_ DEC-O-LOG for 10XXX 10XXX-O001, Memory config restrictions MAY 94 APPLICABILITY: This "O" coded FCO should be installed on all DEC 7XXX and DEC 10000-6XX systems, replacing all E2040-AA(all revs),E2040-AB (all revs) and E2040-YA (rev. A01, B01, C01, and D01) CPU modules with new E2040-YA rev. E01 CPU module. These FCOs incorporate the following ECOs: (1) E2040-AB-TWO001 and (2) E2040-YA-TWO003. This FCO will also upgrade all 182 MHZ systems to 200 MHZ performance. PROBLEM & SYMPTOM: (1) System currently has certain memory configuration restrictions that are checked by console prior to booting the system. The console will display the following message "INVALID MEMORY INTERLEAVING- boot disallowed", when a boot is attempted on the system. (2) The Cache error correction routine does not properly correct cache signal bit errors. This problem has the potential to severly disrupt normal system operation. SOLUTION: Replace the E2040-AA(all revs); E2040-AB(all revs) and E2040-YA(rev. A01, B01,C01,D01) CPU modules as per a procedure (see below) with new E2040-YA rev. E01 module, minimum revision must be E01. NOTE: All modules at rev. E01 need a minimum Console version V2.5 QUICK CHECK: Verify that all System modules are E2040-YA at the minimum Rev E01 and the Spares kits are at rev E01. FCO KIT ORDERING: EQ-01694-01 1 E2040-YA CPU module at revision E01 or higher FA-05031-01 1 Field Application (FA) Document