Question

1. Which Direction flag setting causes index registers to move backward through memory when executing string primitives?
2. When a repeat prefix is used with STOSW, what value is added to or subtracted from the
   index register?
3. In what way is the CMPS instruction ambiguous?
4. When the Direction flag is clear and SCASB has found a matching character, where does
   EDI point?

Assembly language^

Answer 1