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IBM 714
The IBM 711 was a punched card reader used as a peripheral device for IBM mainframe vacuum tube computers and early transistorized computers. Announced on May 21, 1952, it was first shipped with the IBM 701. Later IBM computers that used it were the IBM 704, the IBM 709, and the transistorized IBM 7090 and 7094. Overview The 711's read mechanism was based on the IBM 402's and could read 150 cards per minute (250 cards per minute on the IBM 7090). It included a control panel that could be wired to transfer any 72 columns out of the 80 on a card into the computer's memory, though in practice the panel was almost always wired to read the first 72 columns. Cards were read in binary format. Data from each row was read into two 36-bit words, starting with row 9, for a total of 24 words per card. Computer object code could then be executed directly. Conversion to characters or numbers was done in software. The 72 column restriction influenced early computer languages, such as Fortran a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM 1402
The IBM 1402 was a high-speed Punched card reader, card reader/punch introduced on October 5, 1959 as a peripheral input/output device for the IBM 1401 computer. It was later used with other computers of the IBM 1400 series and IBM 700/7000 series, IBM 7000 series product lines. It was adapted as the IBM 1622 Card Read-Punch for the IBM 1620 and provided the basic design for the models IBM 2501, 2501, IBM 2520, 2520 and IBM 2540, 2540 equipment used with the IBM System/360 product line. Specifications Card reader * Card read speed up to 800 punched cards per minute (models 1, 2 and 3) or 450 cards per minute (models 4, 5 and 6). * Card input file for 3,000 cards (models 1, 2, 3, 4 and 6) or feed hopper for 1,200 cards (model 5). * Three stackers (NR, 1, 2/8) with approximately 1,000-card capacity hold cards after they are read. Card punch * Card punch speed up to 250 cards per minute (all models). * Feed hopper for 1,200 cards (all models). * Three stackers (NP, 4, 2/ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
