(^) unisgned char => byte (also char=>byte, where wrong)
(-) bug: input call did not accept non-"int" number types (byte,char,etc)
(^) `delay´ => `recursive´
(-) bug: input events were not contiguous
(-) bug: conversion (numeric) => (tceu_evtp)
(*) preparing CEU_IN_OS_INTERRUPT
(-) bug: finalization for global pointer as parameters
(+) ISRs
(+) ceu_init() (inits ISR_VEC)
(^) ISR_ON/OFF => ISR_ON()/OFF()
(^) CEU_APP_ADDR only for __AVR
(^) hold CEU_APP_ADDR only for calls