*COMDECK  COMSSCR 
          CTEXT  COMSSCR - S/C REGISTER EQUIVALENCES. 
          BASE   M
          SPACE  4
*         COMMENT COPYRIGHT CONTROL DATA CORP. 1974.
          SPACE  4
***       COMSSCR - S/C REGISTER EQUIVALENCES.
*         J. D. LANGE        74/05/10.
          SPACE  4
***              COMSSCR DEFINES EQUIVALENCES WHICH ARE USED
*         FOR PROGRAMMING THE STATUS/CONTROL (S/C) REGISTER 
*         ON THE CYBER 170. 
          SPACE  4
****
  
**        S/C REGISTER EQUIVALENCES.
  
  
*         DESCRIPTOR FUNCTIONS. 
  
 FCRD     EQU    0000        READ WORD
 FCTB     EQU    1000        TEST BIT 
 FCCL     EQU    2000        CLEAR BIT
 FCTC     EQU    3000        TEST AND CLEAR BIT 
 FCSB     EQU    4000        SET BIT
 FCTS     EQU    5000        TEST AND SET BIT 
 FCCA     EQU    6000        CLEAR ALL
 FCTE     EQU    7000        TEST ERROR 
  
*         BIT NAMES.
  
 SECD     EQU    3           CM SECDED ERROR
 PPUE     EQU    4           PPU ERROR FOR FLPP-S (176 ONLY)
 CMCE     EQU    5           CMC PARITY ERROR (171 - 175 ONLY)
 EISP     EQU    10D         ERROR IN SECOND PPS
 LSCD     EQU    11D         LCME SECDED ERROR (176 ONLY) 
 MAPF     EQU    36D         MAINS POWER FAILURE
 SHIM     EQU    37D         SHUTDOWN IMMINENT
 EXBB     EQU    54D         EXCHANGE BUFFER BIAS BIT 0 (176 ONLY)
 DSFP     EQU    58D         DEADSTART FLPP (176 ONLY)
 DDFP     EQU    59D         DUMP FLPP (176 ONLY) 
 SCSL     EQU    72D         SCANNER SELECT BIT 0 (176 ONLY)
 BCXC     EQU    76D         BLOCK COPY EXIT CONTROL                     DIMA219
 DSCU     EQU    77D         DEADSTART CPU (176 ONLY) 
 ENSC     EQU    82D         ENABLE SCANNER INTERFACE (176 ONLY)
 CPUE     EQU    83D         CLEAR PPU (FLPP) PARITY ERROR (176 ONLY) 
 PPCT     EQU    84D         PPU MAJOR CYCLE TIME SELECT
 PPCM     EQU    94D         STOP ON CM READ ERROR
 PPPE     EQU    95D         STOP ON PP MEMORY PARITY ERROR 
 DSBL     EQU    118D        DISABLE SINGLE BIT LOGGING 
 PCMP     EQU    119D        PPU CM READ PARITY ERROR 
 CCIO     EQU    127D        CPU CLEAR I/O (176 ONLY) 
 SPUM     EQU    137D        STOP ON PPU MEMORY PARITY ERROR             DIMA223
 CCRT     EQU    168D        CM CLEAR RANK II ERROR (176 ONLY)
 CCRO     EQU    169D        CM CLEAR RANK I ERROR (176 ONLY) 
 LCRT     EQU    176D        LCME CLEAR RANK II ERROR (176 ONLY)
 LCRO     EQU    177D        LCME CLEAR RANK 1 ERROR (176 ONLY
 DLSL     EQU    178D        DISABLE LCME SINGLE BIT LOGGING
 CTBB     EQU    179D        CHANNEL 2,3 BUFFER BIAS BIT 0 (176 ONLY) 
 SDSC     EQU    183D        CM DOUBLE BIT SECDED ERROR 
 LDSC     EQU    196D        LCME DOUBLE BIT SECDED ERROR 
  
*         WORD NAMES. 
  
 PPEW     EQU    1           PP MEMORY PARITY ERROR WORD
 CMAW     EQU    4           CM SECDED ERROR ADDRESS WORD 
 EBBW     EQU    4           EXCHANGE BUFFER BIAS BIT WORD (176 ONLY) 
 LCAW     EQU    10          LCM SECDED ERROR ADDRESS WORD (176 ONLY) 
 CBBW     EQU    17          819 CHANNEL BUFFER BIAS BIT WORD (176 ONLY)
 CDSW     EQU    17          CM DOUBLE BIT SECDED ERROR WORD
 LDSW     EQU    20          LCME DOUBLE BIT SECDED WORD (176 ONLY) 
 PMSW     EQU    20          PP MEMORY SELECT SWITCH WORD (176 ONLY)
  
*         CONSTANTS.
  
 NTEB     EQU    50          NUMBER OF TEST/ERROR BITS
 DSBT     EQU    500D        DEADSTART SINGLE BIT ERROR THRESHOLD 
 OSBT     EQU    10D         ON-LINE SINGLE BIT ERROR THRESHOLD 
 OLST     EQU    10D         ON-LINE LCME SINGLE BIT ERROR THRESHOLD
 NSCB     EQU    21          NUMBER OF S/C REGISTER (BYTES) WORDS 
 NBIT     EQU    314         NUMBER OF S/C REGISTER BITS
  
*         SCR PROCESSING (*1MB*) FUNCTION CODES.
  
 SPLG     EQU    0           LOG SCR ERRORS 
 SPTP     EQU    1           TIME PROCESSING
 SPMX     EQU    2           MAXIMUM NUMBER OF FUNCTION CODES 
  
****
          SPACE  4
          BASE   *
          ENDX
