B = byte
S = short/2 bytes (little endian format)
b = bit

/// battle dialogue ///
02 01  break line
02 00  end dialogue
20  space

/// battlefields ///
B0-4 GFX sets
B5	  (nothing uses this)
B6	  BG1 Tileset
B7	  Palette Set

/// flower bonus messages ///
0: ATTACK
1: DEFENSE
2: UP!
3: HP MAX!
4: ONCE
5: AGAIN!
6: LUCKY!
B0     length of text
B1-Bx  the text

/// level-up learned spells ///
B0	Mario's spell to learn
B1	Toadstool's spell to learn
B2	Bowser's spell to learn
B3	Geno's spell to learn
B4	Mallow's spell to learn

/// level-up mods ///
B0		HP increase
B1,b4-7	Attack increase
B1,b0-3	Defense increase
B2,b4-7	Mg.Attack increase
B2,b0-3	Mg.Defense increase

/// mine cart objects ///
S0: mode7 object maps (8 mushrooms * 2 maps = 16)
S1: stage 2 object map (byte 1,0: screen width)
S2: stage 4 object map
S3: stage 2 screen map (L1)
S4: stage 2 screen map (L2)
S5: stage 4 screen map (L1)
/ Mode7 object map format (16 objects, 2 bytes each) /
  B0: X coord
  B1: Y coord
/ stage 2,4 map width /
  S0: total width in pixels of the map
/ stage 2,4 objects (5 bytes per object) /
  S0: X pixel coord of object row
  B2: object type
  B3: row size
  B4: Y pixel coord of object row
/ screens (1 byte per screen index) /

/// monster flower bonus ///
b0-3   flower bonus
1-5 = Attack Up, Defense Up, HP Max, Once Again, Lucky
b4-7   odds of getting flower

/// monster target ///
lower bits: +Y coordinate from bottom of monster
upper bits: -X coordinate from right of monster

/// sound effect SPC-700 ///
pointers (add to 03F826)...
1st pointer: sound channel 7
2nd pointer: sound channel 8
data...
D0  terminate SPC
042C45-042C56  jump SPC (both channels)


/// sprites ///
S0: pointer to GFX
S1: pointer to palette

/// overlap tilesets ///
B0-3: 16x16 tile indexes
B4: invert/mirror tiles
b7,6 invert/mirror NW tile
b5,4 invert/mirror NE tile

/// tilesets ///
2048(800h) bytes per quadrant, 32x32 subtiles per quadrant
32 subtiles per row, 2 bytes per subtile = 64 bytes per row
/ subtile format (2 bytes each) /
  S0,b0-8:  subtile index
  S0,b9-11: palette index
  S0,b13:   priority 1
  S0,b14:   mirror
  S0,b15:   invert