1+_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] PAUL M. TICE       ]    PASS PROGRAM NOTE        ]     106934       ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:            ]
 ] IBM/282-7297       ]      RELEASE NOTE( )        ]     04/06/93     ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] OI-21 AND SUBS                ]  CREW (X)  GROUND ( )  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW (X)  GNC ( )  VU ( )  SM/PL ( )]  ALL                            ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: DEU                                              ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: SDEU                                           ]
 ]_____________________________________________________________________]
 ] TITLE: RAPID SHIFTING/JUMPING OF FOREGROUND DEU DISPLAY FIELDS      ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] IT IS POSSIBLE TO SEE VERY RAPID ONE-TIME SHIFTS OR JUMPS OF SOME   ]
 ] FOREGROUND FIELDS BEING DISPLAYED BY THE DEU ON A CRT.  THIS IS A   ]
 ] BENIGN PHENOMENON DUE TO VARYING LENGTH FOREGROUND UPDATES BEING    ]
 ] PLACED IN DEU MEMORY WHILE THE DEU SYMBOL GENERATOR IS ACCESSING    ]
 ] THE SAME AREA OF DEU MEMORY TO REFRESH THE DYNAMIC PART OF THE      ]
 ] DISPLAY.  THE FOREGROUND DISTORTION LASTS FOR 18.2 MILLISECONDS,    ]
 ] ONE SYMBOL GENERATOR CYCLE, AND IMMEDIATELY CLEARS UP.              ]
 ]                                                                     ]
 ] KNOWN CASES WHERE PASS SENDS VARYING LENGTH FOREGROUND UPDATES ARE: ]
 ] 1) DISPLAY PARAMETERS WHICH HAVE GONE IN OR OUT OF LIMITS, OR DATA  ]
 ]    WHICH IS MISSING OR IN-LIMITS - ON THIS DISPLAY UPDATE           ]
 ] 2) TEXT FIELDS WITH THE OPPOSITE INTENSITY (OVERBRIGHT/NORMAL)      ]
 ]    SPECIFIED - ON THIS DISPLAY UPDATE                               ]
 ] THE POSSIBILITY OF OCCURRENCE INCREASES IF, FOR EXAMPLE, SEVERAL    ]
 ] PARAMETERS GO OUT OF LIMITS AT THE SAME TIME OR ONE PARAMETER IS    ]
 ] TOGGLING IN AND OUT OF LIMITS REGULARLY.  A COMBINATION OF THE      ]
 ] AFOREMENTIONED EXAMPLES WILL ALSO INCREASE THE LIKELIHOOD OF        ]
 ] OCCURRENCE ACCORDINGLY.                                             ]
 ]                                                                     ]
 ] (ALSO REFERENCE DR14474)                                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ]                                                                     ]
 ] BE AWARE THAT THIS PHENOMENON EXISTS.                               ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM:   JEAN L. ZOPHY      DATE 04/27/93]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD:   W. R. PRUETT      DATE 04/29/93]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 04/30/93 ]
 ]PF MGR:  ERIC C. BINGHAM  DATE 04/28/93]------------------- -------- ]
 ]       ------------------     ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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