 +_____________________________________________________________________
  AUTHOR:                                          SMS: B28002      
  T. MCCLAIN             BFS PROGRAM NOTE          DR:  106037      
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  ORG/PHONE:          OPS NOTE (X)  USER NOTE ( )  DATE: 08/24/90   
  BRSS/(714)372-9919       RELEASE NOTE ( )        REV A:03/20/00   
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  OI/FLIGHT EFFECTIVITY:          USER AFFECTED:                     
       OI-20 AND SUBS             CREW ( )  GROUND (X)  DUMP ONLY ( )
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            MAJOR SOFTWARE AREA:             OPS MODES AFFECTED:     
 BSL( ) BSS(X) GNC( ) SEQ( ) SM/SP( ) IPL( )     0,1,3,6             
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  SOFTWARE SUB-AREA: MCDS INTERFACE                                   
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  PRINCIPAL FUNCTIONS: ICD-3-1011-02/3.6.6;  MG038101/3.3.7           
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  TITLE: DEU IPL CAUSES INVALID MESSAGE RECEIVED ERROR                
                                                                      
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  DESCRIPTION: REQUESTING A DEU IPL/VM LOAD ON A BFS COMMANDED DEU/IDP
  WILL CAUSE THE DEU CONTROL PROGRAM (DCP) TO BE SENT FROM GPC MEMORY 
  TO THE DEU/IDP.  UPON COMPLETION OF THE LOAD, THE DEU/IDP WILL BEGIN
  CYCLIC OPERATION AND PERFORM AS EXPECTED. THIS LOAD, HOWEVER, WILL  
  RESULT IN CPU BITE SOFTWARE FAIL BIT (BIT 7 OF HARDWARE STATUS WORD 
  2) AND THE FOLLOWING BITS OF THE SOFTWARE STATUS WORD BEING SET FOR 
  THE DEU IPL:  BIT 0: DISPLAY/FORMAT FILL ERROR                      
                BIT 2: INITIALIZATION PERFORMED (EXPECTED)            
                BIT 3: INVALID FILL/DUMP WORD COUNT                   
                BIT 9: INVALID MESSAGE RECEIVED                       
                                                                      
  FOR AN IDP VM LOAD, THE FIRST IDP STATUS REPSONSE RECEIVED FOLLOWING
  THE VM LOAD WILL HAVE THE DISPLAY/FORMAT FILL ERROR (BIT 0 OF MEDS  
  STATUS WORD 3) SET.  IN ADDITION, ERROR ID STATUS CHANGES CONTAINING
  ONE OR MORE OF EACH OF THE FOLLOWING ERROR IDS WILL BE GENERATED:   
                16#31#: INVALID MESSAGE RECEIVED                      
                16#33#: INVALID START ADDRESS                         
                16#34#:  INVALID WORD COUNT                           
  THESE BITS AND ERROR ID STATUS CHANGES WILL BE VISIBLE IN THE       
  DEU/IDP DOWNLIST DATA.                                              
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  USER RESPONSE:                                                      
                                                                      
  NO USER RESPONSE IS REQUIRED SINCE THE DCP WILL BE SUCCESSFULLY     
  SENT AND THE DEU/IDP WILL FUNCTION PROPERLY.                        
                                                                      
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 CONCURRENCE:                           APPROVAL:                    
 BRSS/BFS: <S> D. CORBIN   DATE 03/21/00                             
          ---------------      ---------                             
 CHAIR:   KENNETH HILL     DATE 03/28/00                             
       ------------------      --------- DARRELL E. STAMPER 03/29/00 
 PF MGR:   DAVID WOOD      DATE 03/28/00------------------- -------- 
        -----------------      --------- CHAIRMAN, SASCB      DATE   
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