[Coco] The DOS command

[Salvador Garcia]

I am curious as to how the DOS command (in Extended Disk BASIC) works. I looked for it and found this charming description in the Quick Reference Guide:

"DOSWith the OS-9 system diskette in Drive 0, the DOScommand boots the OS-9 operating system. "

But I would like to get more technical than this. Does the DOS command always loads a specific sector from the media? If a home made DOS (i.e. anything not from Radio Shack) expects to be loaded with this specific command, what requirements does it need to satisfy?

Is there any literature out there that I can read to better understand what goes on after I enter DOS? Thanks! Salvador