The $$starter code$$ is a program that supports the following commands, except that the code for two of the

commands is incomplete:

a bitwise AND

c CLEAR a particular hex digit $($to be completed by the student$).$

d DEFINE new contents for specific Hex digit. $($to be completed by the student$).$

h print help text.

l bitwise LEFT SHIFT

n NEGATE $($invert$)$ all bits.

o bitwise OR

r bitwise RIGHT SHIFT

s SET data value

q QUIT $($end the program$).$

v SET or CLEAR the $$verbose mode$$ feature.

x bitwise XOR

demo demonstrate the use of $$Verbose Mode$$ code $($debug aids$).$

The code for each command calls a function that performs the task of that particular command.