76?S ...[??? FLIPW SECT CENT FGN 9 DOC  
 76HL    #     THIS MACRO SWITCHES A MASK IN A SPECIFIED WORD
 773=    #MAC  FLIPW 
 77GW    #ACC  %B
 782G    (   
 78G6          LDX   0  %B   
 78^Q          ERS   0  %A   
 79FB    )   
 79^2    #ACC  %B
 7=DL    #SKI
 7=Y=          ERS   %B %A   
 7?CW    #NOR