BSWP

BSEGY and SU (before XDR) share many headers. However, if SU is compiled with XDR, the data and headers become byte swapped. SU with XDR is referred as SUXDR.
bswp  infile   idfc  npts 
 
     infile  = input file name (4char minimum)
 
     Data format                         
     idfc   1=4 byte floating point    
            2=4 byte integer         
            3=2 byte integer         
     npts    =number of samples per trace