-----BOSS SELECTION SCREEN-----

  $1B56A      - The one background tile ID
  $1B669      - Location for both halves and attributes for the left half of the special Guts Man attributes
  $1B671      - Attributes for the right half of the special Guts Man attributes
  $1BE2B-1BE4E- Boss frame design (normal)
  $1BE4F-1BE72- Boss frame design (Guts Man)
  $1BE73-1BE96- Boss frame design (Wily)
  $1BE97-1BEA4- Table of frame locations for all 7 bosses. 2 bytes per location; the first byte plus the two lowest bits
                from the next byte (as the two highest bits of the location) determine the number of tiles to skip
                before drawing the frame. Second byte is always 2x.
  $1BEA5-1BEAB- Table of frame background locations for all 7 bosses. 1 byte per location; format is xy.
  $1BEAC-1BEB5- Some sort of attribute stuff for the flashing background
  $1BEB6-1BEB9- Locations for the flashing background behind "STAGE SELECT  PRESS START"
  $1BEBA-1BEBF- Unknown; has to do with the flashing background
  $1BEC0-1BECB- 6 entries, one per boss, of 2 bytes each telling the game what boss ID to go to next if you press right
                or left, in that order; used when Dr. Wily is unavailable
  $1BECC-1BED9- Just like the previous table, but with 7 entries; used when Dr. Wily is available

  $1BEDA-1BEF5- 7 entries, one per boss, of 4 bytes each, telling the game the frame ID, Y position, X position, and
                sprite flag, respectively, for each boss on the boss select screen
  $1BEF6-1BF11- 7 entries, one per boss, of 4 bytes each, telling the game the Y velocity high, Y velocity low, X
                velocity high, and X velocity low, respectively, for when the boss has been selected and is jumping
  $1BF12-1BF18- 7 bytes, one per boss, saying which frame ID to use when the boss has been selected and is jumping
  $1BF19-1BF1F- 7 bytes, one per boss, saying which frame ID to use when the boss lands after jumping
  $1BF20-1BF26- 7 bytes, one per boss, saying which graphics to use for that boss. Format seems to be the first tile for
                that boss on the pattern table, but EOR'd by 80 (?)
  $1BF27-1BF2D- 7 bytes, one per boss, defining attributes for that boss
  $1BF2E-1BF3B- 7 pointers, one per boss, to animation data for the animation the boss does after being selected
                Animation format: 2 bytes per frame: Frame ID, delay before advancing to next frame. Terminate animation
                with FF. The animation will continue until a certain time is reached.
  $1BF3C-1BF6A- Animation data. Locations within the data for each boss are determined by the above pointers
  $1BF6B-1BF7E- 10 text pointers. Order of pointers is 7 bosses, then STAGE SELECT, then PRESS START, then CLEAR POINTS
  $1BF7F-1BFDB- Text data. Locations for text in the data are determined by the above pointers