*COMDECK IMSCET 
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*1DC  CET - COUPLER EQUIPMENT TABLE 
* 
*     CET IS USED BY NIP TO DETERMINE IF PIP SHOULD SCAN EST ENTRIES
*     AND USED BY PIP TO INFORM NIP THAT A NP/NQ EST ENTRY HAS BEEN 
*     TURNED ON.  PIP WILL ONLY SCAN THE EST ENTRIES IF THERE IS A
*     OFF NP/NQ ENTRY IN THE TABLE AND LESS THAN 8 ON NP/NQ ENTRIES 
*     IN THE TABLE.  ALL THE ENTRIES ARE SET OFF INITIALLY. 
*     IF PIP FINDS A NEW ON NP/NQ EST ENTRY, IT SETS THE CHANGE FLAG
*     FOR THAT ENTRY AND THE CHANGE FLAG IN CET HEADER. THE TABLE WILL
*     CONTAIN ALL THE NP/NQ ENTRIES THAT ARE IN THE EST.  IF NO PIP 
*     IS RUNNING, NIP WILL PERIODICALLY CALL PIP (ONCE EVERY 10 SECONDS)
*     TO DO THE EST SCAN.  THE TABLE IS DYNAMICALLY ALLOCATED AND 
*     CANNOT BE MOVED BY GARBAGE COLLECTION.
* 
*     CET CONSISTS OF A TWO-WORD HEADER AND UP TO A MAXIMUM OF 63 
*     ONE-WORD ENTRIES, EACH ENTRY CORRESPONDS TO AN NP/NQ ENTRY FOUND
*     IN THE EST. IT HAS THE FOLLOWING FORMATS: 
* 
*     CET HEADER FORMAT 
* 
*                    2       3       3                    5 5 5 
*      0    6        4       0       6                    7 8 9 
*     I----I--------I-------I-------I--------------------------I
*     I    I        I       I       I                          I
*     I ID I   BS   I  NON  I  NOFF I                          I
*     I----I--------I-------I-------I--------------------I-I-I-I
*     I                                                  IBICICI
*     I              R E S E R V E D                     IZI1I I
*     I--------------------------------------------------I-I-I-I
* 
*     WHERE.... 
* 
*       ID    = CET TABLE IDENTIFIER 53B. 
*       BS    = CET TABLE SIZE. 
*       NON   = NUMBER OF ON NP/NQ ENTRIES IN CET.
*       NOFF  = NUMBER OF OFF NP/NQ ENTRIES IN CET. 
*       BZ    = BUSY FLAG. SET BY PIP WHEN IT INITIATES EST SCAN TO 
*               INTERLOCK OTHER PIP(S) FROM SCANNING THE EST AT THE 
*               SAME TIME. CLEARED BY PIP WHEN IT COMPLETES THE EST 
*               SCAN FUNCTION.
*       C1    = CET CHANGED FLAG. SET BY PIP IF C2 IS SET IN ONE OR 
*               MORE CET ENTRIES. CLEARED BY NIP WHEN ALL THE NEW ON
*               CET ENTRIES ARE PROCESSED.
*       C     = COMPLETION FLAG. SET BY PIP WHEN THE EST SCAN IS
*               COMPLETED. CLEARED BY NIP WHEN THE EST SCAN IS TO BE
*               PERFORMED BY PIP (EVERY 10 SECONDS).
* 
*     CET ENTRY FORMAT
* 
*                  1     1 2    2    2 2     3      4 4    5  5   5 
*       0     3    2     8 0    4    7 8     6      8 9    7  8   9 
*     --------------------------------------------------------------- 
*     I   I  I     I    I I    I    I I     I      I I    I I   I   I 
*     I F I  I     I    I I    I    I I     I      I I    I I S I C I 
*     I L I  I EST I CH I IPIP I EQ I I  HN IOI ET I I TN I I A I 2 I 
*     I G I  I     I    I I    I    I I     IFI    I I    I I M I   I 
*     I   I  I     I    I I    I    I I     IFI    I I    I I   I   I 
*     --------------------------------------------------------------- 
* 
*     WHERE...... 
* 
*       FLG   = SET IF COUPLER IS INITIALLY ON IN THE EST.
*       EST   = EST ORDINAL OF THE NP/NQ ENTRY. 
*       CH    = CHANNEL NUMBER OF COUPLER.
*       PIP   = PIP NUMBER IDENTIFYING THE PIP THAT DRIVES THIS COUPLER.
*       EQ    = EQUIPMENT NUMBER OF COUPLER.
*       HN    = NODE NUMBER ASSIGNED TO THE COULER IN THE NETWORK 
*               CONFIGURATION FILE. 
*       OFF   = OFF COUPLER FLAG. SET BY NIP WHEN IT RECEIVES AN
*               EST/OFF SUPERVISORY MESSAGE FOR THE COUPLER FROM PIP. 
*               CLEARED BY NIP WHEN IT IS INFORMED BY PIP THE COUPLER 
*               ENTRY IS TURNED ON IN THE EST.
*       ET    = EQUIPMENT MNEMONIC, NP OR NQ. 
*       TN    = NODE NUMBER ASSIGNED TO THE CDCNET FRONT END. 
*       SAM   = SAM FLAG. SET IFF THE FRONT-END NPU IS EQUIPPED WITH
*               THE SAM MECHANISM.
*       C2    = COUPLER CHANGE FLAG. SET BY PIP WHEN IT PERFORMS THE
*               EST SCAN FUNCTION IF AN OFF NP/NQ ENTRY IS TURNED ON. 
*               CLEARED BY NIP WHEN THE ENTRY IS PROCESSED. 
* 
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