Top Gun: Top Gun MMC5 Patch

This is an Mapper Conversion hack for Top Gun ROM from UNROM to MMC5.

Features:

Expansion RAM ($5C00-$5FFF, read/write)
CPU $6000-$7FFF: 8 KB switchable PRG RAM bank
Bankswitching included. Readme file for more info.
Extended RAM mode ($5104)

Read the Readme for changes in this version v1.2

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

Now works with BizHawk and Mesen.

Top Gun Mapper Conversion
From UNROM to MMC5 (from UNROM to Mapper 5)
by Dracula X

RELEASE DATE: August 15, 2019
Last Modified: August 18, 2019
TIME SPAN FROM START TO FINISH: 1 Day

I have expand the ROM so hackers can add more new codes in the hardwired bank.

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

LDA bank_number
JSR $FFB0

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 $FFB0
JMP New Location

or

LDA bank_number
JSR $FFB0
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 only works for:
US Revision 0
US Revision 1

This patch does not work for:
Japan Version
Europe Version

Changes for this version 1.2:
Change all $FF's to $00's in the expanded ROM area from location $20000

Changes for this version 1.1:
Expand the ROM so hackers can use all the free space in the hardwired bank.
Fixed: I changed $4c JMP to $20 JSR because it was wrong at location $1ec24.


Non Supported Emulators:
Nintendulator
RockNES
VirtuaNES

Database match: Top Gun (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: D144A1E16646CC52F0D5CA06DDED7EF385CD1AC2
File CRC32: 8DD55C5F
ROM SHA-1: C192B29063912E15A8E91A97F4785EAEB4A13FB9
ROM CRC32: 4E22368D