OPERATION 000 Rotate AEOI 001 EOI 010 NOP 011 EOI (L) 100 Rotate AEOI setMode 101 SetPriority Instruction 110 Rotate EOI 111 Rotate EOI (L)
OP1 00 NOP 01 NOP 10 Cancel Mask 11 Set Mask OP2 00 NOP 01 NOP 10 Read IRR 11 Read ISR