On Apr 9, 2026, at 9:32 AM, Dave McGuire <mcguire@neurotica.com> wrote:


 Reading it now.  Thanks!

        -Dave

On 4/9/26 10:31, Johnny Billquist wrote:
OTS manual, chapter 12.
  Johnny
On 09/04/2026 16.29, Dave McGuire wrote:

   Damn, I was unaware of that.  Hitting the docs now.  Thank you Johnny.

            -Dave

On 4/9/26 09:32, Johnny Billquist wrote:
Don't matter if any FP instructions are in the code or not. A couple of setup instructions are in the RTS initialization, unless you link with a version of the F77 library intended for code without FP.

The information on how to create a library that don't use FP is in the F77 manuals...

   Johnny

On 09/04/2026 15.24, Dave McGuire wrote:

   /me slaps forehead

   The 11/70's FP board set is flaky, and it has been removed pending repair.  I had forgotten about that.  But the "hello world"program shouldn't use any FP instructions..?

   I don't think I can get over to LSSM today, but I will be working there tomorrow.

             -Dave

On 4/8/26 19:59, Johnny Billquist wrote:
Error 2, by the way is usually for one of three reasons:

1. Task failed at the SVTK$S call (not able to install trap catching for various traps)
2. Task uses FP instructions, but task was build without /FP, or system lacks FP hardware support.
3. FCS initialization failure.


Most likely problem would be #2.

   Johnny

On 2026-04-08 22:23, Dave McGuire wrote:

   Hey folks, before I start digging into this, I figuredI'd ask here. A simple "hello world" program in F77 on RSX-11M-PLUS fails to start thusly:

$ run hello
TT3  --  Exiting due to ERROR 2
Task initialization failure

   I was trying to move a larger FORTRAN program to this system (the 11/70 at LSSM) and it was dying with this message, so I wrote a quickie test case to narrow it down.  It's just a write to unit 5:

         WRITE(5,10)
10      FORMAT(' Hello World!')
         END

...compiled with "FORTRAN HELLO", and linked with:

L HELLO,LB:[1,1]F77FCS/LIB

   No warnings or errors.  It runs fine on my 11/83 athome with a very similar config.  Before I dig in, can anyone quickly point me to what I'm missing?

          Thanks,
          -Dave





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--
Dave McGuire, AK4HZ
New Kensington, PA
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