D9J6    #MAC  FSUD  
 D=3Q          LDN   %A BSUD 
 D=HB    MFSUD LDX   %A FPTR(%A) 
 D?32          TXL   %A BIT11
 D?GL          BCS      %C   
 D#2=          TXU   %B HSUDNO(%A)   
 D#FW          BCS      MFSUD
 D#^G    #NOR