Hello,
this is maybe question for someone who knows how PBP is working, but do think, that is could be possible to update the code via e.g. serial port? But I don't want to use the bootloader, I want to update only the specific part of the code memory. E.g.

'Existing code
:rx
HSERIN data
gosub manageData
goto rx
end

:manageData
'do something
RETURN

I want to replace only the function manageData. The manage data function will not be used during the update of the code. Do you think, that this would be possible? Does anyone have idea how to do it? ( E.g. how to know, at which address the manageData starts? )