Microprocessor Simulator 0 Help

Character Input Output

11. 
    Easy! Input characters and display each character at the top left position of the VDU by copying them all to address [C0].
    
12. 
    Harder Use BL to point to address [C0] and increment BL after each key press in order to see the text as you type it.
    
13. 
    Harder! Store all the text you type in RAM when you type it in. When you press Enter, display the stored text on the VDU display.
    
14. 
    Difficult Type in text and store it. When Enter is pressed, display it on the VDU screen in reverse order. Using the stack makes this task easier