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Main => Software Forum => Topic started by: ancient333 on February 21, 2025, 02:22:31 pm

Title: How to modify MAME to bypass checksums?
Post by: ancient333 on February 21, 2025, 02:22:31 pm

Hi all

After many many years of not playing games, I learned of one of my favourites NBA Jam TE (modded with Jordan)

I have manged to get it running all ok launching it via cmd etc, however I also seen that there is a way to launch it direct via Mame without any prompts or errors.

I believe this is by modifying Mame to bypass the checksums.

Can anyone please provide a guide on how I can do this please? (I am a novice)
Although I have kindly been provided a modified exe, I would love the ability to do it myself, for any future releases/updates.

Any info would be greatly appreciated.

Title: Re: How to modify MAME to bypass checksums?
Post by: Fursphere on February 21, 2025, 07:05:46 pm

Sounds like something you'd find on HBMAME

Title: Re: How to modify MAME to bypass checksums?
Post by: PL1 on February 21, 2025, 10:35:51 pm

Quote from: Fursphere on February 21, 2025, 07:05:46 pm

Sounds like something you'd find on HBMAME

Good call, Fursphere.

Looks like this mod is called "NBA Jam Rewind" -- two versions are now in HBMAME versions 0.245.20 and newer.

https://github.com/Robbbert/hbmame/blob/master/docs/release/docs/hbnew.txt (https://github.com/Robbbert/hbmame/blob/master/docs/release/docs/hbnew.txt)

Quote

2024-06-20 0.245.20
. . .
- [nbajam04]            NBA Jam Rewind (rev 1.2)

. . .

2022-08-26 0.245.4
. . .
- [nbajamre]            NBA Jam Rewind (rev 1.1)

Quote from: ancient333 on February 21, 2025, 02:22:31 pm

Can anyone please provide a guide on how I can do this please? (I am a novice)
Although I have kindly been provided a modified exe, I would love the ability to do it myself, for any future releases/updates.

Robbbert maintains HBMAME so all you need to do is download it from here.   ;D
https://hbmame.1emulation.com/ (https://hbmame.1emulation.com/)


Scott

Title: Re: How to modify MAME to bypass checksums?
Post by: Robbbert on February 22, 2025, 04:10:53 pm

This question was cross-posted on reddit 9 days ago.

Obviously mame can be hacked to remove checksum warnings, but they are there for a reason.