1. 以数据表格形式在 ROM 中建立一个含有正数和负数的表格，数据长度为16 个字节，要求放置八个正数、八个负数，正、负数应离散随机放置，不允许三个以上同类型数据连续放置，数据的具体内容自行确定；
2. 编制程序，将数据表格中的数据读出并按正、负数归类，正数送入首地址为 40H 的内部 RAM 中；负数送入首地址为 0B000H 的外部 RAM 中；
3. 将首地址为 0B000H 的外部 RAM 中的数据取出并求其绝对值，然后送入内部 RAM 的 48H～4FH 单元。(1. data form is established in ROM with a positive and negative form, the data length is 16 bytes, the requirements placed eight positive, eight negative, positive and negative discrete randomly placed, does not allow three or more of the same type continuous data placement, data to determine the specific content;
2., compile program, read out the data in the data table, classify it in positive and negative numbers, send positive numbers into the internal RAM with the first address of 40H, and send the negative number to the external RAM with the initial address of 0B000H.
3. take out the data in the external RAM with the first address of 0B000H and seek its absolute value, and then send it into the 48H to 4FH unit of the internal RAM.)