=head1 NAME
-README.BS2000 - building and installing Perl for BS2000.
+perlbs2000 - building and installing Perl for BS2000.
+
+B<This document needs to be updated, but we don't know what it should say.
+Please email comments to L<perlbug@perl.org|mailto:perlbug@perl.org>.>
=head1 SYNOPSIS
Although one would expect the quantities $y and $z to be the same and equal
to 100000 they will differ and instead will be 0 and 100000 respectively.
+=head2 Using PerlIO and different encodings on ASCII and EBCDIC partitions
+
+Since version 5.8 Perl uses the new PerlIO on BS2000. This enables
+you using different encodings per IO channel. For example you may use
+
+ use Encode;
+ open($f, ">:encoding(ascii)", "test.ascii");
+ print $f "Hello World!\n";
+ open($f, ">:encoding(posix-bc)", "test.ebcdic");
+ print $f "Hello World!\n";
+ open($f, ">:encoding(latin1)", "test.latin1");
+ print $f "Hello World!\n";
+ open($f, ">:encoding(utf8)", "test.utf8");
+ print $f "Hello World!\n";
+
+to get two files containing "Hello World!\n" in ASCII, EBCDIC, ISO
+Latin-1 (in this example identical to ASCII) respective UTF-EBCDIC (in
+this example identical to normal EBCDIC). See the documentation of
+Encode::PerlIO for details.
+
+As the PerlIO layer uses raw IO internally, all this totally ignores
+the type of your filesystem (ASCII or EBCDIC) and the IO_CONVERSION
+environment variable. If you want to get the old behavior, that the
+BS2000 IO functions determine conversion depending on the filesystem
+PerlIO still is your friend. You use IO_CONVERSION as usual and tell
+Perl, that it should use the native IO layer:
+
+ export IO_CONVERSION=YES
+ export PERLIO=stdio
+
+Now your IO would be ASCII on ASCII partitions and EBCDIC on EBCDIC
+partitions. See the documentation of PerlIO (without C<Encode::>!)
+for further possibilities.
+
=head1 AUTHORS
Thomas Dorner
=head2 Mailing list
-If you are interested in the VM/ESA, z/OS (formerly known as OS/390)
+If you are interested in the z/OS (formerly known as OS/390)
and POSIX-BC (BS2000) ports of Perl then see the perl-mvs mailing list.
To subscribe, send an empty message to perl-mvs-subscribe@perl.org.
See also:
- http://lists.perl.org/showlist.cgi?name=perl-mvs
+ http://lists.perl.org/list/perl-mvs.html
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