Offset     Type        Length   Name       Description

   0                      88       ADMTDSA    Standard DSA declaration
   0          C           4        DSAWORD1
   0          C           2        DSAFLAGS   Reserved set to x'0000' first byte is
                                              committed to always remain zero
   2          F           2        DSALEN     Allocated DSA length
   4          A           4        DSALAST    A(Last DSA)
   8          A           4        DSANEXT    A(Next DSA)
   C          A           60       DSARSA     Register save area
   48         C           8        DSASTATE   State controls propagated down
                                              via ADMMBEG macro
   48         A           4        DSAHDR     A(DSA stack header)
              1... ....            DSATRCE    Trace optimization bit
              .111 1111            *
   4C         A           4        DSASOSP    A(Short on storage element)
              1... ....            DSASOSEF   SOS event in progress
              .111 1111            *
   50         A           4        DSAEPTR    Pointer to DSA extension
   54         A           4        *          Reserved
   58         C           *        *          User area

   In the DSA extension (addressed from DSAEPTR):

   0          C           *        ADMTDSAE   Extension block
   0          C           4        DSAEDSAE   Room for an eye catcher later
   4          C           4        DSACNTRL   Standard DSA controls
   4          F           1        DSANEST    DSA nesting level
   5          C           3        *          Reserved
   8          A           4        DSATRCSV   R14/R15 trace save slot
   C          A           4        DSAERRPL   Error stack pointer for calls
   10         A           4        DSAERRPP   Error stack pointer for process
   14         C           4        *          Reserved
   18         C           *        DSAEEND    End of extension stack