Hi Humayun

You are asking too straight like many others.

" can any body help me make codelock using 89c1051 "

Like I would ask, can you help me landing on Moon.

But:

I have to know how to build rockets.
I have to know how to be an astronaut.
I have to know how to cope with radiations.
I have to know how to live in zero gravity.

I have to know a million things......

My appropriate question should be about some specific problem. Like my rocket effeciency with fuel X is not good, what fuel I may be using....

my friend that takes time.

Your question:
===========
I assume you don't mean to lock micro, because you must be using some programer that would facilitate you to lock the bits.

Making code lock is simple.

1. Make an interface of numeric key pad with micro.
2. Make an interface of EEPROM with the micro to store the codes.
3. Make an interface of relay with the micro (or any output device to actuate per your design) .

4. Code every interface properly.

5. Have Fun. (Winking to Erik)


Good Luck

Simon