I read the difference concerning the two macros TOSH_SIGNAL and
TOSH_INTERRUPT. Suppose that two interrupts are driven by the macro
TOSH_SIGNAL. Say


TOSH_SIGNAL( SIG1 )
{
// do something
}

TOSH_SIGNAL( SIG2 )
{
// do something
}

and suppose that sig1 happens. If in the meanwhile sig2 happens it cannot
interrupt sig1 ISR, but I read that some architectures remember that
interrupt and execute it afterwards. Does atmega remember an interrupt if it
happened during the ISR of another one, executing it after the completion of
ISR1?
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