This glitch allows you to make money without economic efforts. In Secret of Mana, collected items are stored in 12bytes of RAMs: 1 item per 1 byte. There are 32 kinds of items and you can possess at most 7 items of the same kind (though usually limited by 4 items). In the memory, lower 5 bits indicates what kind of item you have, and upper 3 bits tells you how many items you have. For example, 0x40 means two candies and 0x20 is one candy, or 0x26 means one magic rope and 0x06 is zero magic ropes.
0xFF usually means blank. But if the cursor points the item 0xFF, you can sell it with 30000 GP. In fact, 0xFF calculates as if you have zero glitched item “BLAT”. When you sell it, the RAM number is subtracted by 0x20 then becomes 0xDF, which means 7 “BLATS”
You can access this memory like this way. If you have 2 candies 1 chocolates, 1 herbs, 1 ropes, and nothing else, and the cursor points the rope, then the 12bytes RAMs is like this. (Hexadecimal)
40 21 24 (26) FF FF FF FF FF FF FF FF
( ) means the cursor. Don’t move the cursor and sell chocolates and herbs. Then these RAMs become like below.
40 26 (FF) FF FF FF FF FF FF FF FF FF
The cursor moves once, but not more than twice. So you can select the blank item (zero “BLATs”). In this situation, the former 2 items are displayed as item icons. But the actual items are glitched. Described candy is actually a magic rope, and the described magic rope is zero BLATs, whose price is 30000 GP.
This glitched situation will be finished if you buy something or restart the game. But if you sell the blank to earn 30000 GP and get new item (like chocolate), then the RAMs becomes below and items remains glitched.
40 26 DF 21 FF FF FF FF FF FF FF FF
This is because if you get a new item, the nearest 0xFF is replaced by that item. Item 0xDF (7 BLATs) has no icons. So there are only three icons and new item cannot be selected because the cursor itself is not glitched anymore.
In the gameplay, I bought a chocolate to go through the situation that the Flammie Drum cannot be accessed. But if you want to recover the glitch completely, you must sell all the BLATs to blank and then restart the game or buy something new.
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