[Simh] re. still unable to specify disks larger than 2 GB

[-demijohn-]

Sorry, forgot to mention ... running on linux (redhat 9)
on intel hardware ... I get the same results with 
rauser=2048 or greater.

>From what I can see, these sections of code (in sim_fio.c) are relevant:

             /* Optimized file open */

             FILE *sim_fopen (char *file, char *mode)
             {
             #if defined (VMS)
                 return fopen (file, mode, "ALQ=32", "DEQ=4096",
                        "MBF=6", "MBC=127", "FOP=cbt,tef",
"ROP=rah,wbh", "CTX=stm");
   ->       #elif defined (USE_INT64) && defined (USE_ADDR64) && defined (linux)
   ->              return fopen64 (file, mode);
             #else
                   return fopen (file, mode);
             #endif
}

The use of the VMS flag above has me puzzled .. I'm not sure if that was defined
or what it implies .. I'm trying to build the VAX/VMS emulator
obviously ... if VMS
is defined looks like it would prevent the fopen64 routine from being called. 
(I'm probably way off :)
 ...

            /* Linux */

  ->        #if defined (linux)
  ->        #define _SIM_IO_FSEEK_EXT_      1

  ->        int sim_fseek (FILE *st, t_addr xpos, int origin)
            {
  ->             return fseeko64 (st, xpos, origin);
            }

            #endif                                                  /*
end Linux with LFS */

--

  I'm not absolutely sure I explicity defined 'linux' so I'll try
that, otherwise,
not being a formally trained C programmer, not sure what I need to tweak.

Thx,

-JM

On 9/19/05, Galen Tackett <gtackett at yahoo.com> wrote:
> JM,
> 
> Did you tell us what the host environment is under which simh itself is
> running? Maybe I missed it.
> 
> I tried to get large disk support working on my simh Vax under OS X
> V10.3.9 but discovered that for OS X at least, some of the necessary
> code to handle this isn't yet present in simh.
> 
> The source file in question is sim_fio.c. At present (simh V3.4-0) it
> appears to support large disks only under OpenVMS Alpha, Unix on an
> Alpha, (I take it this means Tru64?), Linux, or windows. (Notice how I
> subtly put windows last and didn't capitalize it. :-) I haven't
> examined it closely enough to ensure that the proper code gets compiled
> in each of these cases, but under any other host environment it
> certainly looks like it will compile WITHOUT support for large disks.
> 
> It might be pretty easy to add this for systems that have inherent
> support for 64 bit file offsets, as OS X does. But I haven't tried so
> far.
> 
> Comments from any of the real simh hotshots?
> 
> Galen
> 
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