Hi, What's the 'best' way to interface several external irq requests ? PortB change feature seems 'no-go', OR'ing several irq's to the INT pin seems doable ( and then poll which one it was ) but potentially dangerous ( strong possibility of missing one ). Any suggestions ? /Tony Tony KŸbek, Flintab AB ΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣ E-mail: tony.kubek@flintab.com ΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