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mcmaster:nec:d7220d

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mcmaster:nec:d7220d [2019/04/19 06:57] – created mcmastermcmaster:nec:d7220d [2019/04/19 07:13] – add more info and links about the uPD7220 lord_nightmare
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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>
 +
 +====== 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
 +
 +The schematics are at http://oguchi-rd.com/schematics/logic/7220A/7220A%20Schematics.pdf
 +
 +The patents for certain covering the the 7220 are:
 +4,459,676 - covers the accelerated bresenham curve drawing scheme
 +
 +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]]
mcmaster/nec/d7220d.txt · Last modified: 2025/05/18 00:26 by 127.0.0.1