Generation I item codes: Difference between revisions

Most of the following example setups are for the glitch item [[ItemDex/RB:093|8F]]. The most popular bootstrap strategies for 8F jumps to the '''third item in the item pack''' ($D322 in English R/B, $D321 in English Yellow), leaving the first two item slots for 8F itself and possibly any item (that is not part of the code) to be manipulated. Most setups work for all other methods of ACE, such as [[ItemDex/RB:106|-gm]] or [[Arbitrary code execution#Via text boxes|text box ACE]], as long as they jump to the third item in the item pack during bootstrap.

== Fix -gm bootstrap ==

Due to limitations on space and the available character set, the [[ItemDex/RB:106#Initial luckytyphlosion bootstrap|initial bootstrap strategy for -gm]] designed by luckytyphlosion jumps to the ''second'' item in the item pack, which might make it inconvenient to make use of existing item codes and/or manipulate items. The below item code<ref name="lucky_guide">[https://pastebin.com/iGyyJstG Rough -gm guide (v0.1)] by luckytyphlosion</ref> is designed to fix this by modifying the initial bootstrap, inserting two "inc hl" instructions before "jp hl":

-gm

Thunderstone x1

TM17 x2

X Accuracy x79

Protein x2

Antidote x62

HP Up x2

Water Stone x2

Burn Heal x34

Parlyz Heal x62

TM33 x2

X Speed x34

TM01 x[any qty]

After setting up the item list and using -gm once, the jump target of -gm will be changed to the third item in the item pack.

The code is designed to be spelled with distinct items that are easy to buy in the Celadon Department Store. As a result, there are a lot of dummy instructions that can be adjusted according to the player's situation.

<b>ld hl, $D901</b>

ld [bc], a

<b>ld l, $4F</b>

<b>inc h</b> ; hl = $DA4F

ld [bc], a

dec bc

<b>ld a, $23</b> ; opcode for "inc hl"

ld [bc], a

<b>ld [hli], a</b>

ld [bc], a

inc c

<b>ld [hli], a</b>

rrca

<b>ld a, $E9</b> ; opcode for "jp hl"

ld [bc], a

ld b,e

<b>ld [hli], a</b>

<b>ret</b>

== References ==

<references />