Since MCL Mangai is not Unicode, you cannot type it directly using Windows built-in Tamil input. You need software that translates the keyboard layout into TSCII.
To create a character like "கி" (Ki), you often type the consonant "க" followed by a specific key that adds the top hook (the 'i' sound). mcl mangai tamil font keyboard layout
Another excellent utility that allows you to map custom keystrokes directly to legacy fonts like MCL, TSCII, and TAB/TAM formats. MCL Mangai vs. Modern Unicode Fonts Since MCL Mangai is not Unicode, you cannot
Because MCL Mangai is a legacy font, it does not use the standard standard Tamil 99 or Anjal (phonetic) keyboard layouts by default. Instead, it relies on a proprietary character-mapping system, often closely mirroring the classic or standard bilingual layouts. Since MCL Mangai is not Unicode