The Goonies II: The Goonies II MMC5 Patch

This is a Mapper Conversion hack for The Goonies II ROM from UNROM to MMC5.

Features:

Read the Readme for changes in this version v1.2

Note: The author has tested most of the emulators but doesn’t work well with Nintendulator, RockNES, and VirtuaNES.

Now works with BizHawk and Mesen.

The Goonies II (USA) Mapper Conversion
From UNROM to MMC5 (from UNROM to Mapper 5)
by Dracula X

RELEASE DATE: August 17, 2019
Last Modified: 5-21-2020

Bankswitch:
To use it, all you have to do is select a bank and jump to it.

LDA bank_number
JSR $FFE0

You can also use Nflate from http://www.romhacking.net/ Utilities to expand the ROM up to 512kb.

You can now use free RAM space at $5c00 to 5fff and $6000 to $7fff for cool or new stuff.

Bankswitching:
to bankswitch from $8000 - $Bfff and from $C000 - $ffff, here's how to do it:

LDA bank_number
JSR $FFC0
JMP New Location

or

LDA bank_number
JSR $FFC0
RTS

New location would be $8000 or $A000 etc... Bank 08 would be at $20010.

Credits:
Rockman: for info on how to convert the mapper!
Disch: for his mapper docs!

Have fun!

This patch also works for:
Goonies 2 - Fratelli Saigo no Chousen (Japan)

This patch does not work for:
Europe Version

Hacks supported:
All!

Hacks not supported:
MMC3 Hacks

Use Delta Patcher to patch the xdelta file to the ROM.
Ignore the checksum and then patch the file.

Changes for this version 1.2:
Changed the MMC5 Setup and changed the bankswitch code to a new location
and now, all hacks are now supported except for MMC3 hacks.

Changes for this version 1.1:
Change all $FF's to $00's in the expanded ROM area from location $20000

Non Supported Emulators:
Nintendulator
RockNES
VirtuaNES

Database match: Goonies II, The (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: 0A5B8FD5E46F56203F8BF12E888F4F2EA1616AA8
File CRC32: AA9CA482
ROM SHA-1: 637D894A3704099F8519D1B048219395F14C6BB7
ROM CRC32: 999577B6