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LoadEDTile

luckytyphlosion Nov 1st, 2015 101 Never
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  1. LoadEDTile: ; 675b (1:675b)
  2. ; In Red/Blue, the bank for the ED_tile was defined incorrectly as bank0
  3. ; Luckily, the MBC3 treats loading $0 into $2000-$2fff range as loading bank1 into $4000-$7fff range
  4. ; Because Yellow uses the MBC5, loading $0 into $2000 - $2fff range will load bank0 instead of bank1 and thus incorrectly load the tile
  5. ; Instead of defining the correct bank, GameFreak decided to simply copy the ED_Tile in the function during HBlank
  6.         ld de, ED_Tile
  7.         ld hl, vFont + $700
  8.         ld c, $4 ; number of copies needed
  9. .waitForHBlankLoop
  10.         ld a, [rSTAT]
  11.         and %10 ; in HBlank?
  12.         jr nz, .waitForHBlankLoop
  13.         ld a, [de]
  14.         ld [hli], a
  15.         ld [hli], a
  16.         inc de
  17.         ld a, [de]
  18.         ld [hli], a
  19.         ld [hli], a
  20.         inc de
  21.         dec c
  22.         jr nz, .waitForHBlankLoop
  23.         ret
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