IBM System/360 architecture
The IBM System/360 architecture is the model independent architecture for the entire S/360 line of mainframe computers, including but not limited to the instruction set architecture. The elements of the architecture are documented in the IBM System/360 Principles of Operation and the IBM System/360 I/O Interface Channel to Control Unit Original Equipment Manufacturers' Information manuals.
| Designer | IBM |
|---|---|
| Bits | 32-bit |
| Introduced | April 7, 1964 |
| Design | CISC |
| Type | Register-Register Register-Memory Memory-Memory |
| Encoding | Variable (2, 4 or 6 bytes long) |
| Branching | Condition code, indexing, counting |
| Endianness | Big |
| Page size | N/A, except for 360/67 |
| Open | Yes |
| Registers | |
| General-purpose | 16× 32-bit |
| Floating point | 4× 64-bit |
| History of IBM mainframes, 1952–present |
|---|
| Market name |
| Architecture |
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