I know how to code on the atmos/fdc, what are the changes ?

$2fa is used.

The best way to have code working on all telestrat is to get Vectors from real vectors ($fffx)

Switch off Timers

Switch off timers of the second via. But orix, switch off second via, when it starts a program. It means that date command is not updated

What should i know before coding ?

Don’t build your code below $800 or else you will erase orix directory/prompt management

You can use page 0 $d0 to $ff. You can use some adress used telemon, it depends what you have to do, because telemon could use it too