#define  I386MAGIC      0x14c
#define I386AIXMAGIC   0x175

block filehdr
{
  word  f_magic;     /* magic number             */
  word  f_nscns;     /* number of sections       */
  dword f_timdat;    /* time & date stamp         */
  dword f_symptr;    /* file pointer to symtab   */
  dword f_nsyms;     /* number of symtab entries */
  word  f_opthdr;    /* sizeof(optional hdr)     */
  word  f_flags;     /* flags                    */
}

edi = @obj as filehdr;

if( (edi.f_magic!=I386MAGIC) and (edi.f_magic!=I386AIXMAGIC) )
{
  print('this is not obj file');
} 

  cmp word[edi.f_magic],I386MAGIC

block FILEHDR {
 word  f_magic; 
 word  f_nscns; 
 dword f_timdat;
 dword f_symptr;
 dword f_nsyms; 
 word  f_opthdr;
 word  f_flags; 
}

FILEHDR MyFile = $incbin('myfile.obj'); 

FILEHDR MyFile = $incbin('myfile.obj', 0x100);        // includes data from file only from 0x100 offset 
FILEHDR MyFile = $incbin('myfile.obj', 0x100, 0x200); // includes 0x200 bytes from file from 0x100 offset 

byte MyPicture[] = $incbin('mypicture.dat');
sysword PicSize = sizeof MyPicture; // get size of picture