persona2debug/README_IS.txt at master · TCRF/persona2debug · GitHub

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Persona 2: Innocent Sin (PSX)
Debug menu patch

by Revenant (d@revenant1.net)
for The Cutting Room Floor (tcrf.net)
-------------------------------------

This patch is designed to restore some debugging functionality which is present
in release versions of the game, but was made inaccessible. To use it, patch a
BIN/CUE copy of the game, then press Select+Start at almost any time to access
the menu.

Some of the features on this menu (the scene viewer and the dungeon warp) no
longer work correctly, but there's still plenty of other interesting things to
see, as well.

For a more detailed explanation of the stuff this patch enables, check out:
https://tcrf.net/Persona_2:_Innocent_Sin_(PlayStation)

This is based on the corresponding patch for Eternal Punishment, which was in
turn based on the leaked prerelease version which had that debug menu (and much
more) enabled by default. There are some slight differences between the menus
in both games but the actual accessible content is more or less the same.

Compatible files
----------------

This patch is compatible with the following version of the game:

Persona 2 - Tsumi (Japan) (v1.0).bin
MD5 before: 2242494B303F590B34259E1C0E5D921D
MD5 after:  F3EDE6E42F5555919FDE15EFEA286E32

It has not been tested with the "Playstation the Best" edition, nor with the
English patch by Tom and Gemini. Try it with either of these at your own risk.

Tools used
----------

IDA Pro v6.5
no$psx v1.5
armips v0.7d
psx-mode2 v20110910
xdelta v3.0.11