Sega Mega CD ISO Hacks & Editors

[Tony H]

Hawkeyes, here is some info on the IPS format...

"support for patching files up to 16 MB in size, which is the limit of the IPS format. The files can technically be larger than that, but the IPS format cannot record changes beyond the 16 MB mark due to 24-bit addressing."

The part of the bin file that I'm trying to patch is around the 150MB area, which is way beyond the limit of the IPS format.

It looks like we are going to have to put your hex editing skills the test again. What I'll do is post a string of the hex values before any changes are made, and then a second string of hex values that have been hacked with the stuff you want. You can compare them to make sure you're changing the right values.

The first string is before any changes, second string is with your changes...

00140014000F000F0502040205060C02000000000000000001 0000000D000000000000000000000039007100000002181818 181A000000000000

00E600E6006300630502040205060C02000000000000000001 0000000D000000000000000000000042007D00000002181818 181A242424B19D7A

[Tony H]

I'll check it out. Thanks.

I added all the hacks you wanted to my bin file and tested it. This is the result...



Seems to work perfectly. Now I just have to make an IPS file.

[hawkeyes]

btw I got it from:http://www.zophar.net/fileuploads/1/...-111-setup.exe
I have used zophars site before with no virus problems unfortunately this is all I could find that could apply AND create patches,sorry...

[Tony H]

An IPS program? Sure.

[hawkeyes]

I found one,it requires installation but avg anti virus says it is clean.here it is I tried it with the lunar rom and a random ips patch I had lying around,it worked.

http://www.mediafire.com/?97q0x89gnu9ww3p

[Tony H]

Can anyone recommend a good IPS program that can create and apply IPS patches? I need one that can handle large file sizes (577MB). My old favorite (Lunar IPS) says it will only handle up to 16MB.

[hawkeyes]

Hmm,if you are willing to make me an ips patch that would be great.I got a game freeze when I opened the status screen after the intro when I tried to do it myself.heres a list of things I would like...

hiro
starting hp:230/230
starting mp:99/99
starting weapon:Flame Saber
starting armor:Platinum Armor
blank slots:Heal Ringx3,Pyro Helm,Thunder Shield,Lightning Armor

also take note that hero obtains a key item after the intro video I think it is a dragons eye gem or something like that,I might have overwritten it by mistake resulting in the freeze I got so be careful and thanks again.

[Tony H]

Thank you very much for your help though I don't know if I'll be successful in this I will try,my math skills are so low a 2nd grader could do me in in a math contest,lol.

Make a backup copy of your bin file in case something goes wrong. It's a huge file (577 MB), so if you have a slow connection like me, it will take a little time to download it again. Easier to make a backup.

If you have any trouble figuring out your hex editor, let me know.

EDIT: If you can't figure out how to hack your bin file, I can make an IPS patch, but then there's the problem of which items you want, which magic, etc. If you do the hacking yourself, you can decide what you want. But if you want an IPS patch, figure out what you want and let me know.

[hawkeyes]

Thank you very much for your help though I don't know if I'll be successful in this I will try,my math skills are so low a 2nd grader could do me in in a math contest,lol.

[Tony H]

Hawkeyes, found more ISO/bin hacking info for Lunar Eternal Blue (SCD)...

Use the same search as before with your hex editor: 02181818181A. There's only 1 match. But remember that if you already hacked those values earlier, you'll need to change your search. The ROM/bin address should be: $08F9832E.

A few bytes before this, you'll see these 2 values: 39 71. The 39 is the Dagger that Hiro is normally equipped with, and 71 are the Peasant Clothes. You can change those to have Hiro start a new game with any weapon or any armor you want. Use the link above to find the right hex values to use.

Right after the 02181818181A, you'll see 6 bytes of 00. These are 6 empty spaces you can use for any items you want in your starting inventory.

There are several other places that can be hacked to let you start with different magic, weapons, armor, etc, but all this is getting kind of messy. I'll do some more looking/testing and write a more organized file.

[Tony H]

Cheat Device Software (Pro Action Replay and Game Genie) for Sega Genesis / Mega Drive (including Emulators)
1. Can see the data on the Gen/MD RAM (0000-FFFF)(PAR FF0000-FFFFFF) and Gen/MD ROM Only
2. CanNot see SegaCD/MegaCD (prg) RAM (0000000-00080000).
3. CanNot see 32X RAM
To solve Problem on Emulators is to use External Cheat Device Software like ArtMoney, Cheat Engine, Emucheat, etc.

