4-in-1 Multirom help

[8bitslasher]

Hi everyone!

I'm looking to make a multirom with 4 NES games I made (the link to my games are in my signature at the bottom). They all use mapper 2(UxROM). Is there anyone that that can help me out or lead me in the right direction? Because this is out of my realm of programming.

Thanks!

P.S. I started to look into this, but got way too confused: https://github.com/ClusterM/coolboy-multirom-builder

[lidnariq]

If they're all UNROM, you "should" use FARID's UNROM multicart: viewtopic.php?t=11099

[Catyak]

I'll basically note that any "multi-cart" ROM builder is going to have some complications because you need to mesh games that weren't designed to go together. This means that making a "multi-cart" with your games isn't going to be a "drag-n-drop" operation. By definition, a "multi-cart" ROM builder needs to make a new ROM, so many of them handle the process in a way similar to compiling a NES ROM.

That said, the builder you linked doesn't support ROM files using UNROM, (aka mapper 2) only MMC3 (mapper 4) and NROM (mapper 0).

If you want to build a ROM file instead of putting the games only on a physical cartridge, you'd need to use a "multi-cart" builder that supports UNROM like the Action 53 "multi-cart" builder:

https://github.com/pinobatch/action53

Even then, it doesn't support UNROM games bigger than 256 kilobytes each, which your games appear to be, but you may be able to build the games at the smaller 256KB size.

EDIT: There is a version of the "multi-cart" ROM builder you linked that should support your games.

[8bitslasher]

Thank you everybody! I did just notice the mapper issue with coolboy right after I posted that. I did see the coolgirl multirom builder, but did NOT notice it might support the mappers I use! Thank you for that. Looking into it now.

[8bitslasher]

Hello. Im still searching around looking into this. Is there anybody that would be willing to help? This is so far out of my programming knowledge that I’d be willing to pay for your services if you know how to do this. Thanks!

[calima]

Are you looking for it to run on emulators, or to sell carts? Because for the latter, you mostly need hw work and only a programmer for the menu (it's also possible to use a hw switch, in which case there will be no menu at all).

[8bitslasher]

It would be nice if it could do both. I’m mostly looking for it to be able to play on emulators with a little menu.

[calima]

Ok, that'd mean combining them into a single 2mb UNROM game. That may be a lot of work, what's your budget roughly?

[8bitslasher]

What do you think would be a fair amount for a project like this?

[calima]

Well, it could take anything from 5 to 30 hours depending on how much surgery has to be done. That's assuming that standalone source exists for all games (that does not need nesmaker); if everything had to be disassembled, that'd add a lot of time. The research alone for how big the surgery is would be 1-2h.

My current rate is 50 eur/h. So that's about the scale for a combined UNROM multirom that will run in emulators and can be burned to existing large UNROM carts. For the custom cart approach, which would not run in emulators, a menu would just take one hour, but I don't do hw so for that side you'd need to ask someone else.

[Cyneprepou4uk]

I can do it for 50$. PM me if you're interested.