XCOTA TAG V5.2 SPECIAL - four-ROM builder
October 5 installer correction: the README/package hash mismatch is fixed.

BUILD ON WINDOWS
1. Extract this ENTIRE download into a NEW folder. Do not run it inside
   the download ZIP or copy individual files over an older package.
2. Have these four clean game ZIPs ready; leave the game ZIPs zipped:
   XCOTA: X-Men: Children of the Atom, Euro 950331 (xmcota.zip).
   MVC1: Marvel vs. Capcom, Euro 980123 (mvsc.zip).
   XMvsSF: X-Men vs. Street Fighter, Euro 961004 (xmvsf.zip).
   MVC2: Marvel vs. Capcom 2, Naomi Export/Korea Rev A (mvsc2.zip).
3. Select ALL FOUR game ZIPs in Explorer and drag them TOGETHER onto
   BUILD V5.2 SPECIAL.cmd in the extracted folder. Any order works.
4. Wait for V5.2 gameplay repair built. The game is output/xmcotas4p.zip
   inside this folder. All original game ZIPs are left unchanged.

PLAY IN RETROARCH
5. Use PLAY V5.2 SPECIAL.cmd. If RetroArch is installed elsewhere,
   drag retroarch.exe onto that PLAY command or pass its full path.
   Alternatively, load the included cores/windows/
   fbneo_xcota_special_expanded_libretro.dll as the core, then load
   output/xmcotas4p.zip as the content. A standard FBNeo core or the
   Fightcade executable cannot load the expanded Special edition.
6. Bind four RetroPad ports: team one uses ports 1 and 3; team two
   uses ports 2 and 4. The matching core supplies the four-player setup.
   Apple silicon: use arm64 RetroArch and the included cores/mac/
   fbneo_xcota_special_expanded_libretro.dylib with the same output.

WHICH ZIP FORMATS WORK?
XCOTA/MVC1 merged parents with regional clone subfolders are accepted.
Flat archives, one enclosing game folder and small desktop metadata
are also accepted. The required Euro parent must be complete.
XMvsSF USA/Japan 961023 are supported too. A split clone needs its
clean xmvsf.zip parent beside it; drag the parent and clone together
with the other three games. Japan has xvsj.03k and xvsj.04k.
MVC2 must contain epr-23085a.ic11 (4 MiB), mpr-23048 through mpr-23061
(14 files of 8 MiB), and mpr-23083/mpr-23084 (2 files of 4 MiB), with
their cartridge suffixes. Recognized Naomi BIOS/EEPROM extras in the
usual 52-member set are allowed; do not remove them. A CHD/GD-ROM,
console disc or collection ZIP is not the supported cartridge set.

IF THE BUILD STOPS
Package source differs: README.txt means the old Special DOWNLOAD
was inconsistent. Download this corrected package and extract it into
a fresh folder. It is not a missing ROM, and editing the README or
disabling checks is not a fix.
Missing game/member: check all four games and the exact revisions above.
Member size/hash differs: your ZIP contents do not match the supported
clean revision. Renaming a ZIP cannot change its revision.
No Python, SDK or compiler installation is needed: Windows PowerShell
5.1 and inbox .NET compile the included authored patch sources.
No game ROM, key, donor sprite or donor sound is supplied. Complete
corresponding core sources are included in source/.
