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KMFDManic / NESC-SNESC-Modifications

All of your NES-SNES-Playstation Classic Modification Needs!
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NEStopia Cheats $6000-$7FFF Memory Range #179

Closed lowbred closed 5 years ago

lowbred commented 5 years ago

Step 1: Describe your setup:

Step 2: Describe the problem:

Is it possible to access SRAM addresses $6000-$7FFF with any NES core? If not, is this something that will be soon or in a future release? Big THANK YOU KMFDManic for all your YouTube vids! Informative and entertaining.

Notes: Are you in the right place?

Hope so...

KMFDManic commented 5 years ago

What sort of cheats are you attempting to pull off?

lowbred commented 5 years ago

There are many games that implement cartridge RAM... I'm sure you know. One specific cheat would be "Inventory Modifier..." for SMB3 / https://gamehacking.org/game/31021 The desktop v's of Nestopia and FCEUX allow access to this memory range. For the first time, after creating this thread I tried the desktop v of RetroArch and with all the NES cores there was no access to the memory range. If this is a limitation of RetroArch and or the cores it would be a great addition to one or the other or both.

lowbred commented 5 years ago

RetroArch cheats allow... cheat??_address = "??" The RAM address for "Inventory Modifier..." for SMB3 is 7D80:??, that hex is then converted to decimal = cheat??_address = "32128" I hope I'm correct and RetroArch doesn't use some other conversion above a certain memory range. With all the research I did with google, I couldn't find any info to make me think otherwise.

KMFDManic commented 5 years ago

Was finishing up with work and another Update. Did you, by chance, try manually patching codes like these to the games, then attempting to run them with the Cores? Just curious. This will take a little more looking into to see how it would behave.

lowbred commented 5 years ago

Always something to do, right. I've never made a patch for a NES game. It's something I may research into. I figured I would go right to the man who taught me everything I needed to know about the mini classics, if it's not possible to do this as of yet... I'm glad I have your wheelhouse going a bit :) and hope it will be implemented in a future update. Thanks.

KMFDManic commented 5 years ago

@lowbred I am referring to something more akin to GGGuy (Game Genie Guy), a tool that will allow you to patch codes permanently to NES roms, etc. Some cheats did not work for Turbografx-16 on the Mini Classics. So, I devised that workaround to account for that:)

https://hakchi.net/KMFDManic/NESC-SNESC-Modifications/KMFDManic-S-NESC-PSC-Cores_6-15-19/_km_Xtras/PERM-CHEATS-PATCHING/

Just because a Core may possibly not support certain values, does not mean you can't apply them elsewhere and still run the games on said Cores. You aren't changing the mappers:)

lowbred commented 5 years ago

@KMFDManic "This will take a little more looking into to see how it would behave." I'm gonna give this a go and give you an update. Off topic... RA 1.77 clover pop-up message in the lower left corner "Nintendo Clovercon #1 configured in port #0... Is there a way to adjust the position of this pop-up message like the notifications from RA? I searched reddit and I seen you replied to a couple posts about disabling it, do not want to do that. I use the mini on my TV and the left side and the lowest part of the font is just off-screen.

KMFDManic commented 5 years ago

Check for an overscan or aspect ratio setting on your tv, as it should display it all.

lowbred commented 5 years ago

Duh... Me over thinking it maybe just a little... Always had it on 16:9, there was a 'Fit to screen' setting. Thanks :) I'll get back to you by the end of the weekend.

lowbred commented 5 years ago

GGGuy was a no go. It's a dumbed down cheat system RA has. It would be nice if Libretro develops a more advanced cheat system but it's not something that is a must "game changer." Pun intended... I'm out of ideas, if you have any other suggestions, let me know. Otherwise, I think this thread can be closed down. I'll keep YouTuning in. Thanks.

KMFDManic commented 5 years ago

@lowbred Two things you can do. One, open up a "feature request for this" on RetroArch, Nestopia Repos.

https://github.com/libretro/nestopia (rdanbrook) is great!

https://github.com/libretro/RetroArch (in the event it needs done RetroArch wise, like last years cheats overhaul!)

Either way, despite cheats being low priority...there is still a chance it could be worked in, if it doesn't already exist...in some capacity:)

Good luck, and hope this suggestion works out:)