ItemDex/RB:093: Difference between revisions
→Usage
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For example applications of 8F, see [[Generation I item codes]]. Notice that all applications involving an item list need a bootstrap code to work.
During the start of the execution of 8F, the following registers and stats are expected to be constant:
*a=63
*bc=00b8
*de=0001
*hl=d163
*Flags z, n, h, c are not set
*lcdc=E3
*ie=0D
*if=F0
*spd=0
*rom=3 (FFB8; loaded ROM bank)
*ime=1
*ima=1
==Bootstrapping==
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===
{{Explanation|title=Details|contents=
The "233 HP Pidgey" setup used to be the most popular 8F setup, although it is considered outdated due to the difficulty of controlling the exact HP value of a Pokémon. It consists of 5 valid Pokémon, with one of them having a specific current HP value:
# 5 Pokémon
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The bootstrap code translates to the following ASM:
<pre>
</pre>
Understanding the ASM will allow modifying the setup to suit different needs. For example, to make 8F run code starting from item 1 ($D31E), replace the Onix (0x22) with a Tangela (0x1E).
A slight modification to the above setup allows a full team of 6 Pokémon, with any Pokémon at the front, which may be desirable when using an instant encounter script, for example (the lead Pokémon can be used to weaken the enemy Pokémon, and when the enemy is caught it's sent to the PC without messing up the setup).
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ASM translation:
<pre>
</pre>
'''3 Pokémon super-compressed setup'''
▲ $D163 <- 06 ||
▲ $D164 <- ?? || ld b, ??
▲ $D165 <- 24 || inc h ; h = D2
▲ $D166 <- 2E ||
▲ $D167 <- 22 || ld l, 22 ; hl = D222
▲ $D168 <- 18 ||
▲ $D169 <- 2D || jr 2D ; pc = D197
▲ (...)
▲ $D197 <- 24 || inc h ; h = D3
▲ $D198 <- 00 || nop
▲ $D199 <- E9 || jp hl ; pc = D322
▲===3 Pokémon super-compressed setup===
It is possible to use a super-compressed setup, but it requires some difficult to obtain glitch Pokémon, namely [[GlitchDex/RB:195|h POKé (0xC3)]] and [[GlitchDex/RB:211|M p'u ゥ (0xD3)]].
# 3 to 5 Pokémon
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ASM translation:
<pre>
</pre>
Notice that this setup doesn't set hl to $D322, which some common item setups assume. For those item setups, inserting two items will fix this problem:
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# (Listed items)
(credits to [https://archives.glitchcity.info/forums/board-115/thread-6638/page-37.html#msg204534 NukingDragons] for this fix)
}}
===In other European versions===
In other European versions, the 8F item is named 7EME ETAGE (French) / S7 (German) / 7°P (Italian) / P7 (Spanish). It still executes code the same way, but the setup will be different due to differences in the memory layout, with the third item at $D327 rather than $D322.
==See also==
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