更新 README.md

c74c2698 · 李川 · eecf9604 · c74c2698
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 # 说明
 Intel 8259A 可编程中断控制器
 # 原理图
-![8259A](https://www.codecode.net/engintime/Dream-Logic/Intel-classic-chips/8259A/raw/master/8259A.dlsche.svg)
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+![raw svg](8259A.dlsche.svg)
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