Could the writeln issue, be a link time and not compile time? I remember having 
to specify the Pascal runtime libraries (more than one?) at link time.


> On Feb 8, 2018, at 7:51 AM, Gary Lee Phillips <> wrote:
> VMS Pascal conforms to the language standards. So does Turbo Pascal, if the 
> code is written to standard.
> The problem with porting in Pascal comes when language extensions are used. 
> These are often proprietary and/or hardware specific. On OpenVMS much of the 
> extended capability depends on calling system libraries, all of which are 
> supported. Turbo Pascal was designed specifically for the IBM PC and 
> "compatible" systems, and contains a lot of proprietary extensions that will 
> not be recognized by VMS Pascal's compiler.
> If your code depends on graphic functions, the ones in Turbo Pascal are 
> almost entirely peculiar to that environment and will require a lot of 
> rewriting. These use custom libraries that come with the compiler, and 
> probably most can be duplicated by using OpenVMS system calls in some format. 
> Some analysis will be required to identify the hardware specific code and 
> select appropriate substitutions.
> As for "free pascal" there are several incompatible implementations that go 
> by the name, so I'm not sure what you have used. However, all of them pretty 
> much support the original language definition and code that stays within that 
> standard definition will work without translation. Extensions that use 
> library calls or custom units are going to be the area that requires 
> (possibly a lot of) work.
> The full VMS Pascal manuals are available in PDF form online and you should 
> begin there. 
> By the way, VMS Pascal definitely supports writeln. It also has record 
> structures, etc. Those are all part of the standard language definition. We'd 
> need to see a sample of your code that doesn't work in order to figure out 
> where your problem comes from.
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