anchor.diff:  1971,Q1B
   1972,KD1
   1973,BPM
  -1973,SQUAD
   1974,DBPM
   1975,DRIFT
   1976,HTRIM
  
positive.code: 1606,D4Aa
  1607,BPM
  1608,D4Ab
  1608,SQUAD
  1609,source
  1610,BB
  1611,D6B
  
negative.code: 1852,D3Ab
  1853,DSEXT
  1854,S2A
  1854,SQUAD
  1854,HSTR
  1854,VSTR
  1855,DSEXT
  1856,D2A
  1857,Q1AD
  1858,D1Aa
  1859,BPM
  