IDENT    SYSYMB
          TITLE    SYSTEM SYMBOLS AND CELLS
          ENTRY    S.SAVE1,S.SAVE2
S.SAVE1   BSS       1
S.SAVE2   BSS       1
*
          ENTRY    S.MASTR,S.OLDTM,S.CHARG,S.SYSTM,S.USRTM,S.SWPTM
          ENTRY    S.QUANT,S.INTIM
          ENTRY    S.IDLTM
S.MASTR   BSSZ     1              MASTER CLOCK
S.CHARG   BSSZ     1              CHARGE CLOCK
S.QUANT   VFD      1/1,59/0      QUANTUM CLOCK
S.OLDTM   BSSZ     1           TIME OF LAST CLOCK UPDATE BY ECS SYSTEM
S.INTIM   BSSZ      1         TIME CURRENT PROCESS WAS SWAPPED IN
S.SYSTM   BSSZ     1              SYSTEM TIME
S.USRTM   BSSZ     1              USER TIME
S.SWPTM   BSSZ     1              SWAP TIME
S.IDLTM   BSSZ     1             IDLE TIME
*
          ENTRY    CLKWAIT
CLKWAIT   EQU      25            DELAY IN 2^S OF MICROSECONDS TO BE SURE
*                                QUANTUM CLOCK IS RESET
*
          ENTRY     I.LOCK,I.WAIT
I.LOCK    BSS       1
I.WAIT    BSSZ      1
*
          ENTRY     S.USERA,S.USRB1
S.USERA   BSS       1              CM ADDR FOR PPU CHECKING OF RA+1
S.USRB1   BSS       1
          END