sega cd and sega 32x

[nighthawk]

i do know you can hack with hex editor but i have a quition how do you convert the par into hex or the raw or the game genie
like this code i want to add to my sonic cd

FF0F20:7F00 how do i find the value so i can replace it
this is the code
Have All 7 Time Stones/Good Futures

sence the value has change how do i find where it is

[Tony H]

I wrote a guide that explains how to use a PAR code like that to help you make a Game Genie code (raw ROM address). Don't remember if it works with Sonic CD, so try it and find out.

http://codehut.gshi.org/GensTracerGuide.txt

Also, another method that may work is to just use a hex editor and search for FF0F20 in the ISO/BIN file. If you see a 33FC right before it (or similar instruction), then this might be what loads the initial value into the game. You can then change that value to whatever you want with a Game Genie type code. You can also look for other values right before it that can give you a hint as to what it does. Some 68000 assembly knowledge is helpful here to recognize what the numbers/letters mean.

[nighthawk]

but if i dont know where to replace the address i know what the code i need already will that still help me i am also tring to conert the par in to hex32x in to the rom too

[nighthawk]

is there any youtube videos that can show me how to do it that would help alot i am not good at reading i understand if it shown though

[Tony H]

is there any youtube videos that can show me how to do it that would help alot i am not good at reading i understand if it shown though

I've never looked. I'm pretty sure YouTube has a search option.

[nighthawk]

well if you get a chance can you try and make a ips for this code
Have All 7 Time Stones/Good Futures
FF0F20:7F00
or a easyer explanation to just find hex and then hit replace
i am useing hex workshop full version

[nighthawk]

i got it to work in a 32x on emulator how do you fix the check sum of the game

[Tony H]

i got it to work in a 32x on emulator how do you fix the check sum of the game

Which game?

[nighthawk]

doom 32x still cant get the sonic cd to work on emulator any see i test it on emulator then i try on the mega everdrive

[nighthawk]

well now i used ESE_FixCheckSum this now the checksum is fixed it says and no worning in emulator but dont work in mega everdrive it was alot easyer with CCCGP for sega master system to add to rom lol

[Tony H]

Try this for Doom 32x

07CC:6002
32x Master Code. Must hack this code into your ROM. Go to ROM address $07CC
and change the B446 to 6002. Not needed with Kega Fusion.

=======

If it doesn't work on your Everdrive, try this one...

018E:0000

Read a post by Chilly Willy a while back that said the 32x will ignore the checksum if it's all zeros. This was for development cartridges.

[Saturn025]

Hi, sorry to rehash an old thread but I've been trying fruitlessly to find the same info originally asked:

i do know you can hack with hex editor but i have a quition how do you convert the par into hex or the raw or the game genie
like this code i want to add to my sonic cd

FF0F20:7F00 how do i find the value so i can replace it
this is the code
Have All 7 Time Stones/Good Futures

sence the value has change how do i find where it is

Is there a method to convert par to hex? I've tried using the guide but don't know what I'm doing, also have searched for FF0F20 among others and produced hundreds or hits. None of which had something preceeding it that I would know is useful:

I wrote a guide that explains how to use a PAR code like that to help you make a Game Genie code (raw ROM address). Don't remember if it works with Sonic CD, so try it and find out.

http://codehut.gshi.org/GensTracerGuide.txt

Also, another method that may work is to just use a hex editor and search for FF0F20 in the ISO/BIN file. If you see a 33FC right before it (or similar instruction), then this might be what loads the initial value into the game. You can then change that value to whatever you want with a Game Genie type code. You can also look for other values right before it that can give you a hint as to what it does. Some 68000 assembly knowledge is helpful here to recognize what the numbers/letters mean.

Youtube (and internet searches in general) have produced nothing w/ the search criteria of "PAR to Hex convert" and similar, at least that I could determine:

I've never looked. I'm pretty sure YouTube has a search option.

Even read this page hoping it would be a lead but no dice. I want to convert these to hex for an easily editable ROM hack but losing hope fast. Is there a tutorial for converting RAW data or PAR to Hex? Would love to learn how to do this.

Thanks

[rimsky82]

That PAR code you have there is a RAM address, it is not located anywhere on the disc. What you, or someone with experience, will need to do is figure out how to manipulate the ISO to write the values you want to that address.

This question has been answered probably 287 times, in 287 different ways in this forum.

[Saturn025]

Ok thanks. Was searching for an answer that I could understand or an easy way to make it happen. I'm not close to the level most of the peeps here are and am just casually finding hacks for games to make them easier to play for my young niece. Figured Sonic CD would be great fun but all my attempts at Invulnerability/Invincibility using Kega Fusion with Cheat Engine have produced an invisible Sonic so was looking for other resources to port existing codes (and have a definitive answer here so people wouldn't repetitively ask.) Had hoped there would be a simple step by step walkthrough somewhere for noobs since it seems to be such a valuable tool/process.

lates

EDIT
I didn't have the link handy at the time but essentially looking for or to make codes like keeper7's here. Have these been posted somewhere or multiple times? If so, I've missed them during my many searches along with 285 of the explanations mentioned above lol. If these haven't been created (or shared) why not? At least I'm trying to do something in this area. May not have all the tools/knowledge but I will soon enough. Thanks for all the help ; )