Have a hex value of 6bf 0110 | 1011 | 1111

What you really have is 

6b f0

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I've looked at "pack/unpack" but cannot figure it out.

Show your efforts. Usually, pack/unpack aren't used for flipping bits, you use & or | for that, see perlop

Your title hints what you really are talking about is 

$ perl -le " print unpack 'H*', pack 'h*', '6bf';
b60f

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or 
$ perl -le " print join ' ', split /(....)/, unpack 'b*', pack 'h*', '
+6bf';
 0110  1101  1111  0000

$ perl -le " print join ' ', split /(....)/, unpack 'B*', pack 'h*', '
+6bf';
 1011  0110  0000  1111

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In reply to Re: LSB to MSB by Anonymous Monk
in thread LSB to MSB by Anonymous Monk

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