Random Hack/Mini Project Thread

Clownacy · Jan 2, 2018

This was way harder to make than I thought it would be.

Download

Crappy Blue · Jan 2, 2018

This is a gift. I'm gonna have to set aside time to do a full playthrough with this.

BSonirachi · Jan 20, 2018

So the PS1 version of a missing X68000 Sonic fangame has Sonic recoloured red, and Techokami had found the original blue palette still lying around in the executable. So, by using a hex editor to overwrite the red palette with the blue one using the addresses Techo had posted, I have restored Sonic's original colour from the X68000 version.

Download (must run it in ePSXe or any other PS1 emulator)

Clownacy · Feb 6, 2018

For those who really hate Sonic CD's jump sound.

I'll just quote the description here:

Ever wonder why Sonic CD had its own jump and skid sounds? The game uses SMPS Z80, a sound driver that's run on the Mega Drive's coprocessor, the Z80. The Z80 is limited in what it can access: it has 0x2000 bytes of RAM, and an 0x8000-byte window into the cartridge. Problem: Sonic CD isn't on a cartridge.

Because of this, the devs had to squeeze every non-PCM sound effect into Z80 RAM... the same RAM that was already being used by the sound driver itself.

To make room, the sound driver was stripped-down, removing the ability to play music, and also for sounds to use the PSG channels. The Mega Drive has two sound chips, one for FM (a synthesiser), and one for PSG (square wave).

So guess which sound effects just happened to use PSG?

And that's why the jump and skid sounds are so different: they were remade in FM.

So how did I get the original sounds back? Well, I didn't feel like adding PSG support back to Sonic CD's driver, so I did the next most logical thing: I ported Sonic & Knuckles's driver to Sonic CD.

Yeah, as it happens, S&K actually uses SMPS Z80 as well. In fact, it uses a later, improved version (S&K uses "Type 2", while SCD uses "Type 1"). While S&K's driver was also stripped-down, it still has PSG support. All I had to do was take out all the code I didn't need, put SCD's sounds in it, add the one or two features SCD's driver has that S&K's doesn't, and paste it in a Sonic CD ISO.

...That was way easier said than done. Trying to make room for all the sounds was an absolute nightmare. At one point I figured out the time travel screen was exploiting a bug in the driver, so the sound wouldn't be cut off right when the screen goes white. Ironically, to "fix" the game, I had to add that bug back in.

All that just so I can hear Sonic CD without the FM jump sound :|

Anyway, since I don't want to upload a 700MB file, I'll just show you how to hex edit your own ISO:

Open your ISO or BIN or whatever in a hex editor, and find the following pattern of bytes: F3 F3 ED 56 18 1F

At that location, replace the following 0x1A3A bytes with the contents of this pastebin (tested with USA ISO): https://pastebin.com/QV424as5

If you're using the Japanese version of the game, use this pastebin, and replace 0x1DCA bytes instead: https://pastebin.com/BdHmBWEs

And that's it.
Click to expand...

Yes I know the bit about the Z80 accessing the 68000's address space is a gross oversimplification, but you try explaining that kind of stuff to the YouTube comment section =P

nineko · Feb 6, 2018

And now that's fantastic, awesome work, Sonic CD can have a decent jump sound at last. I'm almost tempted to play Sonic CD now. Almost.

Dark Sonic · Feb 6, 2018

Lovely, Sonic CD's jump noise was always garbage.

I wonder if anyone ever made a hack to replace the jump sound in the Taxman PC version though? That seems like it'd be a lot simpler to do/more practical than this (although this is nice).

Black Squirrel · Feb 6, 2018

Chaotix next???

I'm sure I read somewhere you can convert from one to the other by using sine waves instead of square and vice versa. Or maybe that's a myth. Or maybe I don't understand what I'm talking about.

Drex · Feb 6, 2018

^jumping and Spin Attacks in general will still be ass until someone decides to find a way to make the speed of the Spin Attack animation dynamic like the original games.

Devon · Feb 8, 2018

Sonic 2 "Forces Edition"

Thanks to MotorRoach for the extra Tails sprites. It was also his idea, so blame him. :v:
Also, thanks to Clownacy for the Sonic 2 Clone Driver, just so I could use vladikcomper's Mega PCM driver in Sonic 2 easily

Drex · Feb 8, 2018

Ralakimus said:

Greatness

Sonic 2 "Forces Edition"

Thanks to MotorRoach for the extra Tails sprites. It was also his idea, so blame him. :v:/>/>/>/>/>
Also, thanks to Clownacy for the Sonic 2 Clone Driver, just so I could use vladikcomper's Mega PCM driver in Sonic 2 easily
Click to expand...

I love you

Knucklez · Mar 11, 2018

I just stumbled upon this on romhacking so I figured I'd share the link since it's Sonic-related.

Here's a new Super Mario Bros NES hack featuring Sonic. Look's kinda cute from the screenshots.

https://www.romhacking.net/hacks/3902/ ...RedHotSonic seems to have made a cameo in it too!

Campbellsonic · Mar 18, 2018

http://www.youtube.com/watch?v=OUx3ctWgc-s

After two months of torturing myself and procrastinating, I have completed... Sonic 2: Forces Edition! Basically Sonic 2 except Sonic and Tails control like Classic Sonic in Sonic Forces, plus some other random jabs.

Download

Also...

Ralakimus said:

Sonic 2 "Forces Edition"

Thanks to MotorRoach for the extra Tails sprites. It was also his idea, so blame him. :v:/>/>/>/>/>/>/>/>
Also, thanks to Clownacy for the Sonic 2 Clone Driver, just so I could use vladikcomper's Mega PCM driver in Sonic 2 easily
Click to expand...

It seems I accidentally stole your hack's name. But instead of renaming it... Is there any chance we could combine these!? They'd fit together so well. :v:/>

Devon · Mar 18, 2018

When I get access to the source at my other house next week, perhaps.

Mr Hooman · Mar 28, 2018

Both Sonic 2 Forces Editions are an absolute delight to play, and definitely do a great job at pointing out the... flaws of Forces.

Sonic! H E L P M E !

Caverns 4 · Mar 29, 2018

@Clownacy
Yeah, I'm like, almost two months late, and I should've spoken up sooner.
I LOVE your Sonic CD fix. That's like, 30% of my frustration when playing the game removed.
If I ever play the original again, I'm definitely going to use that mod!

(And yes, I know the @ thing doesn't work here. I just didn't didn't wanna quote the post. XD)

Devon · Apr 2, 2018

My April Fools hack on SSRG:

Sonic 2 Good Edition

Shoemanbundy · Apr 2, 2018

Ralakimus said:

My April Fools hack on SSRG:

Sonic 2 Good Edition
Click to expand...

Using MMF back in 2002 <3

rata · Apr 6, 2018

Surprisingly, the music sound way less ear-piercing than all other hacks that use it.

Sonic Hachelle-Bee · Apr 27, 2018

I wanted to play Ristar (Game Gear) with act 1 of "Planet Fanturn" unlocked in the US/EUR version "Planet Terra". Here is a quick and clean hack for this. Maybe it is worth sharing.

Ristar Complete (Game Gear)

CodenameOmega · Apr 28, 2018

This is my passion project. It's called "Blaster The Hedgehog". Right now, it looks like "Blaster In Sonic 2", but it will soon be revolutionary (I hope).

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