UNIVAC 1230
| Company type | Military computer system |
|---|---|
| Industry | Military electronics, Computing |
| Founded | 1961 |
| Headquarters | United States |
| Products | Military computers, Avionics computers |
The AN/USQ-20, also known as the CP-642, was engineered as a more dependable follow-up to the Seymour Cray-designed AN/USQ-17, preserving the identical instruction set. The U.S. Navy received the first batch of 17 units starting in early 1961.
A related model, the UNIVAC 1206, was utilized by other branches of the military as well as NASA, whereas the G-40 variant succeeded the vacuum tube-based UNIVAC 1104 within the framework of the Bomarc Missile Program.
According to the Joint Electronics Type Designation System (JETDS), the designation "AN/USQ-20" signifies the twentieth Army-Navy electronic apparatus classified as general utility special combination equipment—a standardized naming practice for Department of Defense electronic devices.
Technical
The system stood approximately six feet in height (around 1.80 meters), bearing a resemblance to a double-door refrigerator.
Instruction words were 30 bits in length, divided into fields including a 6-bit function code, a 3-bit jump condition designator, a 3-bit partial word designator, a 3-bit index register selector, and a 15-bit operand address.
Data words also measured 30 bits and could hold five 6-bit alphanumeric characters each.
The main memory comprised 32,768 words of core memory.
Processor registers featured:
- A single 30-bit arithmetic accumulator (A register)
- One continuous 30-bit Q register that combined with A for operations involving 60 bits
- Seven index (B) registers of 15 bits each, with B0 permanently set to zero
See also
- List of military electronics of the United States
- CMS-2
- List of UNIVAC products
- History of computing hardware
- Military computers
External links
- UNIVAC-NTDS: UNIVAC 1206, AN/USQ-20 – Antique Computer website