 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ]  HIRAM THOMPSON    ]    PASS PROGRAM NOTE        ]       100755 *   ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:  05/12/87  ]
 ]  LSIS/282-7225     ]      RELEASE NOTE( )        ] REV D: 03/13/95  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]  OI-07 AND SUBS               ]  CREW (X)  GROUND ( )  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW (X)  GNC ( )  VU ( )  SM/PL ( )] 0, G1, G2, G3, G6, G8, G9, S2,  ]
 ]                                   ] S4, P9                          ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: DISP, SPEC, DEU, I/O                             ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: SDEU                                           ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ]     DISPLAY ANOMALIES DUE TO SPEC REQUEST DURING DISPLAY CHANGE     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:  * REF DR 104021                                       ]
 ]                                                                     ]
 ] THE FOLLOWING DISPLAY ANOMALIES CAN RESULT IF THE SPEC KEY IS       ]
 ] ENTERED DURING DISPLAY FILLS FOR A NEW DISPLAY.                     ]
 ]                                                                     ]
 ] 1. COMPLETE (NON MOMENTARY) BLANKING OF CRT                         ]
 ] 2. CYCLICLY UPDATED PARTS OF NEW DISPLAY ON TOP OF REMNANTS OF      ]
 ]    PREVIOUS DISPLAY (E.G. MIXED DISPLAY OF G2 OPS PAGE AND FAULT    ]
 ]    SUMM).  IN ADDITION, THE DISPLAY DATA MAY BE SKEWED FROM ITS     ]
 ]    NORMAL POSITIONING.                                              ]
 ]                                                                     ]
 ] THIS ANOMALY CAN OCCUR ANYTIME A NEW DISPLAY IS GENERATED (VIA      ]
 ] KEYSTROKE, DURING AUTOMATIC MODE TRANSITIONS, E.G. MM304 TO MM305   ]
 ] TRANSITION), OR CERTAIN SWITCH ACTIONS CAUSING A NEW DISPLAY (E.G.  ]
 ] MAJOR FUNCTION SWITCH, BFC/CRT SELECT, ETC.).                       ]
 ]                                                                     ]
 ] THE FOLLOWING KEYBOARD ENTRIES WILL CAUSE NEW DISPLAY FILLS:        ]
 ]                                                                     ]
 ] - RESUME (ONLY WHEN THE BASE MODE PAGE NOT CURRENTLY DISPLAYED)     ]
 ] - SPEC XXX PRO                                                      ]
 ] - SPEC + (ANY KEY), I.E. UNFREEZING A DISPLAY                       ]
 ] - FAULT SUMM                                                        ]
 ] - SYS SUMM (EXCEPT OPS 0 & G9)                                      ]
 ] - ANY VALID ENTRY WITH THE EXEC OR PRO TERMINATOR KEY               ]
 ]                                                                     ]
 ]                CONTINUED ON SUPPLEMENT PAGE                         ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]LSIS:   JEAN L. ZOPHY     DATE 04/18/95]                             ]
 ]     -------------------      ---------]                             ]
 ]ASD:   ERIC C. BINGHAM    DATE 04/25/95]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 05/01/95 ]
 ]PF MGR: KAYLENE F. KINDT  DATE 04/25/95]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
 @





 +_____________________________________________________________________
 ]                                                                     ]
 ]                       SUPPLEMENTAL SHEET                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] DR:              ]
 ]  HIRAM THOMPSON    ]    PASS PROGRAM NOTE        ]       100755     ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:  05/12/87  ]
 ]  LSIS/282-7225     ]      RELEASE NOTE( )        ] REV D: 03/13/95  ]
 ]____________________]_____________________________]__________________]
 ] TITLE:                                                              ]
 ]    DISPLAY ANOMALIES DUE TO SPEC REQUEST DURING DISPLAY CHANGE      ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] A SINGLE SPEC KEY INDICATES TO THE DCP TO FREEZE THE DISPLAY.       ]
 ] WHILE IN THIS STATE, THE DCP PROGRAM, WHICH RUNS IN THE DEU, WILL   ]
 ] REJECT ANY DISPLAY FILLS WHICH ARE WRITTEN WHILE THE DISPLAY IS     ]
 ] FROZEN.  AS A RESULT, ONE OR MORE OF THE DISPLAY FILLS WHICH ARE    ]
 ] SENT TO THE DEU DURING THE GENERATION OF A NEW DISPLAY MAY BE       ]
 ] DISCARDED BY THE DCP.                                               ]
 ]                                                                     ]
 ] IF A SPEC KEY IS RAPIDLY FOLLOWED BY ANOTHER KEY (NUMERIC) DURING   ]
 ] THE GENERATION OF A NEW DISPLAY, IT IS POSSIBLE FOR THE DCP TO      ]
 ] FREEZE AND UNFREEZE WITHOUT THE GPC DETECTING THE FREEZE CONDITION  ]
 ] (I.E., BOTH SPEC AND NUMERIC OCCUR IN BETWEEN SUBSEQUENT DEU POLLS  ]
 ] BY THE GPC).  IF THE BACKGROUND FOR THE NEW DISPLAY WAS SENT WHILE  ]
 ] THE DCP WAS IN FREEZE, THUS BEING REJECTED BY THE DCP, THEN THE     ]
 ] RESULTING DISPLAY WILL HAVE THE PREVIOUS DISPLAY'S BACKGROUND WITH  ]
 ] THE NEW DISPLAY'S FOREGROUND.                                       ]
 ]                                                                     ]
 ] THE EXACT MANIFESTATION IS DEPENDENT ON THE TIMING OF THE SPEC KEY  ]
 ] WITH RESPECT TO THE MULTIPLE FILLS ASSOCIATED WITH A NEW DISPLAY    ]
 ] (SINCE SOME FILLS ARE ONE TIME ONLY WHILE OTHERS ARE CYCLIC).       ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ] IF POSSIBLE, THE USER SHOULD AVOID ENTERING A SPEC KEY IMMEDIATELY  ]
 ] FOLLOWING NEW DISPLAY REQUESTS (EITHER VIA KEYBOARD OR AUTOMATIC).  ]
 ] THE USER SHOULD DELAY ENTERING A SPEC KEY UNTIL THE NEWLY REQUESTED ]
 ] DISPLAY IS COMPLETE.                                                ]
 ]                                                                     ]
 ] IN THE CASE OF ENTRIES SUCH AS "ITEM XX EXEC" WHERE THE CHANGE IN   ]
 ] DISPLAY IS NOT SIGNIFICANT OR READILY APPARENT, THE USER SHOULD     ]
 ] DELAY A MINIMUM OF 1 SECOND BEFORE ENTERING SPEC ON THE KEYBOARD.   ]
 ]                                                                     ]
 ] THE DISPLAY ANOMALY CAN BE CLEARED BY REQUESTING A NEW DISPLAY, E.G.]
 ] COMPLETING THE SPEC XXX PRO WHICH WAS INITIATED BY THE INITIAL SPEC ]
 ] WHICH CAUSED THE DISPLAY ANOMALY OR BY REQUESTING A DIFFERENT DIS-  ]
 ] PLAY. NOTE: THE RESUME KEY CAN ONLY BE USED TO CLEAR THIS ANOMALY   ]
 ] IF A MODE DISPLAY IS NOT CURRENTLY ACTIVE.                          ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
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