7 Jun
2011
7 Jun
'11
6:33 p.m.
On 6/7/11 7:54 PM, Randy Dawson wrote:
I built this too a couple months ago, using gcc in
fortran mode.
Neat! Wow, I'm shocked that GNU FORTRAN could digest that ancient
FORTRAN IV code! Did you have to change much in the source?
My efforts ended up with a single JCL file containing the FORTRAN and
assembler sources and three jobsteps that result in an executable.
Kinda neat to encapsulate it all that way. (speaking from the standpoint
of a 25-year UNIX veteran, that is)
Only problem I had was the 'time' function to
measure the simulation
run time. Its not in the gcc intrinsic lib, so I just stubbed it
out.
"When in doubt, comment it out!" ;)
The time-related stuff is what choked it for me as well, initially.
The assembler assists use DIAGNOSE 00C to get the TOD clock values,
which assembles just fine of course, but very quickly results in an
ABEND when run under MVS. ;)
I hadn't really gone through the assembler sources when I first got
it built but it wouldn't run. I figured I'd need to understand the
FORTRAN<->assembler linkage stuff to debug it, so I went off in that
direction. It was then that I was able to decipher enough of the two
offending functions (SECOND and DATIME) to notice the DIAGNOSE calls,
and said, "ahh, this is for VM/CMS!" I had thought it was an MVS
program all along. I've used SPICE for years, but only under UNIX, and
never the old FORTRAN version.
My version was 2g.6
That's the one I'm working with as well. It's the last of the SPICE 2
line, as far as I'm aware.
Fun stuff!
-Dave
--
Dave McGuire
Port Charlotte, FL