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 3D

See also: 3B

3C - FLOATING POINT EMULATION - INSTRUCTIONS WITH SEGMENT OVERRIDE