Interrupts, Disable 1: enable, No interrupt requested 1: interrupt requested – Lucent Technologies MN10285K User Manual
Page 53: Interrupt undetected 1: interrupt detected, Sets the priority from 0 to 6, Iq3ie: external interrupt 3 interrupt enable flag, Iq4ir: external interrupt 4 interrupt request flag, Iq4id: external interrupt 4 interrupt detect flag, Iq4ie: external interrupt 4 interrupt enable flag
