COBOL: EBCDIC File Formats

I had some file formats I had to import into a database for work and it was in a strange format I had never seen before.

05 RECORD1-RAW                          PIC X(17).
05 RECORD1-AREA REDEFINES RECORD1-RAW
   10     REC2-RAW                     PIC 9(9).
   10     REC2-AREA REDEFINES REC2-RAW
       15      REC3-F1                 PIC X(3).
       15      REC3-F2                 PIC X(2).
       15      REC3-F3                 PIC X(4).
   10     REC2-FOOTER                  PIC S9(6)V99.

I saw the word EBCDIC, and I was clued in that I was not using ASCII. I read somewhere that Mac still uses EBCDIC.

http://www.natural-innovations.com/computing/asciiebcdic.html is Google's top link for EBCDIC. But here is a cleaner looking table comparing ascii and ebcdic: http://www.simotime.com/asc2ebc1.htm

Wikipedia's link: http://en.wikipedia.org/wiki/EBCDIC

But what finally helped was when I found: http://www.discinterchange.com/reading_COBOL_layouts_.html

and then used http://www.discinterchange.com/TechTalk_signed_fields_.html to figure out signed fields like above.