47 lines
1.8 KiB
NASM
47 lines
1.8 KiB
NASM
;===========================================================
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; Key Block Object like Link's Awakening
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; Overwrites the Prison Door
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;
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;
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; WRITTEN: by XaserLE
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; THANKS TO: -PuzzleDude for finding a drawing bug and get rid of it
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; -MathOnNapkins' Zelda Doc's
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; -wiiqwertyuiop for his Zelda Disassembly
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;
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; The blocks can be opened from up- or downside only, left and right will not work (will try to fix this in the future).
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; The patch is "in place" so it doesn't overwrite other data or patches you added.
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;
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; PuzzleDudes Note:
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; The key block must always be placed on EVEN x and y.
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; The even x or y is: 00, 02, 04, 06, 08, 0A, 0C, 0E, 10, 12 etc.
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; HM x and y value of the position of the key block must end with: 0, 2, 4, 6, 8, A, C, E.
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;===========================================================
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lorom
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ORG $01EB8C ; go to the code that loads the big key holding variable
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LDA $7EF36F ; load the small key counter
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AND #$00FF ; check if we have at least one small key (AND will not be zero)
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BEQ $4C ; if not (AND is zero), don't do anything and especially don't give this "Eh? It's locked..." - message
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; otherwise we will decrement the small key counter and branch to the code that opens the prison door
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LDA $7EF36F ; reload small key counter
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DEC A ; remove one key
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STA $7EF36F ; save the new value at small key counter position
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BRA $05 ; branch to the code that opens the prison door
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; now correct a drawing bug in the original game that causes the floor tile under the door drawed odd
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ORG $01EBC8
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LDA.w $9B5A,y
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ORG $01EBD1
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LDA.w $9B54,y
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ORG $01EBDA
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LDA.w $9B5C,y
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; draw values representation
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; 50- /
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; 52- normal
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; 54- x mirror
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; 56- normal
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; 58- x mirror
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; 5A- y mirror
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; 5C- xy mirror
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; 5E- y mirror |