Cray CRAY-1 - Page 116

Special cases
(A i) = highest pri ori ty channel caus; ng ; nterrupt ; f (,L\,j) = 0
(Ai) = current address of channel (Aj) if (Aj) ~ 0 and k = 0,2,4,6
(Ai) = I/O error flag of channel (Aj) if (Aj) ~ 0 and k = 1,3~5,7
(Ai) = ° if (Aj) = 1
2240004
2 CPs must elapse after an 0012xx instruction issue before issuing
an 033iOO instruction.
4-30 E