INT 3C - FLOATING POINT EMULATION - INSTRUCTIONS WITH SEGMENT OVERRIDE

Notes:	the floating-point emulators in Borland and Microsoft languages and
	  Lahey FORTRAN use this interrupt
	the generated code is  CD 3C xy mm ....
	  where xy is a modified ESC instruction and mm is the modR/M byte.
	  The xy byte appears to be encoded as
		s s 0 1 1 x x x	  or	s s 0 0 0 x x x
	  where "ss" specifies the segment override:
		00 -> DS:
		01 -> SS:
		10 -> CS:
		11 -> ES:
SeeAlso: INT 3B,INT 3D