This is a radix conversion problem. Here are some hints.

As with all problems, the first thing to do is to state the problem as clearly as possible.

I assume you want to:

Convert an 8-bit binary value to ASCII hexadecimal characters.

A hexadecimal digit represents 4-bits, therefore you need to extract two 4-bit values from the 8-bit word. See instructions ANL and SWAP.

Having obtained a 4-bit value you need to convert it to the equivalent ASCII character. There are a number of ways of doing this, the main ones are explored in the following link:

http://www.programmersheaven.com/zone5/cat.../32816.htm

Enjoy.