[[mcmaster:nec:d7220d]]
 
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mcmaster:nec:d7220d [2019/04/19 06:57]
mcmaster created 		mcmaster:nec:d7220d [2021/12/31 10:38]
cr1901 [Die]
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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 ======
Line 6: Line 6:
  
 <code> <code>
 +NEC JAPAN
 +D7220D-1
 + 8442E9
 </code> </code>
  
Line 15: Line 18:
 ====== Die ====== ====== Die ======
  
 +Copyright:
 <code> <code>
 +(C) NEC 1980
 + D7220
 +</code>
 +
 +Label:
 +<code>
 +GDC
 </code> </code>
  
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     * [[https://siliconpr0n.org/map/nec/d7220d/single/nec_d7220d_mz_mit20x.jpg|Single]] (15192x14949, 66.97MB)     * [[https://siliconpr0n.org/map/nec/d7220d/single/nec_d7220d_mz_mit20x.jpg|Single]] (15192x14949, 66.97MB)
 +
 +
 +====== 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
 +
  
 
mcmaster/nec/d7220d.txt ยท Last modified: 2023/02/16 10:17 (external edit)
 
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