Okay, forgive my foolish newbiness, but I'm curious about something here.

I decided to change the shift key on my left sided keyboard to caps lock.

Now the keyboard is working all peachy even though letters aren't capitalized like they should be.

This has got my little pea size nut for a brain asking, "Why is this?"

I did a little test and made a blank mapper.txt with nothing in it and used that in Dosbox.

Know what happened? None of the keys worked and then it finally crashed all squibby like. Joy!

So why did that get me all punchy?

Well, if you look at the mapper.txt file all that's accounted for is
key_a "key 97" through key_z "122"

I'm not seeing anything like key_A or key_Z (capital letters) in the mapper.txt file.

Could it be this easy? I know I'm easy. But hey, I never got a disease I didn't earn!

So if Dosbox crashes when you press a key that isn't defined, could this explain the behavior because capital letters aren't defined in the mapper.txt file?

If this turns out that I'm on to something here, you are all my witnesses!