 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] K. BENIKE          ]    PASS PROGRAM NOTE        ]    37514         ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: AUG. 1987  ]
 ] VER/282-8451       ]      RELEASE NOTE( )        ]                  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] REL 18 AND SUBS               ]  CREW ( )  GROUND ( )  DUMP ONLY (X)]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW ( )  GNC (X)  VU ( )  SM/PL ( )] G1                              ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  TRANSITIONS, IPL, ASCENT                        ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: SDPS                                           ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ] GPC-TO-GPC OVERLAY OF MC1 HANGS SYSTEM                              ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] MC 1 (GNC OPS 1) IS NOT REQUIRED TO HAVE OPS MODE RECALL            ]
 ] CAPABILITY. OPS 1 EXECUTION DEPENDS ON INITIALIZATION FROM A MM     ]
 ] OVERLAY. A GPC THAT HAS BEEN LOADED WITH MC1 AND DOWN-MODED (VIA    ]
 ] MODE SWITCH TRANSITIONS) OR DROPPED TO OPS 000 AS A RESPONSE TO     ]
 ] NOT BEING TARGETED FOR AN OPS 1 TO OPS X TRANSITION WILL HAVE AN    ]
 ] MC1 OVERLAY THAT CAN BE THE SOURCE FOR A GPC-TO-GPC OVERLAY. IF     ]
 ] A USER PROCEDURALLY CAUSES THE SITUATION WHERE MC1 GETS LOADED      ]
 ] VIA GPC-TO-GPC, THE SYSTEM WILL HANG WHEN THE OPS EXECUTION         ]
 ] IS INITIATED. FOR FLIGHT SITUATION, THIS TYPE OF OPERATION IS       ]
 ] NOT A PRACTICAL PROBLEM.                                            ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ]                                                                     ]
 ] ALWAYS RE-IPL A GPC THAT HAS BEEN DOWN-MODED FROM MC1, IF FUTURE    ]
 ] OPS TRANSITIONS GO TO GNC OPS 1. IF THE USER GETS INTO THIS         ]
 ] SITUATION, THE PASS WILL REQUIRE IPL.                               ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: WYATT COOPER         DATE 9/20/88 ]                             ]
 ]    --------------------      ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 9/20/88 ]                             ]
 ]    --------------------      ---------] JACK G BOYKIN       9/22/88 ]
 ]PF MGR:MICHAEL BRIEDEN    DATE 9/19/88 ]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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