Field              Field  Off Leng           Description
    Name               Type   set

   IEWBMAP                              Module Map, Version 2
   MAPH_BUFFER_ID      Char     0   8   Buffer identifier "IEWBMAP"
   MAPH_BUFFER_LENG    Binary   8   4   Length of the buffer,
                                           including the header
   MAPH_VERSION        Binary  12   1   Version identifier
   *** RESERVED ***    Binary  13   3   Reserved, must be zeros
   MAPH_ENTRY_LENG     Binary  16   4   Length of each entry
   MAPH_ENTRY_COUNT    Binary  20   4   Number of entries in the list
   *** RESERVED ***    Binary  24   8   Reserved, initialize to zeros
   MAPH_ENTRY_ORIGIN           32       First map entry

1  MAP_ENTRY                            Map Entry
   MAP_NEXT            Binary   0   4   Offset of next sibling entry
   MAP_TYPE            Char     4   1   Type of map entry
       'M'                                Module
       'C'                                Class
       'O'                                Overlay segment
       'S'                                Section within class
       'P'                                Part within class
       'L'                                Label within section
       'X'                                Text extent within section
                                            or part
       'E'                                End-of-module
2  MAP_FLAGS           Bit      5   1   Flags
       1... ....                          Single extent implied (S)
       .1.. ....                          Loadable text class (C)
       ..1. ....                          Class is executable text (C)
       ...x xxxx                          Reserved
2  MAP_NAME            Name     6   6   Name of mapped element
                                          Null (M, X, E)
                                          region & segment (O)
     MAP_NAME_CHARS    Binary   6   2     length of name in bytes (O)
     MAP_NAME_PTR      Pointer  8   4     pointer to name string
         MAP_REGION    Binary   8   2       Region number (O)
         MAP_SEGMENT   Binary  10   2       Segment number (O)
2  MAP_OFFSET          Binary  12   4   Offset
                                          class offset (O, S, P)
                                          section offset (L, X)
                                          zero (M, C)

    Field              Field  Off Leng           Description
    Name               Type   set

2  MAP_QUANTITY        Binary  16   4   Number of logical records/bytes
                                          Sum of all classes (M)
                                          Zero (L)
2  MAP_NAME_SPACE      Binary  20   1   Name space of label
       X'01'                              External Labels (L)
       X'02'                              Pseudoregisters (P)
       X'03'                              Parts (P)
       X'04'-X'07'                        Reserved
   *** RESERVED ***    Binary  21   1   Reserved.
2  MAP_RECORD_FMT      Binary  22   2   Class data format/record length
                                          Zero (M, E)
                                          Record length (C,O,S,L,P,X)
   *** RESERVED ***    Binary  24   8   Reserved.