Question: 1. What is a modified Hamming code, and what are its advantages over a standard Hamming code?

2. Hamming codes become more efficient (efficiency is the ratio of check bits to total word length) as the number of bits in the source word increases. Consequently, a 16-bit 68000 with an ECC memory should be more efficient than an 8-bit 6800 with an ECC memory. A 68020 with its 32-bit data bus should be even more efficient. Why is this efficiency so hard to realize in practice?