AN / USQ-17
The AN / USQ-17 also called Naval Tactical Data System (NTDS) or UNIVAC M-460 , designates a computer system which was built by Sperry Rand . This was Seymour Cray's last work for Sperry Rand.
The machine was about the size of a bathtub , about four feet high. Shortly after the design of the machine was completed, Semour Cray left Sperry Rand and moved to Control Data Corporation (CDC). When Sperry Rand received the order to produce the system from the US Navy , Sperry Rand had to develop the machine from scratch. Except for the instruction set , a new machine was developed under the name AN / USQ-20 .
The instruction set was mapped using 30-bit words:
| Instruction word | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4th | 5 | 6th | 7th | 8th | 9 | 10 | 11 | 12 | 13 | 14th | 15th | 16 | .. | 30th |
| Function code | Jump condition |
Operand interpretation |
Address modification |
Base address | |||||||||||||
Numbers were mapped using 30-bit words. The memory was mapped with 32,768 words of core memory .
See also
Web links
- The Univac M-460 Computer - Paper by JE Thornton, M. Macaulay, and DH Toth, Remington Rand Univac Division of Sperry Rand (on-line version from Ed Thelen's Antique Computer Home Page)