VSI BASIC V1.11-1 for OpenVMS x86-64 Systems
                            Release Notes

                            8 October 2025







     Copyright 2025 Hewlett-Packard Development Company, L.P.

     Copyright 2025 VMS Software, Inc.

     HP CONFIDENTIAL.  This software is confidential  proprietary
     software licensed by Hewlett Packard Enterprise Development,
     LP,  and  is  not  authorized  to  be  used,  duplicated  or
     disclosed  to anyone without the prior written permission of
     HPE.

     VMS  SOFTWARE,  INC.   CONFIDENTIAL.    This   software   is
     confidential  proprietary software licensed by VMS Software,
     Inc., and is  not  authorized  to  be  used,  duplicated  or
     disclosed  to anyone without the prior written permission of
     VMS Software, Inc.

     This document contains information about VSI  BASIC  V1.11-1
     including  new  and  changed  features,  differences between
     V1.11-1 and previous  versions,  corrections  included,  and
     other  topics.   This  file  is  of  interest to both system
     managers and application programmers.



                                   CONTENTS



CHAPTER 1       VSI BASIC V1.11-1 FOR OPENVMS X86-64 SYSTEMS RELEASE 
                NOTES

        1.1     Overview Of VSI BASIC  . . . . . . . . . . . . . . 1-1
        1.2     VSI BASIC Documentation  . . . . . . . . . . . . . 1-1
        1.3     VSI BASIC For X86-64 Systems Known Issues  . . . . 1-1
        1.4     Problems Corrected Since VSI BASIC V1.10 . . . . . 1-2











































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                              CHAPTER 1

      VSI BASIC V1.11-1 FOR OPENVMS X86-64 SYSTEMS RELEASE NOTES



1.1  Overview Of VSI BASIC

VSI BASIC V1.11-1 a release of BASIC on OpenVMS x86-64.  It  is  based
on  VSI  BASIC  on OpenVMS I64 for source compatibility.  There may be
platform-specific features from OpenVMS Alpha and OpenVMS I64 that may
not be supported.

The compiler requires OpenVMS x86-64 version 9.2-3 or later.


The BASIC/VERSION string is:

         VSI BASIC V1.11-1 (GEM 50nnn) on OpenVMS x86-64 Systems




1.2  VSI BASIC Documentation

The   VSI   BASIC   documentation   set    on    the    VSI    website
(docs.vmssoftware.com)  has  not yet been updated with x86-64 support.
It will be updated in the next several months.



1.3  VSI BASIC For X86-64 Systems Known Issues


      -  The   /MACHINE_CODE   qualifier   is   ignored.    Use    the
         ANALYZE/OBJECT/DISASSEMBLE  command  to product a list of the
         machine code instructions generated by the compiler.

      -  The /SEPARATE_COMPILATION  qualifier  is  ignored.   We  will
         investigating  how  to  implement  this feature with the LLVM
         code generator.




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      VSI BASIC V1.11-1 FOR OPENVMS X86-64 SYSTEMS RELEASE NOTES


      -  XFLOAT floating is not currently  supported  due  to  missing
         support  in  the  BASIC  RTL, the Math RTL, and in conversion
         routines in LIBRTL.EXE.  All of this will be  provided  in  a
         future release.

      -  The compiler does not produce a warning on  decimal  overflow
         in an initializer.

      -  The compiler has much improved debug information compared  to
         the  V1.10  release.   In  addition,  the debugger in OpenVMS
         V9.2-3 update 2 contains additional fixes for BASIC.




1.4  Problems Corrected Since VSI BASIC V1.10



      o  The compiler now correctly parses XFLOAT  literals.   However
         XFLOAT  support is only partially working as many of the RTLs
         on the system to read/write XFLOATs do not yet support  these
         128-bit long double floating types.

      o  The optimizer would cause the compiler to generate  incorrect
         debug  information  for  tracebacks.  A traceback might print
         something like

         Error: traceback pc= 0000xxxx was not found

         This problem has been fixed.

      o  The debug information for  routine  prologues  and  epilogues
         have been improved for better debugging stepping

      o  Correctly detect and signal integer divide by zero errors.

      o  The  compiler  would  generate  invalid  DWARF  for   certain
         filenames  resulting in incorrect source line debugger.  This
         problem has been fixed.

      o  The  compiler  would  generate  invalid  DWARF   for   STRING
         variables.  This problem has been fixed.

      o  The compiler could run out of memory and ACCVIO if the  BASIC
         source  contain  a very large variable that is initialized at
         compile-time.  The problem has been fixed.

      o  The compiler create a memory leak when using the  WHEN  ERROR
         clause resulting in an ACCVIO.  This problem has been fixed.




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      VSI BASIC V1.11-1 FOR OPENVMS X86-64 SYSTEMS RELEASE NOTES


      o  Various  bugs  related  to  optimizations  found   by   other
         compilers are also included.




















































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