Unibios help

I have Unibios 1.2. It seems that whatever region I run it in I get blood and bounce in KOF games. While this isn't a problem I'd like to know why it happens. I don't have Metal Slug or SS games to test this with aswell.
Thanx.

In MVS mode, the blood is turned on in the soft cartridge settings from the test menu.....

The AES mode is region specific....

Thanks Norton I never knew that, well I knew about the soft dips but I never realised it wasn't region specific. Great I'll be keeping Europe mode on all the time then.