Mednafen PSX core "skip bios"

Libretro Cores
#1

What happen to the “skip bios” option in latest PSX core? Is not there anymore, at least in the x64 windows core

Was a nice feature! PS1 bios is not the pretties in the town…

Will be great if developers add again

Thanks

#2

They removed it upstream because it broke some games.

#3

no way to bring back? a option is just this… a option, no one is forced to use if they dont want, but removing the option, make impossible to use if someone want

#4

It’s gone from upstream, and they don’t even use source control so it’s difficult to read it.

#5

Ah ok thanks for reply, now I understand. Sorry, im old school developer, and all this github stuff/vocabulary is very new for me

I just compile the core for win 64 from latest sourcecode I found in github, and add a skip bios option, just in case someone have interest (the sources changes are inside zip)

http://www.akihabara-online.com/tmp/mednafen_psx_libretro-bios-skip.zip

Hope developers will add again, is a very nice option… I hate the PS1 bios jeje

Grettings

#6

Oh, so you found it, in that case you can just send a pull request with your changes and it will be added back, it seems quite easy I guess noone bothered to look at it. Added your changes, if you want credit or whatever add it to the header and send a pull request Thanks!

#7

Does it still break games?

#8

It breaks a really small percentage of games IIRC. I think SaGa Frontier and a few others? You can turn skip BIOS on as the default and then save a per game core options file with it disabled for any games that it breaks.

#9

[QUOTE=Radius;32148]Oh, so you found it, in that case you can just send a pull request with your changes and it will be added back, it seems quite easy I guess noone bothered to look at it. Added your changes, if you want credit or whatever add it to the header and send a pull request Thanks![/QUOTE]

Greetings, i will do some other changes, and when i finish, i will do a pull request (first i need to check what a pull request is…jaja). Maybe if they found the changes are useful they can add back

thanks

Hi, if is only a small percentage of games, then it will be more easy, just to do a small database in the core, and force the bios loading for this games

I dont think will be difficult, since PS1 games have a unique id (i believe)

If you know where to get a list of problematic games when bios is skip, i will do the database, and add to core

Thanks

#10

[QUOTE=theelf;32191]If you know where to get a list of problematic games when bios is skip, i will do the database, and add to core

Thanks[/QUOTE] I only vaguely remember a post on the Mednafen forums about some games that had problems with it, but I can’t find it. I tested the US version of SaGa Frontier and you get a black screen with sound if BIOS skip is enabled. With it off it works fine.

#11

Oki, i just tesd SaGa Frontier, and change a little the code for the skip bios option. If detect this game, the core always load the bios

Here is the new core, if someone want to try

http://akihabara-online.com/tmp/mednafen_psx_libretro-bios-skipV1.zip

#12

[QUOTE=theelf;32200]Oki, i just tesd SaGa Frontier, and change a little the code for the skip bios option. If detect this game, the core always load the bios

Here is the new core, if someone want to try

http://akihabara-online.com/tmp/mednafen_psx_libretro-bios-skipV1.zip[/QUOTE]

That was great. Thanks!

Another good option that was removed is the possibility to disable dithering. I’m not sure why it was removed, maybe because because the dithered image is how it looks on the original hardware ( a matter of accuracy for the sake of it ), but this was just a limitation at the time and it looks so much better without dithering. And there is absolutely no reason to use dither if you are rendering Playstation games in 32bit colors. So, why not an option to disable it?

Would you please mind to take a look at the code to see if it’s possible to restore the option to disable dithering?

#13

The games (or their PS1 versions, at the very least) were designed with this in mind. Dithering creates more perceived colors when there’s an inability to have them appear in-game. Since people were typically expected to play these games on their CRTs with composite filtering, developers took that to their advantage and used it heavily to make viewable greater detail than would actually be possible. It might seem odd on the surface, but the games actually look worse without dithering (and the accompanying CRT/composite filters to make the dithering make its intended effect). You remove the dithering, you remove visual effects that would have otherwise appeared. It’s the same for many consoles that used the technique.

That doesn’t excuse not having the option to disable it if desired, though. I agree that it should return. It should be easily possible to implement, but I don’t really know if it is.

#14

The problem of apply a effect that is not in the original hardware, is believe that everyone will play the game in a modern screen. Im still play in CRT, and i just want the image as much clean possible

This mistake is very common now, like force the aspect ratio on some emulators because the developer believe everyone is using widescreen TFT, when if you use a CRT is the screen the one that give the correct aspect ratio, whatever the resolution you use

#15

[QUOTE=theelf;33907]The problem of apply a effect that is not in the original hardware, is believe that everyone will play the game in a modern screen. Im still play in CRT, and i just want the image as much clean possible

This mistake is very common now, like force the aspect ratio on some emulators because the developer believe everyone is using widescreen TFT, when if you use a CRT is the screen the one that give the correct aspect ratio, whatever the resolution you use[/QUOTE]

I’m also playing using a CRT TV. But since I’m using a RGB video connection (and not composite cable), dithering is very apparent and looks horrible.

#16

So I don’t make a new thread for a simple question, I will post it here:

What is the difference between Beetle and Mednafen?

#17

There is no beetle anymore.

#18

Ah, OK. It sucks then that the core updater of the stable 1.3.0 gave me only that core for the PSX. I had to get the Mednafen one myself fromm the nightlies. (I wanted the internal resolution option)

#19

whaaaat? I don’t think we have stable cores

#20

I mean I extracted the 1.3.0 stable Retroarch and the core updater had given me Beetle PSX. The next day I got the Mednafen one from the nightlies manually after I saw people talking about core options that I didn’t have available…