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26-04-2021 by admin


GAME GENIE CODES FOR SNES9X EMULATOR ROMS


GENESIS


--
Sega Genesis - Lotus II RECS - Timer Doesn't Decrease
Note: This is my first ever Game Genie code (for Genesis).
In this example, we will find the emulated RAM address for time using Cheat
Engine.
After that, we will find the emulated ROM address that effects the emulated RAM.
And finally we will use a hex editor to edit the actual ROM address (the game
it's self).
So, open Cheat Engine v5.6.1(+), then Fusion v3.64(+).
Use Cheat Engine's option to attach a debugger to the emulator.
http://img202.imageshack.us/img202/9338/attachdebugger.png

Note: Click on an image for it's full size.
Change the value type to one byte.
http://img259.imageshack.us/img259/6468/valuetypeisonebyte2digi.png
Use the emulator to load the attached (below) Genesis game:
Lotus II RECS (UE) [!].gen
Thing to know about Fusion:
Tab key = Reset
F5 key = Save
F8 key = Load
Backspace key = Fast Forward
Pause/Break key = Pause Emulation
Alt+G = Game Genie / PAR / True Emulation Pause
Press start over and over until you are in a race and see a timer on screen.
Once your in the race use the Pause keyboard key to pause emulation.
Press F5 to make a 'clean' save with no RAM/ROM modifications.
You should have 69 seconds to begin with...
http://img407.imageshack.us/img407/2100/pausef569seconds.png

With emulation still paused, use Cheat Engine to make your first RAM scan for
the time of 69 seconds.
http://img34.imageshack.us/img34/5061/firstscanis69seconds.png
Press the Pause keyboard key to resume emulation, but only until the timer goes
down a second, then re-pause emulation.
With 68 seconds showing on the game, make your 2nd Cheat Engine RAM scan for the
new value of 68.
http://img192.imageshack.us/img192/9492/secondscanis68.png

Repeat as necessary until you are down to 2 possible results.
Once you've added the 2 results to your Cheat Engine code list, freeze one at a
time to see which one is the correct address.
http://img10.imageshack.us/img10/3541/twopossibleramaddresses.png
Note: Your address shown in Cheat Engine are likely different than mine...
At this point, you could optionally use Alt+G and CE to convert the emulated RAM
to AR (Actual Ram a.k.a. Action Replay).
http://img808.imageshack.us/img808/1869/ramemulated2actual.png

Now that we have an emulated RAM address for time, let's see what emulated ROM
addresses modifies it.
Since that other useless RAM code will only cause confusion/get in the way, I'm
gonna delete it from the CE code list.
With emulation paused, right-click on the good RAM address and choose Find out
what accesses this address.
http://img689.imageshack.us/img689/9163/whataccessestheram.png
Resume emulation until the debugger shows that something accessed the RAM, then
you can pause the emulator again.
Almost always, there will be 2 addresses shown in Cheat Engine's debugger, you
can go ahead and click the stop button on the debugger.
http://img89.imageshack.us/img89/9140/stopdebuggingif2address.png

Now, you could have earlier, but you should by now un-freeze the RAM code in
Cheat Engine.
You need to watch if the RAM value decreases or not, when testing your ROM
modification.
You wouldn't want false hopes by accidentally leaving the RAM locked.
So do that, un-check the RAM address if you haven't already...
As far as the two address shown in the debugger; usually, but not always, the
first line is reading the RAM.
The second code is usually the one we are after, the address that is writing to
the RAM.
So now we double click the 2nd line, or highlight it and click the button that
says More information.
http://img340.imageshack.us/img340/2756/doubleclickformoreinfor.png
Note: Again; the numbers in the images don't have to match yours...
In the new information box that pops up, ESI will always hold the address that
we are interested in.
If that's not the exact code that we want, it's extremely close.
That address shown is our ROM address, and the last possible one.
If that's not the correct address, you subtract 1 from it until you have the
correct one, you never add 1 to the address.
OK, so with the info box still open click the button add address manually.
Change the type to byte and type in the address at ESI to add it to your CE code
list.
http://img211.imageshack.us/img211/7199/manuallyaddesitoce.png

Now, with the RAM unfroze lets try to NOP (00) the newly added ROM address.
Remember to have made a save, if your ROM altering is no good, just press F8 to
load.
If you press F8 to load and the original ROM byte that you NOP'ed didn't come
back, you'll need to load the game instead (or manually insert the original
byte).
The game instantly froze after pressing the Pause key, so this address is no
good.
Reload the game or whatever is needed to get back to the same spot.
Now we simply subtract 1 from the hex address, never add 1, always subtract.
Actually 9 times out of 10 you'll need to subtract at least 1 from the address
given in the more info box...
http://img263.imageshack.us/img263/7660/subtract1andtryagain.png
So I just modified the code that was already in the CE code list by subtracting
1.
I then NOP'ed that address instead, for a now second try at a ROM code.
I start playing the game (yeah, didn't freeze this time) and watch the RAM
address in CE to see if it decreases.
It never decreases, so the ROM modification is a success.
As usual, I subtracted 1 from the 2nd address given from the debugger for a
successful code.
http://img340.imageshack.us/img340/8927/secondbreakesiminusonei.png

