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User:CytricAcid/Beginner's Guide To ACE/US Red and Blue Guide: Difference between revisions
User:CytricAcid/Beginner's Guide To ACE/US Red and Blue Guide (view source)
Revision as of 00:46, 26 March 2023
, 1 year ago→3. Setting up our first code: Changed Full Heal ×2 to Full Heal ×3 to avoid potentially unsafe filler code.
(→Get a ×255 item stack: Moved some non-essential screenshots (or placeholders thereof) to the right, and moved inessential details to the notes, so that the section fits in one screen (on my laptop).) |
(→3. Setting up our first code: Changed Full Heal ×2 to Full Heal ×3 to avoid potentially unsafe filler code.) |
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Line 186:
* (Any non-Key item) ×(any)<ref group="note">In fact, this also works with Key items, but it would be harder to see the effect.</ref>
* Antidote ×43
* Full Heal ×3<ref group="note">An earlier version of this setup used ×2 instead of ×3, which corresponds to the assembly instruction <code>ld [bc], a</code>. That is not a universally safe filler (it depends on the value of <code>bc</code>), although with the Tentacool setup described on this page it should be safe (in the case of 5 Pokémon in the party, only barely safe thanks to the Antidote (<code>dec bc</code>) changing the address written from $FFB8 to $FFB7).</ref>
* TM01 ×(any)
{{Explanation|title=ASM translation|contents=
Line 193:
! Item slot !! Item stack !! Hex !! ASM !! Comments
{{!}}-
{{!}} rowspan=2 {{!}} 3rd {{!}}{{!}} rowspan=2 {{!}} Antidote<br />×43 {{!}}{{!}} 0B {{!}}{{!}}
{{!}}-
{{!}} 2B {{!}}{{!}} '''dec hl''' {{!}}{{!}} hl = $D321 (the quantity of the second item)
{{!}}-
{{!}} rowspan=2 {{!}} 4th {{!}}{{!}} rowspan=2 {{!}} Full Heal<br />
{{!}}-
{{!}}
{{!}}-
{{!}} 5th {{!}}{{!}} TM01 {{!}}{{!}} C9 {{!}}{{!}} '''ret''' {{!}}{{!}} Returns control to the calling routine
Line 205:
* {{color|red|If you ever start making your own codes, always remember to end it with a <code>ret</code> instruction. Otherwise the game will continue to execute the remainder of your inventory (and possibly more data following that) as assembly code, which is likely to cause a crash, and potentially worse.}}
** That is, unless you know what you are doing and have a good reason not to (e.g. you ended the code with a <code>jp</code> to another function instead).
* As can be seen above, the "Antidote" in "Antidote ×43" and the "
}}
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