On Wed, Apr 02, 2008 at 18:09:32 +0000, Matthew Saltzman <mjs@xxxxxxxxxxx> wrote: > > Column 1: 'C' indicated a comment line, ' ' a code line. > > Column 2-6: Statement label numbers. These were arbitrary numbers used You forgot the continuation column, which I believe was column 6. A 0 or blank signified a new statement, other characters signified a continuation of the previous statement.