Contents
How many register does an IBM 360 have?
15
In the case of System/360 the base address is contained in one of 15 general registers.
How many floating point registers are there in IBM 360?
Short precision addition or subtraction takes 3.81 microseconds; long precision takes 6.32 microseconds. Operations are executed in any of four 64-bit floating point registers.
What type of computer is the IBM System or 360 Model 195?
System/360 Model 195, announced today, is the most powerful computer in IBM’s product line. It uses monolithic circuits, has a high-performance buffer memory and can perform many functions simultaneously.
When did the IBM System 360 come out?
The IBM System/360 was a groundbreaking family of mainframe computers announced introduced in 1964, and much of the success of System/360 was due to core memory technology. The S/360 was an extremely risky “bet-the-company” project that cost IBM over $5 billion .
How did IBM come up with core memory?
One innovation in IBM’s core memory design was to weld the planes together directly. Alternating pins along the edges of the plane were bent up or down and welded to the neighboring plane, simplifying manufacturing. This structure is shown in the photo below. Eighteen core planes were stacked to store two bytes along with two parity bits.
How big is the IBM’s / 360 Core array?
A 64 KB core array from the IBM S/360 Model 50. There are 18 core planes stacked front-to-back. The blue cables are the sense/inhibit lines. Driver cards are plugged into the front of this array.
What did the IBM’s / 360 Model 40 do?
The IBM S/360 Model 40. Photo source unknown. The IBM S/360 Model 40 was a compact system (for the time), with the computer in one frame known as the main frame. This frame held the circuit cards that make up the CPU, along with the power supplies, microcode (stored on metalized mylar sheets read by transformers), and core memory storage.