a $55 byte and continue with $0254 more #$55 bytes. 
      
      Example of Full RapidLok Data block:
      
      SYNC $0005 Bytes: 6B BB C9 24 BA FF 35 DF............ 
      
      Example of Empty RapidLok Data block:
      
      SYNC $0005 Bytes: 55 55 55 55 55 55 55 55............ 
      
      4) The RapidLok Bit Rate:
      
        As far as BIT RATES and storage sizes go, RapidLok formats 
      tracks in the following manners for the following zones:
      
          Track Zone    Bit-Rate    # of Sectors
      --------------------------------------------------------
           1-17           $60            12
          19-35           $40            11
      
      5) The RapidLok Extra-Sector
      
      After all the headers and data blocks for each sector of a track
      are written out, a special "extra-sector" is written on the disk as 
      part of the RapidLok's main protection scheme. The block has a SYNC
      LENGTH of $0014, and begins with a #$55 byte. The first byte is 
      followed by a certain number of #$7B bytes in a row, giving the 
      entire block a specific LENGTH. A special "decoder" master-key 
      block is written on track 36 of each RapidLok disk. At the 
      beginning BOOT of the program, RapidLok DOS moves the disk-drive 
      head to track 36, reads in the special key, decodes it and ends up 
      with a list of 35 numbers. Each number is the specific length of
      the EXTRA SECTOR for each equivalent track! During RapidLok file
      loads, if the DOS extra-sector length does not match the master-key 
      number for that track, the DOS dies. The MASTER-KEY on track 36 is 
      the most difficult portion of RapidLok formats to reproduce.
      
      Example of Extra-sector:
      
      SYNC $0014 Bytes: 55 7B 7B 7B 7B 7B.....7B (x amount of bytes)
      
      6) Overview of RapidLok DOS:
      
      Each track contains sectors 0-11 (Tracks 1-17) or sectors 0-10
      (Tracks 19-35). Each "sector" is composed of a header block 
      beginning with a $75 and is followed by a data-block beginning with 
      a $6B (or a $55 if blank). Each RapidLok track also contains a 
      reference header AND an extra-sector of special length that must 
      match a "master-key". Remember, during loads, RapidLok DOS is
      
            K.J. REVEALED TRILOGY    PAGE [89]     (C)1990 K.J.P.B.