ext00     headr
     SNAPSH    equ  333   
     PHASLD    equ  381   
     SNAPEX    equ  564   
     LOADNX    equ  700   CARD OVERLAY UNLESS NOP
     CDOVLY    equ  700   1 IF LOADING FROM CARDS, N IF FROM TAPE
     TPREAD    equ  704   LOAD OVERLAY FROM TAPE
     TPERR     equ  728