Hi Melanie!

Ya I understand about interupts, that is not really my question,
let's suppose we have a program which executes 4 strings to an lcd, each associated to a button or switch, just for clarity I will give them the following labels, FIRE:
CLOSING TIME:
RESTROOMS CLOSED:
LAST CALL:
This might be a sign in a Pub or Bar.

The obvious first priority would be , FIRE, likely followed by Restrooms Closed . . etc . . .

What I need is for FIRE to cancel and interrupt all lower displays, and Restroom Closed to Interrupt Last call without being able to interrupt FIRE and so on. . . Is this something a PIC can do?
Thank You,
Joe Stokes