 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] PAUL M. TICE       ]    PASS PROGRAM NOTE        ]     28343 *      ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: JULY 1987  ]
 ] IBM/282-7297       ]      RELEASE NOTE( )        ] REV A: 06/12/91  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] OI-20 AND SUBS                ]  CREW (X)  GROUND ( )  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW (X)  GNC ( )  VU ( )  SM/PL ( )] ALL                             ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: MMU, SPEC, OPS, TRANSITIONS                      ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: SSPC, SDPS                                     ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ] OPS 0/SPEC 0 PAGE PRESENTATION IN FAILURE/NOMINAL OVERLAY CASES     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION: * 25372, 30780, 36183, 37501                           ]
 ] WHILE AN OPS TRANSITION REQUIRING A MEMORY OVERLAY IS TAKING PLACE, ]
 ] THE OPS 0 PAGE IS PRESENTED ON THE CRT. WITH THE OCCURRENCE OF AN   ]
 ] OVERLAY FAILURE AT AN OPS TRANSITION ON ALL TARGET GPCS, THE SPEC 0 ]
 ] PAGE IS PRESENTED ON THE CRT.  THIS IS DONE BECAUSE ON AN OVERLAY   ]
 ] FAILURE, THE OPS/MF DATA CANNOT BE ASSUMED TO BE GOOD.  IF ONE OR   ]
 ] MORE, BUT NOT ALL, GPCS FAIL THE OVERLAY, ANY DEUS RETAINED BY THE  ]
 ] FAILED GPCS WILL PRESENT THE OPS 0 PAGE (NOT THE SPEC 0 PAGE).      ]
 ]                                                                     ]
 ] WHEN AN OPS TRANSITION REQUIRING A RS IS REQUESTED AND ALL ATTEMPTS ]
 ] AT GPC MEMORY OVERLAY FAIL, THE ACTIVE OPS WILL BE EITHER A RS OR   ]
 ] CS OPS 0 (PER PAR. B AND C OF USER NOTE 33268).  FOR OPS TRANSITIONS]
 ] WHERE OPS 0 TO OPS X IS AN ILLEGAL TRANSITION, THE SOFTWARE WILL    ]
 ] REJECT FURTHER OPS X REQUESTS.  ALSO, AN OPS X TO OPS 0 TRANSITION  ]
 ] WILL NOT REDUCE THE RS TO A CS.                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ] FOR OVERLAY FAILURES:                                               ]
 ] A.  THE USER CAN REENTER THE DESIRED OPS TO RETRY THE TRANSITION IF ]
 ]     OPS 0 TO THAT OPS IS LEGAL.                                     ]
 ]                                                                     ]
 ] B.  FOR TRANSITIONS WHERE OPS 0 TO OPS X IS ILLEGAL, THE USER CAN   ]
 ]     REENTER THE PREVIOUS EXECUTING OPS PROVIDING AN OPS 0 TO THIS   ]
 ]     PREVIOUS OPS IS LEGAL.                                          ]
 ]                                                                     ]
 ]                 - CONTINUED ON SUPPLEMENTAL PAGE -                  ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: PATTI A. THORNTON    DATE 07/09/91]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD: W.R. PRUETT         DATE 07/09/91]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 07/10/91 ]
 ]PF MGR:ELIZABETH FOUNTAIN DATE 07/10/91]------------------- -------- ]
 ]       ------------------     ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
 @




 +_____________________________________________________________________
 ]                                                                     ]
 ]                       SUPPLEMENTAL SHEET                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] DR:              ]
 ] PAUL M. TICE       ]    PASS PROGRAM NOTE        ]     28343 *      ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: JULY 1987  ]
 ] IBM/282-7297       ]      RELEASE NOTE ( )       ] REV A: 06/12/91  ]
 ]____________________]_____________________________]__________________]
 ] TITLE:                                                              ]
 ] OPS 0/SPEC 0 PAGE PRESENTATION IN FAILURE/NOMINAL OVERLAY CASES     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ] ANCILLARY OVERLAY PROGRESSION/FAILURE INFORMATION:                  ]
 ] A.  FOR A G3 ARCHIVE RAPID OR "MOVE AND TRANSFER" RETRIEVAL, NO MMU ]
 ]     PREPOSITION IS PERFORMED AND THUS THE OPS 0 PAGE IS NOMINALLY   ]
 ]     DISPLAYED WITHIN A SECOND AFTER THE TRANSITION REQUEST.  THE    ]
 ]     OPS 3 DISPLAY WILL BE PRESENTED AFTER OVERLAY COMPLETION IN     ]
 ]     APPROXIMATELY 4 SECONDS FOR A RAPID RETRIEVAL OR IN APPROXI-    ]
 ]     MATELY 17 SECONDS FOR A "MOVE AND TRANSFER" RETRIEVAL.          ]
 ]                                                                     ]
 ] B.  FOR A "NON-ARCHIVE" TAL TRANSITION (G1 TO G3) FROM MMU, IF THE  ]
 ]     OPS 0 PAGE IS NOT DISPLAYED WITHIN 10 TO 12 SECONDS THEN PRE-   ]
 ]     POSITION FAILURES ON BOTH MMUS CAN BE ASSUMED.  FOR OTHER       ]
 ]     TRANSITIONS, IT WILL TAKE ABOUT 70 SECONDS BEFORE MASS MEMORY   ]
 ]     PRE-POSITION FAILURES CAN BE ASSUMED.  THE FAULT SUMMARY PAGE   ]
 ]     AND I/O ERROR LOG(S) SHOULD BE ANALYZED TO AID IN DISCERNING    ]
 ]     THIS TYPE OF FAILURE.                                           ]
 ]_____________________________________________________________________]
 @
