This keymap is based on Windows Arial Unicode and Tamil Latha Unicode.
It will work with other Tamil Unicode Fonts ArulMathi, InaiKathir, InaiMathi and TabAvarangal2
If the below Tamil letters readable (similar to the below picture),
OK, your system is supporting Unicode.
Windows 2000 and Win XP support Unicode
Tamil Unicode keymap (English key letter is in the middle, to show key position)
Tamil keyboard map without English key in Middle.