Merge branch 'patch-1' into 'master'

add .svg to README.md See merge request !3

Merge branch 'patch-1' into 'master'
eecf9604 · 李川 · e5651a72 · 2488fbe6 · eecf9604
--- a/README.md
+++ b/README.md
 # 说明
 Intel 8259A 可编程中断控制器
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+# 原理图
+![8259A](https://www.codecode.net/engintime/Dream-Logic/Intel-classic-chips/8259A/raw/master/8259A.dlsche.svg)
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