CDC 1700

The CDC 1700 was a 16-bit word minicomputer, manufactured by the Control Data Corporation with deliveries beginning in May, 1966. The 1700 used ones' complement arithmetic and an ASCII-based character set, and supported memory write protection on an individual word basis. It had one general-purpose register and two indexing registers (one of which was implemented as a dedicated memory location). The instruction set was fairly simple and supported seven storage addressing modes, including multilevel (chained) indirect addressing.