console driver and keymaps

[User Elisej]

How to understand and write keymaps?
Is this any document besides kbdcontrol(1) and kbdmap(5)?
The later two is not enought for me.
After reading of these two I have many questions. E. g.:
How to make "Alt+a" acting as sequence "Meta a"
"Alt+a" acts in other way, than "a" pressed after the key acting as "alock". So, what is alock?
How kbdmap affects on LEDs?
Should I describe scan codes 128-255?
and so one and so forth.

Elisej Babenko
mailto:a at zeos.net