HP OpenVMS Systems

OpenVMS Application Upward Compatibility?

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The Question is:

 
I support an Alpha V6.2 application written in
PASCAL.  The use of PASCAL pointers, and builtin
ADDRESS calls is extensive.  Would you expect
any problems when I upgrade to Alpha V7.1 ?
Also, are there release notes available on the
internet for the latest version of DEC PASCAL
for Alpha?
 
 

The Answer is :

 
  The OpenVMS operating system provides for upward compatibility of
  all properly written user-mode programs using documented interfaces.
 
  One of the pieces of the OpenVMS VAX regression test involves an
  executable image that was built on VAX/VMS V1.0.  It still works
  fine.
 
  A correctly written Pascal program that works on OpenVMS V6.2 should
  continue to work correctly on OpenVMS V7.1.
 

  

     

     
answer written or last revised on ( 5-MAR-1999 )
     
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