On Fri, 15 Feb 2019 09:09:02 -0600, Robert Wessel   
    wrote:   
   >>But those 36 bits should fit into a quad.  It is probably a bug,   
   >>because the OP is right   
   >>   
   >>hchars	dq	FBEFBB800h   
   >>   
   >>does work.   
   >   
   >   
   >With a leading zero.  MASM should interpret the above as a label.   
   >   
   >I played with it a bit more, and it looks like a length limit for the   
   >string.  Converting leading digits of the binary to zero, or adding   
   >more leading zeros to the hex fails the same way.  For example:   
   >   
   >chars64 dq 0000000000000000000000000fbefbb800h   ;fails   
   For hex it can only be 16 digits, more don't fit into a quad.   
      
   	dq	0FFFFFFFFFFFFFFFFH   
      
   still works.   
   >   
   >Remove one of the leading zero, and it's OK.  It look like the limit   
   >is 33 digits, which makes some sense if someone coded the limit back   
   >in the 32 or 16-bit days - that would cover the maximum length number   
   >in binary, including an extra leading zero.   
   >   
   --   
   aen   
      
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