Int 10 Fn A002  - Ati Mach64 Bios - ???                                    [-]

   AX = A002h
   CL = ??? (bits 2-0 may not be 000)
   CH = ??? (81h or ???)
   DX = segment of ??? (if CH=81h)
   ???

Return: AH = status
       00h successful
       01h failed
   ???

Note:  executes AX=A000h, then AX=A001h if A000h was successful

See Also: AX=A000h,AX=A001h