🚀 go-pugleaf

I am kind of curious how the non-dos format disks work, and how the
boot block works into this.  If the disk is nonstandard, how does the
machine read it?  In fact, how does it manage to read the boot block if
it has not had the read-format defined?  How would I go about writing my
own format of data on the disk?

Where is the boot block located, as a physical track/surface (for use
by a disk editor to look at it)  What does it do?  Does anybody have a
disassembly of it?

Enough questions?  Any expertise at all would be appreciated.
Thanks.