SEGA CD Stuck on "Checking CD"

[Former user]

Original issue 342 created by forgottensonsofsteelriver on 2013-06-07T06:37:56.000Z:

First let me say that GENPLUS is awesome. I just downloaded it and It's great. Having a little issue with some of my Sega CD files though:

What steps will reproduce the problem?
1.Loading my Sega CD Games
2.I use ISO files
3.i click the ISO file

What is the expected output? What do you see instead?
Anyway about half my games so far (including Dune, Time Gal and Sonic CD) just stay on the "checking CD" screen. Other games I've tried load instantly

What version of the emulator are you using (official, SVN revision,...)?
whatever one is available on Homebrew browser as of yesterday

Please provide any additional information below (Emulator settings, Console
iso files are in a sub-folder with music files (mp3 i know they should be wav but i haven't had a chance to switch them yet) and original rar that it was extracted from (each game has its own folder)
setting,...)

[Former user]

Comment # 1 originally posted by ekeeke31 on 2013-06-07T08:29:24.000Z:

I don't know what to tell you, all games should load and works fine, in iso or bin format.

The "checking disc" message means the bios is locked while accessing the disc image.

Just make sure you have a valid CD Bios for each 3 regions stored in /genplus/bios, not the same bios renamed 3 times differently. Please note that there is a bad dump of Sega CD US Bios floating around. You could try with different bios or manually load the one you are using (like a normal rom) and report the infos given in the "info" window in main menu.

It's also not clear why some of your iso work and some doesn't. Make sure they are valid uncompressed iso files, again please report fields returned in the "info" window after you loaded the iso file.

[Former user]

Comment # 2 originally posted by ekeeke31 on 2013-06-07T19:48:55.000Z:

Also check if those .iso files come with .cue files: the emulator will automatically load associated .cue file to retrieve infos about audio tracks if a .cue file with the same name exists in the same directory as the .iso file (ex: sonic.iso and sonic.cue). If the .cue file is invalid or points to unsupported audio tracks (like .mp3), it shouldn't theoretically cause any issue and should simply be ignored but you never know...

[Former user]

Comment # 3 originally posted by ekeeke31 on 2013-06-09T09:28:57.000Z:

[Former user]

Comment # 4 originally posted by forgottensonsofsteelriver on 2013-06-09T18:51:05.000Z:

Thanks for the suggestions. I re- extracted the bios and the Roms and got a lot of them working. Great program.