CHD games not working for Sega CD.

mitu

@Krytern The error I see is

[...]
[libretro INFO] INFORMATION - Loading 0 bytes ...
[ERROR] Failed to load content.

which means RetroArch cannot read the file or the .chd file is empty ?
How large is the .chd file ?

Krytern

@mitu It is 317MB

mitu

@Krytern I wonder if it's because of the older version of RetroArch - is there a reason you haven't updated it ?

Krytern

@mitu I didn't realise I was using an old version. I've just updated retropie-setup script and the stuff in there, including RetroArch but I am having the same problem. Here is the new log: https://pastebin.com/7x42EY9A

mitu

@Krytern The new log is not very different than the old one. Is there a way to check if the CHD is valid - maybe load RetroArch on your PC ?
I'll check one of my CHD on the Pi system I have, to see if there's some emulator related error, but I doubt it, there haven't been any major changes at all in the Libretro core in the last months.

Krytern

@mitu Looks like it is a problem with the CHD file. I used CHDMAN from the wiki on this site and it didn't give any errors so it is strange I am having issues.

mitu

@Krytern Did you test it on the PC ? You can run chdman -i info <chdfile> to see what CHD version is used.

Krytern

@mitu Yes I tested them on PC and they aren't working on PC either so definitely seems to be a problem with the files themselves. Here is a pastebin of the info command: https://pastebin.com/s6g48Nr7

RVA-818X-LAYstar

I need to post the solution to this issue as it affected me as well:

If you have:

Checked you have the correct BIOS files in the correct place.
Checked you have the CHD files correctly created (i.e. install retroarch on your PC and run the CHD file in genesis-plus-gx - if it works, the file is OK).

But your Sega CD games are still not playing and just crashing back to game select screen after the runcommand screen. Then here's the answer:

Go into retropie setup and update all packages.

That's it. It's that simple. After that, your CHD games should work and you can save a huge amount of space on your sd card.

DreamcastKid

@krytern said in CHD games not working for Sega CD.:

Looks like it is a problem with the CHD file.

sounds like you may not have converted it properly.

I downloaded Sonic CD to test ...

Firstly, you need to use CDmage (V1.02.1) to convert the 35 *.bin file tracks of Sonic CD into a single *.bin before you can use CHDMAN

after that you will have just 2 files ..

Sonic CD (USA).cue
Sonic CD (USA).bin --------- which is 587,601KB in size

after running CHDMAN

Sonic CD (USA).chd --------- 329,386KB

which is approx 12MB larger than your 317MB file

Tested it with my setup, and it works fine