Each ASCII character will take a one$-$byte slot in a ROM component in Logisim and each slot needs a unique address. How many bits $($n$)$ does the memory address of this ROM component need in order to address each character of your string? Show your calculation. This n will be the $[$# of$]$ data bits attribute of the counter as well as the address bit width attribute for the ROM in the next step.

Step $4$

Build the circuit in Logisim. You need those components:

a clock signal.

a Counter $($under the Memory folder$)$ to generate memory addresses automatically. Set its $$data bits$$ attribute to the n value you get in Step $3.$

a ROM $($under the Memory folder$)$ to store read$-$only data i$.$e$.$ your string. Set its $$address bit width$$ attribute to the n value you get in Step $3.$ Use the default data bit width $8($i$.$e$.$ each stored value is $1$ byte$).$ Click the $$Contents$$ attribute, which says $($click to edit$)$ to open a Hex Editor and enter the ASCII of your string in the ROM one by one. When you$$re done, click the $$Close Window$$ button to save your edit and close the Hex Editor. See Help menu $>$ User$$s Guide $>$ Memory components $>$ Hex editor.

A Bit Selector $($under the Plexers folder$)$ to select the lower $7$ bits of a byte $(8$ bits$).$ Use the default $$data bits$$ attribute of $8$ but set $$Output Bits$$ to $7.$ When connecting the component, connect a $0($use a constant $0$ wire$)$ to its Select input pin.

A TTY $($under the Input$/$Output folder$),$ a dumb terminal acting as your $$monitor$.$ TTY is short for TeleTYpewriter. Its input is a $7-$bit ASCII code, which should come from the $7-$bit output of the Bit Selector. An ASCII code actually only has $7$ bits and TTY only works with those $7$ bits per character. When we store an ASCII code in memory, an extra leading $0$ is added to store it in an $8-$bit slot.