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OpenVMS Hobbyist Program | Alpha Systems Forums | Alpha Software Forum
Author Alpha system binary code compatibility
markd833
Member

Posts: 2
Joined: 27.02.11
Posted on February 27 2011 07:23
Hi all,

I'm not familiar with the DEC Alpha systems - my knowledge only stretches to tinkering with a MicroVAX 3100-80 system running VMS 5.5, so hopefully one of you may be able to enlighten me.

I've got a custom software application (no source code available smiley) that was originally hosted on an AlphaStation 600 (5/266) with a graphics card fitted. I know that the AlphaStation 600 CPU was a 21164 (EV5). Would this code run on a newer processor/system such as a DS10 (21264 EV6) or DS20E (21264A EV67) without recompilation?

The application also originally ran under a version of DEC UNIX and also used a GUI to interact with it. How compatible would the newer hardware be - assuming, of course, I could get my hands on real hardware?

Thanks for your time,
Regards,
Mark.
Author RE: Alpha system binary code compatibility
malmberg
Moderator

Posts: 443
Joined: 15.04.08
Posted on February 27 2011 09:38
Unless the code is calling privileged code directly, generally it will work on newer versions of hardware and the OS.
Author RE: Alpha system binary code compatibility
markd833
Member

Posts: 2
Joined: 27.02.11
Posted on February 27 2011 10:25
Thanks for the quick reply. As the application is essentially an image editor - so disk i/o and interaction with a GUI, I don't see why it should be hardware specific.

My main worry was the graphics. My DEC experience is limited to machines that you interacted with via a VT100 terminal.
Author RE: Alpha system binary code compatibility
imiller
Administrator

User Avatar

Posts: 277
Location: UK
Joined: 24.02.06
Posted on February 28 2011 06:11
The later generations of Alpha CPU have additional instructions and faculties. Your application may not be optimal on a later CPU but it should run.
http://www.encompasserve.org/~miller/
Author RE: Alpha system binary code compatibility
abrsvc
Member

Posts: 91
Joined: 12.03.10
Posted on March 01 2011 05:21
Unless the application was compiled with a specific hardware type specified in the compilation line, the code is likely to be the "generic" alpha code which is the least common denominator code for all alpha architectures. Your code should run without any problems, it just won't take advantage of any of the newer optimizations.

Dan
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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

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Bitcoin and Blockchain enthusiasts ( plus distributed computing ) please connec / reply: http://www.openvmshobbyis
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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

malmberg
February 05 2017
Decus > Connect > Encompass<Country>

ChrisChiesa
February 02 2017
What's the status of DECUS memberships? Just found my membership card. :-)

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Searching for Pathworks 6.0 for DOS & Windows. Anyone have it?

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December 29 2016
The openvms disks question is frequently answered in the forums, and is not something to ask about in the shout box.

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December 29 2016
Hello, I am in need of the openvms.disk, but I don't know where to obtain it

moch75
December 26 2016
personal alpha

moch75
December 24 2016
personal alpha+

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