 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] K. BENIKE          ]    PASS PROGRAM NOTE        ]    37509         ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:            ]
 ] VER/282-8451       ]      RELEASE NOTE( )        ] AUG. 1987        ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] REL 18 AND SUBS               ]  CREW ( )  GROUND (X)  DUMP ONLY (X)]
 ]_______________________________]_____________________________________]
 ]        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: DOWNLIST, I/O                                    ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: SBIO                                           ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ] DOWNLIST I/O ERROR LOG OVERRUN CONDITIONS                           ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] DOWNLIST I/O ERROR LOG OVERRUNS MAY BE OBSERVED UNDER THE FOLLOWING ]
 ] HARD FAIL I/O CONDITIONS:                                           ]
 ]                                                                     ]
 ] A. DURING AN OPS TRANSITION WITH ANY OF THESE FAULTS:               ]
 ]    FF1-3 MDM, MTU1-3, OR ACTIVE NSP FAULTED. THE MTU AND NSP        ]
 ]    TRANSACTIONS EXECUTE ACROSS THE TRANSITION. SINCE BCE ELEMENT    ]
 ]    BYPASS IS NOT ALLOWED TO OCCUR DURING OPS TRANSITIONS, I/O ERROR ]
 ]    LOG ENTRIES WILL BE OBSERVED AT THE RATE OF THE I/O CONTAINING   ]
 ]    THE FAULT OR COMBINATION OF FAULTS.                              ]
 ]                                                                     ]
 ] B. I/O RESET KEY WITH ANY FAULT OF NON-BYPASSABLE DEVICES (EXAMPLE  ]
 ]    DEU'S). THE I/O RESET FUNCTION RE-ENABLES ADDITIONAL LOG ENTRIES ]
 ]    OF NON-BYPASSABLE DEVICES. THE TRANSACTION COUNTERS WHICH ARE    ]
 ]    USED IN LIMITING THE NUMBER OF ENTRIES TO LOG ARE RESET TO ZERO  ]
 ]    ON EACH OF THE 1 SECOND PASSES OF A STRING OR BUS RESET.         ]
 ]    (MINIMUM 8 SECONDS)                                              ]
 ]                                                                     ]
 ] C. I/O RESET KEY WITH MTU FAULTED. THE TIME INTERVAL BETWEEN STRING ]
 ]    OR BUS RESETS IS APPROXIMATELY 1 SECOND. THIS DOES NOT ALLOW A   ]
 ]    FAULTED MTU TO BE BYPASSED BEFORE THE NEXT RESET INITIATION.     ]
 ]    (MINIMUM 8 SECONDS)                                              ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ] NONE.                                                               ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: WYATT COOPER         DATE 8/4/88  ]                             ]
 ]    --------------------      ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 8/10/88 ]                             ]
 ]    --------------------      ---------] JACK BOYKIN         8/17/88 ]
 ]PF MGR: MICHAEL BRIEDEN   DATE 8/8/88  ]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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