I've used Cheat Engine before, but it has some limitations when it comes to emulator hacking, so I only use it as a last resort.

[rimsky82]

Cheat Device Software (Pro Action Replay and Game Genie) for Sega Genesis / Mega Drive (including Emulators)
1. Can see the data on the Gen/MD RAM (0000-FFFF)(PAR FF0000-FFFFFF) and Gen/MD ROM Only
2. CanNot see SegaCD/MegaCD (prg) RAM (0000000-00080000).
3. CanNot see 32X RAM
To solve Problem on Emulators is to use External Cheat Device Software like ArtMoney, Cheat Engine, Emucheat, etc.

That depends on the emulator. MESS can see and alter it all.

[lee4]

Try these if they don't work...

HP during battle: 202C62:xx or 202C64:xx

HP updated after battle: 04ED06:xx or 04ED08:xx

I'm not surprised that the PAR codes didn't work. I'm not going to post any more PAR codes for this game because there are too many reasons why SCD PAR codes might not work, so I'm going to suggest using ISO/bin hacks instead. ISO hacks will work, no matter which emulator you're using.

Cheat Device Software (Pro Action Replay and Game Genie) for Sega Genesis / Mega Drive (including Emulators)
1. Can see the data on the Gen/MD RAM (0000-FFFF)(PAR FF0000-FFFFFF) and Gen/MD ROM Only
2. CanNot see SegaCD/MegaCD (prg) RAM (0000000-00080000).
3. CanNot see 32X RAM
To solve Problem on Emulators is to use External Cheat Device Software like ArtMoney, Cheat Engine, Emucheat, etc.

[Tony H]

Lunar Eternal Blue (SCD)

Hawkeyes, after reading some Sega CD RAM info, there is one more PAR code you can try. It's just a slightly different code than the original code I posted. The original code was - HP updated after battle: 04ED07:xx. The new code to try is: HP updated after battle: 02ED07:xx. As long as you don't die during battle, whatever value you put in your code *should* be updated to your HP after a battle. I have no way to test this code, so absolutely no guarantees that it will work.

Here are some ISO hacks that I haven't tested yet (because the intro is too long), but they should work. When I get some time, I'll check them to make sure they work.

Open up your "Lunar Eternal Blue.bin" file with a hex editor. Click on "Find" and make sure it's set to search for hex values. Type in 02181818181A and click on OK (or Find). There should only be one match. These are 6 of the items that Hiro starts a new game with. You can change these values to start with any 6 items you want. For a list of which values to use for different items, look here: http://www.gamefaqs.com/segacd/58796...lue/faqs/36608

When you've made the changes in your hex editor, save and exit. Start a new game and you should see your new items in your inventory for Hiro.

Here's how to change Hiro's starting current and max HP and MP...

Use the same search as before: 02181818181A. If you look 26 bytes before that match, you'll see Hiro's normal starting current and max HP and MP. The values are 00140014000F000F. Change the 00140014 to 03200320 to have Hiro start with 800/800 HP. Change the 000F000F to whatever you want his MP to be. 00630063 would give you 99/99 MP. Save your changes and start a new game.

I think his other attributes are right after the HP and MP values in the bin file. It shows 0502040205060C02 in the hex editor. Try changing those and see if it changes Hiro's stats. It should change his Atk Pwr, Def Pwr, Agility, etc.

Again, I haven't tested these hacks yet, but I'm pretty sure they will work.

EDIT: You can hack all of these into you bin file at the same time if you want.

EDIT 2: The magic that Hiro starts with are right there too. There is a "01" and "0D" in there right after the stat values. You can probably change those to start with any magic you want.

EDIT 3: Remember, after you make these hacks, you MUST start a new game. These hacks won't work on a saved game.

[Tony H]

Genesis Plus GX Can Use 16-Bit Writes,Example:
Sonic & Knuckles Inf/999 Rings FFFE20:03E7

The only Windows port of Genesis Plus GX that I could find wouldn't run on my PC.