Merge branch 'patch-1' into 'master'

add .svg to README.md See merge request engintime/Dream-Logic/Intel-classic-chips/8253!2

Merge branch 'patch-1' into 'master'
a762bfa8 · 李川 · 662e792d · 64a96a51 · a762bfa8
--- a/README.md
+++ b/README.md
 # 说明
 Intel 8253 可编程定时计数器
\ No newline at end of file
+# 原理图
+![8253](https://www.codecode.net/engintime/Dream-Logic/Intel-classic-chips/8253/raw/master/8253.dlsche.svg)
\ No newline at end of file