Sega Mega CD ISO Hacks & Editors

[47iscool]

Codes That "King of Chaos" Made For Sonic CD Work Perfect In Genesis Plus GX For Wii,Haven't Tried The GC Version.

[hawkeyes]

would it be possible to hack Lunar: Eternal Blue(usa) and if so would someone post codes for this such as:
max gold
inf hp/mp
item modifiers

thanks in advance!

[47iscool]

Well Mr. Hedstrom, I Know One Emulator That Can Use SEGA CD PAR Codes,& That's Genesis Plus GX For Wii & GC

[Helder]

Could we also release patch files to patch the ISOs with? or will that bee to much work or troublesome? his way it takes the complicated part out and then anyone can use the hacks.

[Mezmorize]

After Burner III

After Burner III

Infinite Planes
Search For: 16B067046000FF344A38F7AD672E5338
Replace With: 16B067046000FF344A38F7AD672E6002
There is 3 instances of this string. I only patched the first instance and was able to beat the game.

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AH-3 Thunderstrike

Infinite Missiles
Search For: 42AD00026100012E4A3860D266045338
Replace With: 42AD00026100012E4A3860D266046002

Infinite Rockets
Search For: 42AD0002610000E24A3860D266045338
Replace With: 42AD0002610000E24A3860D266046002

Less Damage
Search For: 426D0000244E4EB90000D52055790001
Replace With: 426D0000244E4EB90000D52055790000

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Amazing Spider-Man Vs The Kingpin, The

Infinite Web
Search For: 004C197C000500086074302DD74A916D
Replace With: 004C197C000500086074302DD74A6002

Infinite Life
Search For: 2F0C486DD8224EAD0C22102E000F912D
Replace With: 2F0C486DD8224EAD0C22102E000F6002

Invulnerability After Taking Damage (Blinks)
Search For: 486DD8224EAD0C724A6DD836584F6F08
Replace With: 486DD8224EAD0C724A6DD836584F6008

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Android Assault: The Revenge of Bari-Arm

Infinite Planes
Search For: 5339FFFFE62064064239FFFFE6205378
Replace With: 5339FFFFE62064064239FFFFE6206002
14 Instances (The first instance was for the first stage, I take it there are 14 stages.)

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Annet Futatabi

Infinite Health
Search For: 4E716000FD127600363900FF40A89779
Replace With: 4E716000FD127600363900FF40A86004
9 Instances.

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AX-101

Infinite Shield
Search For: 42813239000701204EB90000A81433C1
Replace With: 42813239000701204EB90000A8146004
The second instance.

Infinite Bombs
Search For: 4A79000701226F184EBA001866125379
Replace With: 4A79000701226F184EBA001866126004

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[Tony H]

Road Rash (U)

Start on any level in "Big Game Mode"...
With your hex editor, search for the 1st occurrence of B633FC0001. Change the 01 at the end to what ever level you want to start on (up to level 5).

Raw code = 015E78?0001:000x (x = 2-5)

[Tony H]

Good news... Wild Thing 2000 is now available in Road Rash (Sega CD). To the best of my knowledge, it wasn't previously accessible.

Start a new game with Wild Thing 2000 (the secret bike). It is the fastest bike in the game (200 MPH + Nitro), and it will never slide out. Just select "Big Game Mode" and pick any character...
With your hex editor, search for 10B433F00002. Change the F00002 to FC000F.

Raw codes = 017E8A?33F0:33FC and 017E8C?0002:000F

[Tony H]

Took me forever to figure out the money RAM address. Those sneaky bastards removed the last digit for all the prices and how much money you have. So if you had $750, you would actually search for 75 (in hex).

Road Rash (U)

Can buy any bike, even if you don't have enough money...
With your hex editor, search for 10A26E00. Change the 6E00 to 6002.
Raw code = 015F5A?6E00:6002

[Tony H]

Using this version of Gens you can enter cheats like this:

[COLOR="#0000FF"]Final Fight CD - Sega CD[/COLOR]

Semi Hit Anywhere
2100E6?6600:6000

Invincibility
21054A?6600:6002

nolberto, there are 4 different emulators at that link. Which one lets you enter SCD codes? I tried Gens11svn304, but didn't work with that one.

[Tony H]

Road Rash (U)

All the tracks are straight. Very useful when using the high top speed hack. It's a lot of fun flying off jumps at 230+ MPH...
With your hex editor, search for 1A4E756100. Change the 6100 to 6700.
Raw code = 022B1A?6100:6700

[Helder]

Stickyed both threads based on SegaCD if anyone disagrees to them being stickyed we can discuss it, but I think in the meantime these are important enough to sticky in this Forum.

[Tony H]

rimsky, I won't add the raw code to the db for now per your instructions in the other post.

Road Rash (U)


NOTE: I found that the only way Road Rash will work is if you have "Perfect sync" enabled (Fusion, Gens, etc).


No traffic...
With your hex editor, search for 2080002540. Change the 2540 to 6006.
Raw code = 03191A?2540:6006


Make the 125 Perro Pico bike accelerate much faster. You can buy the Perro Pico bike in the shop, or pick Pearl or Slim as your character...
With your hex editor, search for 0022001C00150012000F000C. These are the values used to determine the acceleration in each of the 6 gears. Change them to this to accelerate much faster: 003E 0038 0033 002E 0028 0023. Don't include the spaces. You can use higher numbers if you want. Keep in mind that your top speed will still be 113 MPH unless you use the hack below.


Make the 125 Perro Pico bike have a much higher top speed...
With your hex editor, search for 26D02C24. Change the 2C24 to 38A4 for a top speed of 145 MPH. Change the 2C24 to 4650 for a top speed of 180 MPH. Normal top speed is 113 MPH. If you are going to use a very high top speed, it's highly recommended that you use the acceleration hack too, or else the bike will take a looong time to accelerate to top speed.

Here's the formula to figure out your own top speed. Take the top speed you want and add two zeros to it, then convert to hex. Example: for a top speed of 215 MPH, 21500 converted to hex = 53FC.

[Tony H]

If you figure out the exact ranges for rom and ram, let me know.

Will do. Also, any chance we can have this thread sticky-ed? There are some ISO hacks already posted (including some I'm currently working on) that I can't figure out how to get them to show up on an asm trace, so I can't make a raw code for them (so I can't add them to the db). Or instead of sticky-ing this, maybe make a new section in the db for the ISO hacks. Maybe just a single box to type in the instructions for the hack? Just don't want all the ISO hacks we've all made to get pushed back out of sight in the forum. I know that Mez had a post with a TON of ISO hacks/patches for SCD and they have been out of sight for a long time.

[rimsky82]

I've been looking at documents and source code for a while. I found some ram codes for sonic cd that are in the 0xFF0000 - 0xFFFFFF range, which is the same as genesis, so I assumed that was it.

If you figure out the exact ranges for rom and ram, let me know.

[Tony H]

I suppose I could assume it's a RAM address and do a memory trace on it and see what shows up.

Well, it appears to be a RAM address...

TRACE STOPPED

[00:1DDA] W16 = 1123 [0396B8]
[00:1DDA] W16 = 1133 [0396B8]
[00:1DDA] W16 = 0000 [0396B8]
[004BE] W16 = 0000 [0396B8]
[01:1DE2] W16 = 0005 [0396B8]

TRACE STOPPED

[01:1DE2] W16 = 0005 [0396B8]

TRACE STOPPED

but I can't get it to show up in an asm trace log. Time for more reading. Shit.