 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS:  B06056     ]
 ] M.C. JOHNSON       ]    BFS PROGRAM NOTE         ]                  ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:            ]
 ] RI/OS/KSC    3393  ]      RELEASE NOTE ( )       ] 02-26-82         ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]    11.31 AND SUBS             ]  CREW ( )  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED:     ]
 ]BSL( ) BSS(X) GNC(X) SEQ( ) SM/SP( ) IPL( )] 6                       ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  DEDICATED DISPLAYS, ABORT, DOWNLIST, GPC        ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: MG038101/3.1.7                                 ]
 ]_____________________________________________________________________]
 ] TITLE:  EXPONENT OVERFLOW AT TRANSITION TO MM601                    ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] A ONE-TIME GPC ERROR WILL BE LOGGED IF THE FOLLOWING                ]
 ] CONDITIONS ARE OBTAINED:                                            ]
 ]      1)  AN RTLS ABORT IS DECLARED VIA ROTARY ABORT                 ]
 ] SWITCH (PANEL F6).                                                  ]
 ]      2)  BEC DETECTS THIS RTLS ABORT REQUEST WHILE                  ]
 ] EXECUTING IN MINOR CYCLE 8.                                         ]
 ] UNDER THESE CONDITIONS, THE D@DDU MODULE WILL TRY TO                ]
 ] CONVERT UNINITIALIZED DATA (HEADING_RW=C6C6) CAUSING AN             ]
 ] EXPONENT OVERFLOW CONVERT.  IN THE NEXT MAJOR CYCLE                 ]
 ] PW_HSI_COMPS WILL COMPUTE HEADING_RW PRIOR TO ITS USE BY            ]
 ] D@DDU AND NO FURTHER GPC ERRORS OCCUR.  THE ONE GPC ERROR           ]
 ] HAS NO IMPACT ON FLIGHT SINCE THE HEADING_RW IS USED TO             ]
 ] DRIVE THE HSI FOR VISUAL DISPLAY AND IS MISSED FOR ONE              ]
 ] MAJOR CYCLE ONLY.                                                   ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ] THE GPC ERROR IS TRANSPARENT TO THE CREW AND DOES NOT               ]
 ] AFFECT FLIGHT.  GPC ERRORS ARE SEEN IN THE DOWNLIST ONLY.           ]
 ] IGNORE THIS ERROR.                                                  ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]RI:<S>R. VAN DYK          DATE 03/01/82]                             ]
 ] --------------------         ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 9/22/88 ]                             ]
 ] --------------------         ---------] JACK G BOYKIN       9/22/88 ]
 ]PF MGR:MICHAEL BRIEDEN    DATE 9/21/88 ]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
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