The 8080 was also castigate for not having index registers—an intentional decision I had made, because I favored general-purpose 16 bit operations instead. By 1972, I had programmed about a dozen different computers.A characteristic of most fixed-word-length machines is their use of index registers for array addressing. However, in the older multibyte machines (such as the IBM 1620, the IBM 1401, and so on),