You just have to set the address mapping (page?) for memory and led by using some address decoder, then the CPU read from memory(ram or rom) then output it to led
or may be you could refer your design with old CGA card.
Whole project should not be realised , i have just to draw if in protel.
Resistry + led display shoud be simplest.
Could some give me example of real 16 bit register which can load data, hold data as long as it is needed, until next loading, without shifting, and output data on every clock. Simple classical register.
If you use microcontrolers, you get negative points.
It is for homework, just started doing, know almost nothing.