INT 62 u - FGDRIVER v3.03 - "FG_ALLOCCMS" - CREATE LOGICAL VIDEO PAGE (CONVMEM)
        AX = 0001h
        BX = page number (0001h-003Fh)
Return: AX = status (0000h,FFFCh,FFFDh,FFFEh) (see below)
Notes:  For FGDRIVER v1.10, this function was "FG_SETMODE" (see AX=0093h);
          "FG_ALLOCCMS" was AX=009Dh
        The only operation which is allowed on logical pages is "FG_COPYPAGE"
          (see AX=0012h)
SeeAlso: AX=0000h,AX=0002h,AX=0003h,AX=0012h,AX=002Eh

Values for status:
 0000h  successful
 FFFCh  insufficient memory
 FFFDh  page already created, or exists as physical or virtual page
 FFFEh  invalid page number
 FFFFh  memory manager not initialized

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