When the 68000 executes a write operation to an odd byte it

Question

Question: 1. When the 68000 executes a write operation to an odd byte, it asserts LDS* and places data on D₀₀ - D₀₇. What happens to D₀₈ - D₁₅ during this operation and why?

2. Design a decoder that produces five outputs, one for each of the following operations:

a. Valid memory access to user data space

b. Valid memory access to user program space

c. Valid memory access to supervisor data space

d. Valid memory access to supervisor program space

e. Valid memory access to interrupt acknowledge space