Author Topic: Final Fight SNES Restoration Project (Read 7936 times)

Grego · « **on:** January 16, 2019, 11:16:27 am »

Yesterday it occurred to me that Final Fight for SNES may have some secrets, such as two player support, I decided to investigate and the results speak for them self:

After some reverse engineering of the code and a few minor hacks I was able to enable two player support.

For those that are interested here is the code, works with CRC32(0x4CAB21DB) Final Fight USA and xkas06. I dumped my own cart, not sure how common this version of the game is, sorry.

Code: [Select]

lorom

org $01a643 ; (original code - ldx #$0d00, jsr $a542, phx, pld)
	JML hijack_player_init

org $01a57b
	RTL
	
org $01a651
	RTL
	
org $01a5f2
	NOP
	NOP
	
org $00ca67
	ldy #$0112
	
org $00c9ea 
	JML hijack_player_sim

player_sim_hook:
	jsr $cc45
	jsr $cfd3
	
	RTL

org $208000

hijack_player_sim:
	rep #$20
	lda #$0d00
	tcd
	sep #$20

	JSL player_sim_hook

	rep #$20
	lda #$0d80
	tcd
	sep #$20

	JSL player_sim_hook

	JML $00c9f8
	
	
hijack_player_init:
	LDX #$0d00
	JSL $01a542

	PHX
	pld
	
	JSL $01a64b

	ldx #$0000
	phx
	pld
	
	LDX #$0d80
	JSL $01a542

	PHX
	pld
	
	JSL $01a64b
	
	ldx #$0000
	phx
	pld

	JML $01a656

And here is a link to a very quick disassembly with minimum comments:

https://pastebin.com/PNiGy6aQ

Player two can walk around, but he shares vram space with player 1 currently so moving either character corrupts the other. There is no hit detection for player two yet, nor can player two advance the stage. However I believe both of these issues are resolvable with a few more minor hacks.

I would like to propose a restoration project for Final Fight SNES. Add full two player support, fix industrial area, add guy to the roster, and remove slowdown.

As the game already has the tile data for industrial area we just need to demake the area's arcade graphics. Guy support is partially built into the game already, porting him over from Final Fight guy shouldn't be too hard. Slowdown may be solvable by switching to fast rom, it may need additional work optimizing code, not sure yet.

Just wanted to get this out there, if anyone would like to help with the project with either graphics or code please let me know.

-Grego

Edits: Added disassembly pastebin and CRC32, removed palette test code

SCD · « **Reply #1 on:** January 16, 2019, 12:30:22 pm »

This sounds like a awesome project.

I can help by changing the names of some of the enemies, bosses & items back to their original uncensored names.

I was wondering if you're planning to do all this stuff to your project:

Decensoring the entire game to make it more like the Japanese version.
Restore the missing crowds in stage 3 along with the unused F.Andore enemy.
Add the invincibility & extra life items from Final Fight Guy.

If you're planning to add Rolento to your project, you should try importing his sprites from Final Fight 2 to it and give him these colors:

Grego · « **Reply #2 on:** January 16, 2019, 12:46:05 pm »

Great SCD, any help would be appreciated. I'll try to get a github setup today so people can contribute.

I should mention disassembly help would be welcome as well.

The other things you mentioned are definitely under consideration. The crowds should be quick and easy, decensoring the game might get tricky, as the project will then rely on three different roms to build the final file (Final Fight USA, Final Fight JP, Final Fight Guy). Totally possible, just tricky for people to build for themself, F-Zero Final seemed to be particularly difficult for people and it only used two roms.

Rolento would be amazing to restore, and totally possible, I had the same thought of using the FF2 graphics, however again it adds another rom to the mix. I'd love to see it happen, might be a late addition to the hack.

Thanks for the kind words SCD!

SCD · « **Reply #3 on:** January 16, 2019, 01:03:52 pm »

Alright, I'll make a patch with the uncensored names and send it to you later.

Sadly, I don't know how to disassemble a ROM, but there's definitely people on here that know how.

Alright, that's good to hear that some of my suggestions might be added to your project.

Another thing you need to do to the bartender & the crowds in stage 3 is give them their frames of animation from Final Fight Guy, they don't move at all in the regular version of Final Fight.

Alright, hopefully it will be easy to build the final file with all three games.

Alright, hopefully you'll be able to add Rolento later on.

You're welcome, I'm glad I'll be able to help you on a couple things.

My friend RealGaea released a hack last year that decensors some of stuff back to the American versions of both games, you can check them out here:
http://www.romhacking.net/hacks/3582/

The stuff that are missing are:

Belger's hopping movement, he's not suppose to walk like he did in the American version.
The blood that squirts out of Abigail's head after you defeat him.
The "Oh! My God" voice track.

Maybe this will help you on your project a bit.

Grego · « **Reply #4 on:** January 16, 2019, 01:06:07 pm »

As opposed to a patch please give me a list of addresses and data, otherwise I'll have to extract them from the patch.

Edit: Just saw your edit, very cool, that solves a lot of the decensoring issues.

