Imported cheatcodes which "modify" read-only domains are silently blocked

Its seem that any game genie, raw or pro action replay code that change something in the rom (Health, move damage , background selection, music change, etc.) are ignored by Bizhawk, but some Action Replay code such as changing character animation on the fly or simply glitch the RAM works.

I did the test with Mortal Kombat II on Bizhawk 2.2.2 (the last one that allow cheat converter for SNES). Even if I go with raw address in the latest version, changing value in the ROM doesn't seems to work.

[NarryG]

Cheats can only affect domains that aren't marked as read-only. The ROM is read only so it can't be modified.

Oh i see, thanks for the clarification. So it mean that it is only possible for those kind of Game Genie code to work on real hardware, since the game genie ROM is run before applying it to the rom itself?

[NarryG]

If you use the 1.X branch cheats should work fine as the domains aren't marked as read-only.

Thanks, ill look into those.

[g0me3]

it can be modified in bizhawk but only if you use "options-cheats" menu and select the ROM memory domain first.

the problem is, the GG codes does not apply to ROM domain, but system bus which is useless. the whole cheat system in bizhawk is broken somehow.

there also the problem, that ROM domain cheats couldn't be discarder when you "disable" the cheat option lol. they are permanent

even more, when you use "compare" option for cheat entry, you can't change the entry one more time, because it is already change for the first time with the right compare value, but then value is changed
and compare does not work anymore for the same address unless you reset the emulator lol

the cheat system doesn't even broken. it is just badly designed for now.

[g0me3]

I mean, in bizhawk, the GG converter-import does not aware about memory domains and apply to system bus... which does not work in case of ROM memory in general... so you must use other ways to apply the cheats t hen -> manual decode the GG code, find an actual ROM offset, and enter it in the cheats window for the ROM domain..

The Game Genies codes I am trying to apply are in the 800000 ranges

For example, to have infinite time, the game genie code is
6DC7-1DAA

With a Game Genie converter, it give
83A133 80

I can only apply it to the System BUS, it is not in the range of the other options

[g0me3]

this is the rom domain. won't work via GG codes conversion for sure.

[g0me3]

cheats does not work with system bus at all in bizhawk as I told before, this is just because the domains aren't meant to be used there at all. the whole cheat system need to be rewritten (as well as debugger)

[g0me3]

so just use the cheats window and set the address/domain manually... (this is applicable for any other system, though, but for snes it seems it broken even badly because I just not sure how to enter the correct snes 24 bit address there lol (any clues?)

Im not quite sure to understand what you mean. I did put the cheat manually in their address form, but in the snes case there is no ROM option. Cheats in the 700000 range does work thought. I did some other testing with Mortal Kombat 1 and the following game genie code : D861-14DD (address : 808168 0B). Ive manually put it in the cheat windows

This one is suppose to bring you to the fight against Shang Tsung as if you have already defeated Goro

It still doesn't work, but it does work in ZSNES

Have to admit that I have very low knowledge of how cheats work, I was used as how ZSNES was working with the cheats when I used to record on it, but that emulator is too oudated now.

I also tried to use the 1.x branch (particulary 1.18.1) and it doesn't seems to work either

[alyosha-tas]

BizHawk's cheat tools have not aged well unfortunately. I'm not really sure what can be done about it for non-native cores. Even for native cores proper implementation takes considerable work. I think only NESHawk does it totally correctly (ie you can turn cheats back off as desired.)

[hegyak]

The problem is how Game Genie cheats work. They affect or effect the ROM itself. Not the ROM file your using on your PC, but the Memory loaded ROM data for the game. To do this, they edit the ROM Bus. But BizHawk doesn't allow this anymore. I don't recall the exact reason why though.

If there's something I need to edit/change for the RAM address(es) that has to be done and I can use a different Bus to recreate the same effect as editing the ROM Bus, please @hegyak to let me know ASAP. I will get the code and work on the Code Importer again to make it work.

[vadosnaprimer]

Why are you talking to yourself <_<