Information AboutIbm 740 |
| CATEGORIES ABOUT IBM 740 | |
| ibm hardware | |
| 740 | |
| graphics hardware | |
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The IBM 740 CRT Recorder was announced in 1954 and used with the IBM 701 , IBM 704 , and IBM 709 Computer s to draw Vector Graphics images on 35 Mm Photographic Film (i.e. Microfilm ). The 740 Film Recorder contained Digital To Analog Converter s and a 7 inch, high precision, Electrostatic CRT . The raster size was 1024 by 1024, but only 256 resolved spots could be displayed on an axis line. The CRT used a short Persistence ''P11'' Phosphor . Film was stored in a magazine that could hold up to 100 Feet and could be advanced under computer control. ASA 200 Speed Film was recommended. The IBM 780 CRT Display was a monitor that could be attached to the 740 and mirror to an operator what was being drawn on 740's CRT. The 780 had a 21 Inch CRT with a long persistence (2 second, nominal) ''P7'' phosphor. ''For a more evolved IBM graphics system see'' IBM 2250 . REFERENCE IBM 709 Data Processing System, Form A22-6501-0, 1958 . EXTERNAL LINKS |
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