 23 2018 I have a PE42A and other Alpha system stuff for sale. I'm in So California. Any interest out there?
goodbyespy February 27 2018 To Prohorenko. Please, visit group OpenVMS in the ok.ru
peteherrera February 24 2018 How much does it cost to buy a complete OpenVMS hardcopy documentation set of the latest version
prohorenko February 17 2018 Please help to obtain the license on OpenVMS
malmberg December 12 2017 HPE only makes the most current version of OpenVMS Alpha / IA64 /VAX available to hobbyists. When I had access to the Alliance 1 program it was the same. No public downloads are allowed by HPE.
nmbonao December 08 2017 Is anybody knows OpenVMS 8.2 version downloadable version? or CD copy? Thank you very much
aarommes December 02 2017 Bitcoin and Blockchain enthusiasts ( plus distributed computing ) please connec / reply: http://www.openvmshobbyis t.com/forum/viewthread.ph p?forum_id=130&thread_id= 2991
malmberg September 10 2017 https://sourceforge.net/p /vms-ports/wiki/VMSInstal lation/ For the most part just use VMS 6.1 media instead of 7.3. But why run the older release?
DoeveR August 07 2017 Where can I find the write up on running VMS 6.1 using the simh emulator?
Bart March 20 2017 Happy to have found my password again!