SCD · « **Reply #5 on:** January 16, 2019, 01:32:25 pm »

Alright, that's good to hear that his hack will help you on your project.

Here's the addresses to the texts that need to be change in Final Fight:

Offset: 1504 = OH! MY CAR (Change it to OH! MY GOD)
Offset: 6850 = SID (Change it to ROXY)
Offset: 685B = BILLY (Change it to POISON)
Offset: 6866 = THRASHER (Change it to DAMND)
Offset: 685B = KATANA (Change it to SODOM)
Offset: 696E = GRANADE (Change it to GRENADE)
Offset: 69DC = ROOTBEER (Change it to BEER)
Offset: 69F2 = VITAMINE (Change it to WHISKY)
Offset: F079 = You fiend ! (Change it to You son of a...)

Grego · « **Reply #6 on:** January 16, 2019, 01:42:04 pm »

Cool, took a look in a hex editor and the name changes should be easy. The hack you linked me to doesn't change the names?

SCD · « **Reply #7 on:** January 16, 2019, 01:46:18 pm »

Yes it does, but three of them weren't changed, here's the ones:

Offset: 1504 = OH! MY CAR (Change it to OH! MY GOD)
Offset: 696E = GRANADE (Change it to GRENADE)
Offset: F079 = You fiend ! (Change it to You son of a...)

Grego · « **Reply #8 on:** January 16, 2019, 01:48:53 pm »

Cool beans, I'll be examining their hack later. If you could contact your friend to let him/her know I'll be expanding upon it I'd appreciate it.

SCD · « **Reply #9 on:** January 16, 2019, 02:05:56 pm »

I sent him a message letting him know about this, he'll be very happy to know that his hack will be used to make the ultimate version of the SNES port of Final Fight.

Another thing you'll need to do to your project is have the 2nd bonus stage appear after the Industrial Area stage like it did in the arcade version.

Grego · « **Reply #10 on:** January 16, 2019, 03:47:03 pm »

Awesome, hopefully he would like to contribute further, it would be nice to make his hacks build from roms. Thanks for your help SCD!

SCD · « **Reply #11 on:** January 16, 2019, 05:05:03 pm »

You're welcome, I'm glad I was able to help you on your project.

Hopefully my friend can contribute more to your project soon.

ginbunbun · « **Reply #12 on:** January 16, 2019, 05:55:37 pm »

Holy shit fellas this sounds amazing. I wish I could offer any kind of help but I have zero skill or knowledge of rom hacking, disassembly, coding, or graphics hacking. All I can do is wish you both the best!

SCD · « **Reply #13 on:** January 17, 2019, 02:10:46 pm »

There's another thing I forgot to mention that you should do is change the music track that plays on Stage 5-2 from 09 to 0A to make it more like the arcade version.

Vanya · « **Reply #14 on:** January 19, 2019, 08:31:05 am »

Hey all. Just wanted to point out that Final Fight Guy is closer to the arcade version than the original.
It might be worth it to look at that version to see if it also has some of those unfinished features that were found in the original.

*Going back to working on those graphics I need to get done now.*

SCD · « **Reply #15 on:** January 19, 2019, 11:11:39 am »

I agree with you, I think it's a better idea to use Final Fight Guy as the main ROM for this project, if it still has the unused content in it.

Because it has a lot of improvements that makes it better than the original and the only thing that has to be imported is Cody.

Grego · « **Reply #16 on:** January 20, 2019, 01:13:46 am »

Well, progress comes quick. Sorry for going silent, was busy disassembling/coding. Got both players displaying:

If SCD's friends patch restores most everything besides a couple new items then there isn't much of a reason to switch to FF Guy besides the lag reduction. Is there any other major improvements to FFGuy?

SCD · « **Reply #17 on:** January 20, 2019, 03:42:21 am »

That's pretty cool of seeing Cody & Haggar on the same screen for the first time on the SNES port, you're doing a good job so far.

Here's all the improvements that Final Fight Guy has:

Hardly any slowdown.
Better enemy layout.
Better difficulty settings.
The extra life & invincibility power-ups.
The F.Andore enemy was actually used in Stage 3, he was unused in the original version.
The neon lights on the bar sign, the light bar above the bar's entrance door, the bartender and the crowds in Stage 3 are animated. They don't move at all in the original version.
Has a special ending if you beat it on expert mode.
The items Barbecue, Curry, Banana, and Grapes were replaced by Chicken, Sushi, Pineapple, and Orange.

I'll talk to RealGaea if he can update his patches to include the three things that I mentioned that were not decensored in them along with giving Stage 5-2 its correct music track.

Vanya · « **Reply #18 on:** January 20, 2019, 08:28:32 am »

I will add that from what I've actually seen not only are the crowds now animated, there are a good amount of missing crowds that were restored from the arcade version as well as some other background elemets that were restored or updated for arcade accuracy.

SCD · « **Reply #19 on:** January 20, 2019, 11:22:54 am »

Interesting, I wonder what other background elements that were restored or updated for arcade accuracy that were added to Final Fight Guy?