Information about Ibm 370
For the IBM mainframe computer, see .
The IBM 370 printer was used on the IBM 305 RAMAC computer system, introduced by IBM on September 14, 1956. The 370 was connected to the 305 by a serial data line from the S track of the computer's drum memory and printed 80-columns with a punched tape controlled carriage. Line formatting was programmed by inserting wire jumpers into a plug-board.
The printer mechanism used an eight sided, seven position (56 character) print slug in a horizontal orientation. The X, O, and 2 bits of the character code rotate the slug and the 1, 4, and 8 bits selected the position. The platen hammer then struck the paper from behind, causing the selected character to print. Of the 56 characters on the print slug, only 48 were printable with the standard valid character set of the IBM 305 computer.
IBM 305 RAMAC was the first commercial computer that used a moving head hard disk drive (magnetic disk storage) for secondary storage. IBM introduced the storage unit on September 4, 1956 before unveiling the entire computer nine days later on September 13.
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International Business Machines Corporation
Public (NYSE: IBM )
Founded 1889, incorporated 1911
Headquarters Armonk, New York, USA
Key people Samuel J.
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Public (NYSE: IBM )
Founded 1889, incorporated 1911
Headquarters Armonk, New York, USA
Key people Samuel J.
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September 14 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.
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Events
- 786 - Harun al-Rashid becomes the Abbasid caliph upon the death of his brother al-Hadi.
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19th century - 20th century - 21st century
1920s 1930s 1940s - 1950s - 1960s 1970s 1980s
1953 1954 1955 - 1956 - 1957 1958 1959
Year 1956 (MCMLVI
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1920s 1930s 1940s - 1950s - 1960s 1970s 1980s
1953 1954 1955 - 1956 - 1957 1958 1959
Year 1956 (MCMLVI
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Drum memory was an early form of computer memory that was widely used in the 1950s and into the 1960s, invented by Gustav Tauschek in 1932 in Austria. For many machines, a drum
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Punched tape or paper tape is a largely obsolete form of data storage, consisting of a long strip of paper in which holes are punched to store data. It was widely used during much of the twentieth century for teleprinter communication, and later as a storage medium for
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plug-board, or, more formally, a control panel, was a device used to direct the operation of unit record equipment (and some early computers) built by IBM and other companies during the punch card era.
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