SEGA CD Stuck on "Checking CD"

[GoogleCodeExporter]

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,...)

Original issue reported on code.google.com by forgotte...@gmail.com on 7 Jun 2013 at 6:37

[GoogleCodeExporter]

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.

Original comment by ekeeke31@gmail.com on 7 Jun 2013 at 8:29

[GoogleCodeExporter]

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...

Original comment by ekeeke31@gmail.com on 7 Jun 2013 at 7:48

[GoogleCodeExporter]

Original comment by ekeeke31@gmail.com on 9 Jun 2013 at 9:28

• Changed state: Invalid

[GoogleCodeExporter]

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

Original comment by forgotte...@gmail.com on 9 Jun 2013 at 6:51