That was all it took for me, but if you still haven't found the correct ROM
code:
1. Keep subtracting 1 over and over. If you do this over 10 tries, it's likely
the wrong base address.
2. Remember how we started with the second break in the debugger, try the
first...
Now, to convert the code from emulated ROM to actual ROM.
This is easy, just right click on your successful ROM code and choose Browse
this memory region.
The top left byte is your ROM code, and the next few bytes after that is what
you want to use to locate the code with the hex editor.
http://img52.imageshack.us/img52/9303/topleftbyteistheromcode.png
So with this window open, we know to search for 4E 75 72 00 30 2C 00 0E EE 48 02
40 FF F8 32 in the actual game.
So open the game with the hex editor and search for that string of hex values...
After locating the string, just replace the 0x20 before it to 00 for Infinite
Time.
http://img257.imageshack.us/img257/7969/patchthe20to00forinfini.png

So after editing the 20 to 00 choose save as to not over write your ROM.
Open the newly created ROM with the emulator without anything changed in CE to
test the mod out.
If you didn't use a program to fix the checksum of the ROM after altering bytes,
just use the option in Fusion to auto fix checksums.
http://img844.imageshack.us/img844/8525/autofix.png

Damn, this game wasn't the best example (that's what I get for making a guide
with my first try).
The game still won't boot, even if you fix the checksum.
Luckily, Tony Hedstrom made a Master Code for this game, to solve the problem.
Master Code (by Tony Hedstrom)
RH9T-860T (0FFFD0:4E71)
Use this code if you get a blank screen.
So, you can try out our hack by either:
1 Input the Game Genie code to bypass the black screen
2 Open the ROM, goto the hex offset 0FFFD0 and type 4E71 to hack your ROM to
bypass the black screen
I can finally play the game and the timer indeed does not decrease.
But, at the same time, I notice a small glitch happening.
Anytime a code works, but not exactly as planed, you should try subtracting 1
again from our ROM code.
In the image above, you can see that before the 20 we patched to 00, there is
already a 00, so we actually need to subtract 2.
Now we'll try to change the 6C to 00 and hope for a less buggy code.
Success, seems to work fine...
So the actual ROM address of 010E95 was changed from 6C to 00.
Since 010E95 ends with an odd number, subtract 1.
After that write down the 2 bytes that we want our Game Genie code to write.
So therefore:
010E94:5300
http://img811.imageshack.us/img811/1943/evennumbers.png
That's the ROM address, you can now convert it to Game Genie.
http://img88.imageshack.us/img88/9881/encryptdecrypt.png



LotusIIRECS(UE)[!].gen

 1. Game Genie Codes For Super Nintendo

Serving 171,589 ROMs For 144 Consoles With 218 Emulators & 9,279 Cheats.
Sections Home Applications Emulators Roms Navigation News Affiliates Downloads.
Game Genie (Unl).zip System Nintendo Nes: File Size: 72.89 KB MD5 Checksum. The
Queue Rom button allows you to add this game to a queue list for later download.
Tutorial about the Super Nintendo emulator, Snes9X, covering the basics and
general troubleshooting. Snes9X Tutorial. Click on Cheat > Game Genie,
Pro-Action Replay Codes. I have some good links to sites where you can download
ROMs. If you want to try to find more sites than what's in my collection of
links, just Google around.

The Game Genie for the Super Nintendo is a gaming peripheral developed by Galoob
in 1992 that enabled gamers to apply cheat codes to their favorite SNES games.
It gave players the opportunity to have infinite lives, unlimited ammunition,
invincibility and many more attributes to help win any SNES game. The Game Genie
functioned by joining together with a Super Nintendo game, and then loaded into
the SNES system. From there, a sequence of digits are inputted to use codes that
manipulated the parameters of an SNES video game.

Insert an SNES game in the slot on top of the Game Genie. Insert the Game Genie
into the cartridge dock of the SNES system. Ensure that the toggle switch in
front is set to the upper position.

Turn on your SNES system and wait for the green light on the Game Genie to
appear. Once the green light shows the Game Genie menu will appear with a series
of numbers from 0 through 9 and letters A through F.

Navigate to a each letter or number using the directional pad. Press the 'A'
button to enter the a letter or number into the code line. Press the 'B' button
to erase the last letter or number entered.

Continue Step 3 until you have entered a code that is eight digits long. You can
input a total of 5 lines of game codes. When you are finished, press 'Start' to
begin your game with the desired cheats activated.

TIPS

If the green light does not appear, that means the toggle switch is set down and
you will start your game automatically without going into the Game Genie code
screen.


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GAME GENIE CODES FOR SUPER NINTENDO

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