There is a module, Convert::IBM390, that supports various conversion functions for data to/from a mainframe. One is packeb: 

use Convert::IBM390 qw(packeb);
my $comp3 = packeb( 'p4', 240 );  #77 A  PIC S9(7) COMP-3.
print $comp3;
__END__
~~output~~
0x0000240c  (of course, in binary)

[download]

It works well, and handles negative values.

Good luck. -c

In reply to Re: Pack decimal possibility by chuckbutler
in thread Pack decimal possibility by mikeward61

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