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OpenVMS Hobbyist Program | Alpha Systems Forums | FreeAXP
Author Come a long way since the ES40 emulator!
astrodanco
Member

Posts: 36
Joined: 04.03.10
Posted on March 30 2010 06:15
This is pretty cool. I have OpenVMS VAX 7.3 running under SIMH clustered with OpenVMS Alpha 8.3 running under FreeAXP. I'm using bridged TAP network adapters for each of them. DECnet, TCP/IP, LAT, cluster comms all seem to work fine so far.

BTW, I notice that FreeAXP can also mount SIMH disks, so I gather they use the same simple container format. (Of course, I don't do that while they're also mounted via clustering I know what havoc that would cause.)

FreeAXP reports about 198 EUP while pegging one processor at 100% on my 4GHz Core I7. If one EUP is honestly 700K instructions per second, then that's about 138M instructions per second. Not exactly the supposed 166M of the real thing, but not bad. However, I did give up on having TCPIP$CONFIG generate an SSH key. I didn't want to wait for it...

A VAX under SIMH can have 512M of memory, but a poor Alpha under FreeAXP is limited to a measly 128M. I gather it's going to be doing a lot of paging.

SIMH can detect when VMS is idle when emulating a VAX, but I gather FreeAXP cannot do so when emulating an Alpha. I seem to recall dim memories of idle being totally different between VAX and Alpha (or was that an even earlier VMS internals change that I'm dimly recalling)? FreeAXP constantly pegs one processor at 100% usage, even when idle. Can anything be done about that?
Author RE: Come a long way since the ES40 emulator!
Bruce Claremont
Moderator

Posts: 502
Joined: 07.01.10
Posted on April 01 2010 08:55
Nice set up. Thanks for posting it.

No plans for an idle loop at the moment. You can knock the freeaxp.exe priority down belownormal without bothering it.

Now if someone had an idle loop driver and code we could integrate...
Edited by Bruce Claremont on April 01 2010 08:58
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basilh
June 05 2018
Any other forum members in Perth, Australia?

LouF91
April 05 2018
ah maybe they love that!

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!

pintero
March 16 2017
peteherrera. Agreed.

peteherrera
March 04 2017
It would be nice to be able to buy the lastest hardcopy full OpenVMS docset at a very reduced price through the Hobbyist program. smiley

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