Guides:SRAM Glitch ACE Setups (Yellow): Difference between revisions

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===Explanation===
===Explanation===


The item code itself consists of two components. The first 10 items are used to write a program that takes text characters from the nicknames of characters currently within the active box, converts them, then writes the resulting values to unused memory starting from $D66A.
The item code itself consists of two components. The first 10 items are used to write a program that takes text characters from the nicknames of characters currently within the active box, converts them, then writes the resulting values to unused memory starting from $D66E.


Pairs of text characters are converted to single values through a [(2a + b)%256] formula, where a is the value of the first character and b the value of the second. text terminators are skipped, the code will stop and execute the newly written code once it either reads a $00 value or if values are being read past $DEFF.
Pairs of text characters are converted to single values through a [(2a + b)%256] formula, where a is the value of the first character and b the value of the second. text terminators are skipped, the code will stop and execute the newly written code once it either reads a $00 value or if values are being read past $DEFF.


<pre>
<pre>
11 6F D6 ld de, UNUSED_MEMORY ; Memory between $D66F and $D6F4 goes unused
11 6E D6 ld de, UNUSED_MEMORY ; Memory between $D66F and $D6F4 goes unused
D5 push de
D5 push de
21 0B DE ld hl, wBoxNicks
21 0A DE ld hl, wBoxNicks
.loop
.loop
2A ldi a, (hl)
2A ldi a, (hl)
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</pre>
</pre>


The last item, the Leaf Stone, simply form a pointer to $F32F. Due to echo RAM this address is equivalent to $D32F, which correspond to item #6's item ID, the start of the item code. By replacing the map script pointer with this item, we can redirect the map script routine to execute the item code instead. This routine is executed on every frame, as long as the start menu isn't open.
The last item, the X Accuracy, simply form a pointer to $F32E. Due to echo RAM this address is equivalent to $D32E, which correspond to item #7's item ID, the start of the item code. By replacing the map script pointer with this item, we can redirect the map script routine to execute the item code instead. This routine is executed on every frame, as long as the start menu isn't open.


===Raw Assembly===
===Raw Assembly===


<pre>
<pre>
11 6F Max Potion x111
11 6E Max Potion x110
D6 D5 TM14 x213
D6 D5 TM14 x213
21 0B Thunderstone x11
21 0A Thunderstone x10
DA 2A TM22 x42
DA 2A TM22 x42
03 87 Great Ball x135
03 87 Great Ball x135
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F4 C9 TM44 x201
F4 C9 TM44 x201


2F F3 Leaf Stone x243
2E F3 x243
</pre>
</pre>


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