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mcmaster:nec:d7220d [2019/04/19 02:57] mcmaster created |
mcmaster:nec:d7220d [2019/04/19 03:13] lord_nightmare add more info and links about the uPD7220 |
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| - | {{tag>collection_mcmaster vendor_nec type_unknown year_unknown foundry_unknown}} | + | {{tag>collection_mcmaster vendor_nec type_unknown year_1984 foundry_unknown}} |
| ====== Package ====== | ====== Package ====== | ||
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| <code> | <code> | ||
| </code> | </code> | ||
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| + | ====== Additional Information ====== | ||
| + | The uPD7220 was designed by Tetsuji Oguchi, and information and schematics for the 7220 and 7220A can be found on his website: http://oguchi-rd.com/LSI%20products.php | ||
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| + | The schematics are at http://oguchi-rd.com/schematics/logic/7220A/7220A%20Schematics.pdf | ||
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| + | The patents for certain covering the the 7220 are: | ||
| + | 4,459,676 - covers the accelerated bresenham curve drawing scheme | ||
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| + | Other patents which probably cover the 7220 are: | ||
| + | 4,356,482 | ||
| + | 4,491,834 | ||
| + | 4,545,014 | ||
| + | 4,570,222 | ||
| [[https://siliconpr0n.org/map/nec/d7220d/mz_mit20x/|mz_mit20x]] | [[https://siliconpr0n.org/map/nec/d7220d/mz_mit20x/|mz_mit20x]] | ||