Motorolla MC68HC11 Microcontroller-to convert a Hex digit.

Hello,
I am require to write a program module to convert a Hex digit passed to it in the lower nibble of Accumulator A to its ASCII character code. The upper nibble should be treated as "don't care".
Return the ASCII code in Accumulator A and save it in a suitable memory location.
All other CPU register values are to remain unchanged.


Thanks in advance for your help...

Regards...