1+_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] PAUL TICE          ]    PASS PROGRAM NOTE        ]     15620   *    ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: JULY 1987  ]
 ] IBM/282-7297       ]      RELEASE NOTE( )        ] REV C: 01/03/91  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] OI8D 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: MMU, OPS, TRANSITIONS                            ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: SBIO                                           ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ] MMU AND OTHER CONTENTIONS WITH OPS TRANSITION                       ]
 ]_____________________________________________________________________]
 ] DESCRIPTION: * 28353, 36094, 36549, 37657, 37660, 39021, 40622,     ]
 ]                51349, 51373 (ALSO REF 55300 AND 100788, AND 52779)  ]
 ] TO ASSURE SUCCESSFUL OPS TRANSITIONS AND CREW SAFETY, MMU CON-      ]
 ] TENTIONS ARE TO BE PROCEDURALLY AVOIDED AS SPECIFIED BY CPDS        ]
 ] SS-P-0002-170. ALSO, OTHER FUNCTIONS ACROSS THE CS WHICH COULD      ]
 ] AFFECT THE DATA BASE USED BY THE OPS TRANSITIONS SHOULD BE          ]
 ] PROCEDURALLY AVOIDED. BELOW ARE LISTS OF MMU OPERATIONS AND         ]
 ] OTHER MISCELLANEOUS FUNCTIONS WHICH SHOULD BE AVOIDED THROUGHOUT    ]
 ] THE DURATION OF THE OPS TRANSITION. THESE LISTS ARE NOT ALL         ]
 ] INCLUSIVE. DUE TO OPS TRANSITIONS COMPLEXITY, THERE SHOULD BE NO    ]
 ] SOFTWARE SUPPORTED ACTIONS REQUESTED FROM THE TIME AN OPS TRANSITION]
 ] IS STARTED TO THE TIME IT HAS COMPLETED.                            ]
 ]                                                                     ]
 ] MMU OPERATIONS THAT SHOULD NOT BE EXECUTED CONCURRENT WITH OPS      ]
 ] TRANSITIONS.                                                        ]
 ]                                                                     ]
 ]  + DEU IPL                                                          ]
 ]                                                                     ]
 ]  + GPC IPL (PASS OR BFS)                                            ]
 ]                                                                     ]
 ]  + FREEZE DRY                                                       ]
 ]                                                                     ]
 ]  + OPS TRANSITION IN ANOTHER GPC                                    ]
 ]                                                                     ]
 ]  + DISPLAY FORMAT OVERLAY (SM 2 ONLY)                               ]
 ]                                                                     ]
 ]  + CHECKPOINT                                                       ]
 ]                                                                     ]
 ]  + PULSE-CODE MODULATION MASTER UNIT (PCMMU) FORMAT RETRIEVAL       ]
 ]                                                                     ]
 ]  + TCS TEST SEQUENCES STORED TO/RETRIEVED FROM MMU                  ]
 ]                                                                     ]
 ]  + MM DUMP/PATCH                                                    ]
 ]                                                                     ]
 ]  + INERTIAL MEASUREMENT UNIT (IMU) CALIBRATION REQUESTS             ]
 ]_____________________________________________________________________]




1+_____________________________________________________________________
 ]                                                                     ]
 ]                       SUPPLEMENTAL SHEET                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] DR:              ]
 ] PAUL TICE          ]    PASS PROGRAM NOTE        ]     15620    *   ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: JULY 1987  ]
 ] IBM/282-7297       ]      RELEASE NOTE ( )       ] REV C: 01/03/91  ]
 ]____________________]_____________________________]__________________]
 ] TITLE:                                                              ]
 ] MMU AND OTHER CONTENTIONS WITH OPS TRANSITION                       ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]  + PAYLOAD DATA STORAGE/RETRIEVAL OPERATIONS ON THE MMU             ]
 ]                                                                     ]
 ]  + PAYLOAD DATA INTERLEAVER (PDI) FORMAT RETRIEVAL FROM THE MMU     ]
 ]                                                                     ]
 ] OTHER MISCELLANEOUS FUNCTIONS THAT SHOULD NOT BE EXECUTED CONCURRENT]
 ] WITH AN OPS TRANSITION ARE:                                         ]
 ]                                                                     ]
 ]  + UPLINK COMMANDS                                                  ]
 ]  + IPL SOURCE SWITCH MASK UPDATES VIA DPS UTILITY SPEC (ITEM 38)    ]
 ]  + MMU REASSIGNMENTS VIA DPS UTILITY                                ]
 ]  + ALTERNATE MMU AREA REASSIGNMENTS (ITEMS 52, 53, 54) VIA GPC      ]
 ]     MEMORY SPEC                                                     ]
 ]  + NBAT UPDATES INCLUDING TARGET SET CHANGES TO THE MC TO WHICH A   ]
 ]    TRANSITION IS BEING MADE.                                        ]
