2.3.1. Setting and Resetting Flags

Try these first

1. 1.

   What is the purpose of the overflow flag?

   Hint

   Consider the limits of the number of bits.

2. 2.

   What does the zero flag signify?

   Hint

   Think of a situation where a calculation results in nothing.

3. 3.

   What indicates an overflow condition in arithmetic operations?

   • The zero flag
   • The overflow flag
   • The sign flag

   Hint

   Think about when a number gets too large.

4. 4.

   True or False: The zero flag is set when an operation's result is non-zero.

   • True
   • False

   Hint

   Remember what the zero flag signifies.

5. 5.

   Assuming you added two signed 4-bit numbers 0111 (7) and 1110 (-2). What would the flags indicate?

   Hint

   Calculate and check the final output against the flags.

6. 6.

   You are tasked to create a control algorithm that adjusts based on various flags. Outline how your algorithm would respond if the overflow flag is set.

   Hint

   Think about error handling techniques.