1+_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] PAUL TICE          ]    PASS PROGRAM NOTE        ]      37507       ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: AUG. 1987  ]
 ] LORAL/282-7297     ]      RELEASE NOTE( )        ] REV A: 02/02/94  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] REL 18 AND SUBS               ]  CREW (X)  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW (X)  GNC ( )  VU ( )  SM/PL ( )] 0, G1, G2, G3, G6, G8, G9, S2,  ]
 ]                                   ] S4, PL9                         ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: I/O, DEU, ANNUNCIATION                           ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: SANU                                           ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ] NO PRE-ENABLE OF DEU I/O ERROR ANNUNCIATION FOR HARD DEU I/O        ]
 ] FAILURES (INCLUDING DEU POWER OFF)                                  ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] THE USER IS NOT ABLE TO PRODUCE FURTHER CONFIRMATION OF A HARD FAIL ]
 ] I/O ERROR FAILURE TO A DEU BY THE ANNUNCIATION ON THE MESSAGE LINE. ]
 ] ONE MESSAGE WILL BE PRODUCED AT THE FIRST RECOGNITION OF THE FAULT, ]
 ] AND FURTHER ANNUNCIATION IS LOCKED OUT UNTIL A GOOD DEU RESPONSE IS ]
 ] RECEIVED. THE USE OF I/O RESET OR GPC/CRT KEY ENTRIES ONLY RESETS   ]
 ] THE I/O ERROR HANDLING AT THE FCOS LEVEL. FROM THE DOWNLIST, NEW    ]
 ] I/O ERROR LOG ENTRIES WILL BE OBSERVED. THE CRITERIA TO REMOVE THE  ]
 ] ANNUNCIATION INTERLOCK IS A GOOD POLL RESPONSE HANDLED AT THE USER  ]
 ] INTERFACE LEVEL. SINCE, FOR HARD I/O ERROR CONDITIONS, USER         ]
 ] INTERFACE SOFTWARE HAS NO KNOWLEDGE TO RE-ENABLE THE ANNUNCIATION,  ]
 ] NO FURTHER ANNUNCIATION IS GENERATED. ANOTHER ASPECT OF THIS        ]
 ] SITUATION IS THAT NEW GPC'S ADDED TO AN RS WILL ANNUNCIATE THE I/O  ]
 ] ERROR, WHILE OLD RS MEMBERS DO NOT.                                 ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ]                                                                     ]
 ] RECOGNIZE THE ABOVE SITUATION OCCURS FOR POWERED OFF DEUS.          ]
 ]                                                                     ]
 ] FOR TROUBLESHOOTING OTHER DEU HARD-FAIL I/O CONDITIONS, IT WILL BE  ]
 ] NECESSARY TO COORDINATE WITH THE GROUND TO INSURE THE SOFTWARE      ]
 ] IS RESPONDING PROPERLY.                                             ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]LORAL:   JEAN L. ZOPHY    DATE 03/08/94]                             ]
 ]      ------------------      ---------]                             ]
 ]FDSD:   W. R. PRUETT      DATE 03/10/94]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 03/14/94 ]
 ]PF MGR: ERIC C. BINGHAM   DATE 03/10/94]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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