Romcenter

I want create a datfile from mame 0.37b16 but I can´t. Why? I´m using the dos command line version, and I also tried whit the windows command line version, but Its the same. What can I do? Can someone tell me where can I find this datfile?

Hi, people, I´m new and I have another Idea, first than nothing, I speak spanish, and I´m still learning english, and I´m not really good, but...

My ideas are this:

1 - If there exist a "missing rom", rc search always in the listed directories to find it, but never in the Achive folder. You can ...