 ]  + OPS 3 INITIALIZATION (ITEM 51) VIA GPC MEMORY SPEC               ]
 ]  + GMEM WRITES TO MAIN MEMORY                                       ]
 ]                                                                     ]
 ]    -  VIA GPC MEMORY DISPLAY                                        ]
 ]    -  VIA LDB G-MEM WRITE                                           ]
 ]                                                                     ]
 ]  + TIME MANAGEMENT SPEC FUNCTIONS                                   ]
 ]                                                                     ]
 ]    -  MTU UPDATES SCHEDULED TO TAKE PLACE DURING THE TRANSITION     ]
 ]                                                                     ]
 ]    -  TIMER START/STOP, TIME SOURCE SELECT, OR ACCUMULATOR SELECT   ]
 ]       CONCURRENT WITH OPS REQUESTS                                  ]
 ]                                                                     ]
 ]  + TIME UPDATES SCHEDULED TO TAKE PLACE DURING THE TRANSITION       ]
 ]                                                                     ]
 ]  + I/O RESET'S THAT MAY CONTINUE INTO THE OPS TRANSITION FOR ANY    ]
 ]    GPC. (ALLOW 10 SECONDS FOR AN I/O RESET TO COMPLETE - REFER      ]
 ]    TO DR 31435).                                                    ]
 ]                                                                     ]
 ]  + MEMORY DUMP VIA DOWNLIST OVERLAPPING OPS TRANSITION.             ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]  + GPC/CRT REQUESTS                                                 ]
 ]_____________________________________________________________________]




1+_____________________________________________________________________
 ]                                                                     ]
 ]                       SUPPLEMENTAL SHEET                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] DR:              ]
 ] PAUL TICE          ]    PASS PROGRAM NOTE        ]     15620    *   ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: JULY 1987  ]
 ] IBM/282-7297       ]      RELEASE NOTE ( )       ] REV C: 01/03/91  ]
 ]____________________]_____________________________]__________________]
 ] TITLE:                                                              ]
 ] MMU AND OTHER CONTENTIONS WITH OPS TRANSITION                       ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]  + DEU MAJ FUNC SWITCH CHANGES                                      ]
 ]                                                                     ]
 ]  + BFC CRT SEL SWITCH CHANGES (FORCES MAJ FUNC SWITCH CHANGES)      ]
 ]                                                                     ]
 ]  + BFC CRT DISP SWITCH CHANGES                                      ]
 ]                                                                     ]
 ]  + GPC MODING (ANY GPC) STBY--->RUN, RUN--->STBY OR HALT--->RUN,    ]
 ]    RUN--->HALT.                                                     ]
 ]    HALT--->RUN, RUN--->HALT SHOULD NOT BE DONE IN ANY SITUATION.    ]
 ]                                                                     ]
 ]  + FC/PL PORT MODING                                                ]
 ]                                                                     ]
 ]  + NSP SWITCH CHANGES                                               ]
 ]                                                                     ]
 ]  + LDB EQUIVALENT DEU COMMANDS (EXCEPTIONS IN USER RESPONSE)        ]
 ]                                                                     ]
 ]  + LDB SACS GMEM BLOCK READ (OVERLAPPING OR DURING THE OPS          ]
 ]    TRANSITION)                                                      ]
 ]                                                                     ]
 ]  + BRING UP AN ACTIVE SPEC ON ANOTHER DEU IMMEDIATELY PRIOR         ]
 ]    TO REQUESTING THE OPS TRANSITION                                 ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ] AVOID CONTENTIONS WITH OPS TRANSITIONS.  LDB COMMANDS (SACS)        ]
 ] FOR VEHICLE SAFING MAY BE SENT FIVE SECONDS AFTER D/L FORMAT 20     ]
 ] IS INITIATED (I.E., AT THE START OF THE PSEUDO OPS 000 STATE        ]
 ] WHICH NORMALLY EXISTS DURING TRANSITIONS).                          ]
 ]                                                                     ]
 ] NOTE THAT THE ABOVE LISTS ARE NOT ALL-INCLUSIVE.  THE ONLY APPROACH ]
 ] THAT ASSURES A SUCCESSFUL OPS TRANSITION IS THE NON-ISSUANCE OF     ]
 ] ANY SOFTWARE SUPPORTED ACTIONS DURING THE TRANSITION.  THEREFORE,   ]
 ] COMPLETE ANY SUCH ACTIONS BEFORE THE TRANSITION IS INITIATED OR     ]
 ] AFTER IT HAS COMPLETED.                                             ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: PATTI A. THORNTON    DATE 02/06/91]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD:  W. R. PRUETT       DATE 02/07/91]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 02/12/91 ]
 ]PF MGR:ELIZABETH FOUNTAIN DATE 02/07/91]------------------- -------- ]
 ]       ------------------     ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
 DR15651
