SMF 
*NOSEQ
.PROC,SMF.
OFFSW(6)
WHILE,.NOT.SW6,SMFEX. 
SMFEX.
DMB.
SMFEX,RECOVER.
ENDW,SMFEX. 
EXIT. 
DMB.
DMD.
DMD,377777. 
SMFEX,RECOVER.
