drum memory การใช้

• The ABC used regenerative drum memory; The ENIAC used electronic decade counters.
• Later in 1955 a 12k-word drum memory secondary storage system was added as well.
• During execution, user programs are swapped to fixed-head drum memory.
• For many early computers, drum memory formed the main working memory of the computer.
• These surrounded a bell frame housing a drum memory.
• Some drum memories were also used as secondary storage.
• As mass storage was a drum memory available as well as a magnetic tape memory.
• One of the earliest functioning computers to employ drum memory was the Atanasoff Berry computer.
• It used magnetic drum memory of 4, 350 words.
• DATAR was a vacuum tube-based drum memory computer that stored and collected data for display.
• The drum memory held 1K of 40-bit words.
• It contains 113 vacuum tubes, a drum memory disk and a paper tape reader and punch.
• A 4096-word drum memory was added in 1954.
• Historically, drum memory has also been used.
• Lindquist's first optical mark recognition scanner used a mimeograph paper-transport mechanism directly coupled to a magnetic drum memory.
• A drum memory contained a large metal cylinder, coated on the outside surface with a ferromagnetic recording material.
• The SS I had only the standard 5, 000-word drum memory described in this article and no tape drives.
• They also invented a variety of new technologies, including a unique rotating drum memory system with data parity controls.
• Its magnetic drum memory held 2, 160 Single-precision multiplication took 2, 439 microseconds and double-precision multiplication take 16, 700 microseconds.
• The write-once-read-many optical disk memory would be updated monthly, and recently changed data is held on the re-writable magnetic drum memory.