Here's what I've been able to figure out about how the .rb file is put together.
There is now an rbmake project over at sourceforge.net. The project is a "book maker" for the Rocket eBook, and it consists of some command-line tools (for assembling, disassembling, and testing .rb files), and a library of routines for linking into other programs (all written in C). You'll find a link to the rbmake home page on its probject page. The home page introduces you to the tools, the library routines, and helps you get started.
Feel free to with any questions or comments you may have.
Return to my home page.