I did NOT look up your LCD , but assumes it is "Hitachi HD44780" compatible , most characterbased LCD displays are.
10 seconds with google reveals this
**broken link removed**
I will leave the challenge of interfacing to the HC11 up to you.
But it might be a good idea to use "HD44780" as one of the google parameters , it should ensure lots of hits (also for the hw. connection).
Btw: Pay attention to the initialization routine if you choose to tun in 4-bit mode , that is the only pitfall in 4bit vs 8bit mode.
/Bingo
Hmmm.. Are you sure the Lcd name isnt TIANMA ??