Int 10 Fn C000  - S3 Speedup V3.00+ - Installation Check                   [V]

   AX = C000h

Return: AX = FFFFh if installed
       DX = version number (binary, DH=major, DL=minor)
       BX = resident code segment
Program: S3SPDUP is a freeware TSR by Dietmar Meschede to improve the speed
     of chained video modes (both VESA and VGA Mode 13) on S3-chipset
     video cards

See Also: AX=C001h,AX=C002h,AX=C003h,AX=D000h"S3VBE"