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Merge branch 'lab2' into 'master'

修改项目模板 See merge request engintime/Dream-Logic/Project-Template/Microcomputer/Lab002!4
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<text alignment-baseline="after-edge" fill="#000000" font-family="微软雅黑" font-size="325" font-weight="700" text-anchor="start" x="18" y="402">实验二：可编程并行接口8255</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="12228" y="1842">（4）按下按键A，输入一个负脉冲</text>
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top_demand.dlsche.svg deleted 100644 → 0
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<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="11572" y="1687">2</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="11448" y="1351">CDC_HEX_DIG</text>
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<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="15" font-weight="400" text-anchor="start" x="11578" y="1722">PA1</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="15" font-weight="400" text-anchor="start" x="11528" y="1722">PA2</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="15" font-weight="400" text-anchor="start" x="11478" y="1722">PA3</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="9528" y="2922">Key = A</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="微软雅黑" font-size="325" font-weight="700" text-anchor="start" x="18" y="452">实验二：可编程并行接口8255</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" transform="rotate(180 10968 1826)" x="10968" y="1826">NOT</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="12228" y="1622">实验步骤：</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="12228" y="1672">（1）启动仿真</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="12228" y="1722">（2）按下R键复位</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="12228" y="1772">（3）设置B端口（PB7~PB0）的输入为10</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="12228" y="1822">（4）按下按键A，输入一个负脉冲</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="12228" y="1872">（5）程序执行完后，观察A口（PA7~PA0）输出</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="12228" y="1922">（6）打开存储器窗口RAM，找到B端口输入地址指定单元，将其内容与A端口输出比较</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="12228" y="1972">（7）结果相同，正确</text>
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