I'm wondering, if there is some kind of development guide. I'd like to write some extensions to tomato, but I don't know how to start playing with that. For the beginning I have following questions:
1. After making some changes - is there any way to test it without compiling new image and upgrade router's firmware. I'd like to avoid bricking device in case of failure
2. In *.asp files I found functions like <% ident(); %>, <% nvram(''); %> or <% css(); %>. Where can I find descriptions of that and how can I add my own.