Neo geo Rom weird graphics

barbudreadmon · 29 May 2018, 19:27

@grant2258 I do something similar, i guess the output could get some rework though.

pjft · 29 May 2018, 19:53

I was under the impression that if the crc was wrong that it'd fail to load altogether. Didn't know you'd try to load it anyway. Thanks for the heads up.

grant2258 · 29 May 2018, 20:00

@pjft said in Neo geo Rom weird graphics:

I was under the impression that if the crc was wrong that it'd fail to load altogether. Didn't know you'd try to load it anyway. Thanks for the heads up.

well this is the order

if exists use it
if file doesnt exist search for crc match

barbudreadmon · 29 May 2018, 20:07

@pjft said in Neo geo Rom weird graphics:

I was under the impression that if the crc was wrong that it'd fail to load altogether

That's what i was doing until late 2016, i changed this after unibios author (and cps2 hacker) razoola came posting this issue : https://github.com/libretro/fbalpha/issues/95 .
Basically, when you buy an official unibios, it has a unique crc, so people couldn't use the unibios they bought if crc checking was too strict.

pjft · 29 May 2018, 20:15

@barbudreadmon Wow. Interesting read - I had no idea about Unibios having a unique CRC. Thanks for sharing.

Hellasius · 30 May 2018, 12:25

Thank you for all for your help on this subject. I admit that I am not very comfortable with emulation systems. And you are talking about things that I don't understand (CRC, unibios,...)

@barbudreadmon sorry if I upset you.

I initially download the metal slug 4 and 5 from the same website, and nowhere on the website, there is an indication about a difference about how to use it, That's why I don't understand why I have an issue with one and not the other.

I still don't know what to do.

AndersHP · 1 Jun 2018, 06:55

@hellasius In my view, the only way to make sure that you've got the correct rom from the correct romset, is getting the entire romset and plucking roms from there.

I suggest you get the 0.2.97.43 FBA romset (~11 GB), pick the bios and the game, update lr-fbalpha to version 0.2.97.43 via the RetroPie setup, and try again.

Hellasius · 1 Jun 2018, 06:55

@andershp I tried what you saied, and it works, thank you for your help.

A small other question, is there any way to avoid the green screen when starting a neogeo rom?

AndersHP · 1 Jun 2018, 07:54

@hellasius You're welcome.
AFAIK, the green screen is a self-test screen that the original NeoGeo arcade did when booting up. I just look at it this way, and it just adds to the authenticity :-)

Maybe you can turn it off if you change the mode to UNIBIOS?

https://github.com/RetroPie/RetroPie-Setup/wiki/lr-fbalpha

barbudreadmon · 6 Jan 2018, 09:21

@hellasius said in Neo geo Rom weird graphics:

A small other question, is there any way to avoid the green screen when starting a neogeo rom?

No, this is present in original hardware. I know there is a trick to hide it, perhaps i'll look into it the day there won't be things more important to do in the emulator, which means probably never. I don't mind if someone try to add a core option for this and make a PR though.

@AndersHP no, unibios has it too.