use_virtual_scratch_files@ available for ftn95?

Hello,

in Salford's ftn77 environment there was a call to enable or disable the virtual scratch file facility, namely

use_virtual_scratch_files@ 

. If the virtual scratch file facility was enabled, files opened with STATUS='SCRATCH' were never written to disk but held in virtual memory.

Now, I could not find use_virtual_scratch_files@ in Salford's ftn95 compile environment.

Hence I would like to know, if the virtual scratch file facility is available under ftn95, and if so, by which call I would enable or disable it.

Thanks, Dietmar

I can't find any reference to scratch files that are 'virtual'.

There are routines for mapping files to memory such as MAP_FILE_FOR_READ_WRITE@ but I have not looked up the details.

Paul,

It's in the FTN77 library manual, available on this website. If it never migrated from FTN77 to FTN95, and given that it seems so sensible, isn't there a case for resurrecting it?

Eddie

As most disk I/O is now buffered, why worry about virtual files; disk files would probably give similar performance.