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HP OpenVMS Systemsask the wizard |
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The Question is: Dear Sir, I have an application developed on Alpha 4100 5/400 with OpenVMS 6.2 operationg system, now I want to upgrade our system and I heard about ES40(6/500) , Alpha 4100 5/600 and 5/533, can I order an ES40 without modifiying our application, if not, can we order alpha 4100 5/600 or alpha4100 5/533? Which system can run OpenVMS 6.2 ? Thanks JInjiang Ren July 21, 1999 The Answer is : All systems based on the Alpha 21264 microprocessor require a minimum of OpenVMS Alpha V7.1-2, or potentially V7.2-1 or later. OpenVMS is expected to be upward compatible (for non-privileged-mode applications) for existing executables, and correct code built for 21064 and 21164 Alpha microprocessor systems is expected to operate on 21265 systems. Privileged-mode code (executive or kernel) can require recompilation and rebuild, or rework. Code built with older compilers will not issue instructions as efficiently as code built with more recent tools, but will function correctly. No recompilation or rebuilding is required. Recompilation and rebuilding with more recent tools and compilers can improve performance. For information on one (incorrect) code construct that can cause problems with code executing on 21264 systems, please see the 21264 directory on the OpenVMS Freeware V4.0 website and the OpenVMS Freeware V4.0 CD-ROM media. If there are latent bugs in the code, there is no way to predict the outcome -- please see the discussion around "Debugging synchronization problems? (SMP)" and "Shared memory and Alpha memory barriers (MB)?" here in Ask the Wizard for details on common problems and techniques for ensuring correct synchronization. For related information and discussions, please see topics including (2738), (2932), (6829), and particularly please see topic (7555). Related topics include (173), (866), (1052), (1171), (1904), (2738), (2932), (4336), and (6049).
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