 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ]  S. ADAMS          ]    PASS PROGRAM NOTE        ]      54091       ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:  07/03/86  ]
 ]  IBM/282-7364      ]      RELEASE NOTE( )        ] REV A: 08/03/90  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]   OI7 AND SUBS                ]  CREW ( )  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW (X)  GNC ( )  VU (X)  SM/PL ( )] 0, G1, G2, G3, G6, G8, G9, S2,  ]
 ]                                   ] S4, PL9                         ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: CYCLE-WRAP, TCS, GPC, LDB, SACS, I/O             ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: SLDB                                           ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ] DGI CYCLE WRAP AFTER GSE POLLING COMMANDER CHANGE                   ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] WHEN TCS OR SACS OPERATOR 7 IS USED TO CHANGE THE COMMANDER FOR GSE ]
 ] POLLING, ALL I/O ON THE BUS IS DELAYED FOR 80 MILLISECONDS TO INSURE]
 ] THAT BOTH GPCS INVOLVED HAVE TIME TO HONOR THE COMMANDER CHANGE RE- ]
 ] QUEST.                                                              ]
 ] THE MANIFESTATIONS OF THIS REQUEST MAY VARY DEPENDENT ON THE FOLLOW-]
 ] ING VARIABLES:                                                      ]
 ]   - TCS OR SACS REQUEST                                             ]
 ]   - CS OR RS BUS COMMANDER CHANGE                                   ]
 ]   - OPS                                                             ]
 ] ONE OR MORE OF THE FOLLOWING MANIFESTATIONS WILL OCCUR:             ]
 ]   1) POLLING WILL BE SUSPENDED/LOST FOR 2 OR 3 POLLING CYCLES       ]
 ]   2) POSSIBLE DGI CYCLE WRAP (GP 2 CODE OD) GPC ERROR               ]
 ]   3) POSSIBLE I/O ERROR ON THE POLLING LDB, INIT T/O ON THE STATUS  ]
 ]      REQUEST PROTOCOL                                               ]
 ]   4) TCS/SACS OP CODE 7 RESPONSE MAY NOT BE TRANSMITTED TO GROUND   ]
 ]      (LPS/ACE).                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ]BE AWARE OF THE ABOVE CONDITIONS OR MANIFESTATIONS WHEN THIS FUNCTION]
 ]IS PERFORMED.                                                        ]
 ]                                                                     ]
 ]NOTE:  LDB POLLING IS TERMINATED AT SRB IGNITION, BUT MAY BE ACTIVE  ]
 ]       IN ALL OPS IN LAB OPERATIONS OR SPECIAL ORBITER TEST CONFIGU- ]
 ]       RATIONS.                                                      ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: PATTI A. THORNTON    DATE 09/04/90]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD:    SAM ANKNEY       DATE 09/14/90]                             ]
 ]     -------------------      ---------]DARRELL E. STAMPER  09/21/90 ]
 ]PF MGR:ELIZABETH FOUNTAIN DATE 09/17/90]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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