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第四章——第二节
中道正晴隶属于北大阪大学工学院电机工程学系第六研究室，选择的毕业研究主题是利用图形理论的机器人控制。龙腾小说ltxsba.com具体地说，是根据单一方向的视觉辨识，使计算机判断该物体的立体形状。
他坐在书桌前修改程序时，研究生美浓部叫他：“哎，中道，来看看这个。”美浓部坐在惠普个人电脑前，盯着屏幕。
正晴站在学长身后，看向黑白画面，那里显示出三个格眼细密的方格和一个类似潜水艇的图案。他认得这个画面，那是他们称为“submarine”的游戏，内容是尽快击沉潜藏于海底的敌方潜水艇。从三个坐标显示的几项数据推测敌人的位置，正是这个游戏的乐趣所在。当然，如果只顾攻击，己方的位置便会遭敌人察觉，招致鱼雷反击。
这个游戏是第六研究室的大学生和研究生利用研究余暇做出来的，程序的编写与输入均以共同作业进行，可说是他们的地下毕业研究。
“有什么不对？”正晴问。
“你仔细看，这跟我们的‘submarine’有点不同。”
“嘿！”
“像这个坐标显示的方式，以及潜水艇的形状也有点不同。”
“怪了，”正晴凝神仔细观察，“是啊。”
“很奇怪吧？”
“是啊，有人改过程序了？”
“不是。”
美浓部重新启动电脑，按下放置在身旁的录音机按键，取出磁带。这部录音机不是用来听音乐，而是个人电脑的外接储存装置。虽然ibm已经发表了使用碟形磁盘的储存方式，但个人电脑的外接储存装置大多仍使用卡带。
“我把这个放进去，启动后就是刚才那样。”美浓部把卡带递给正晴。卡带上的标签只写着“marinecras”，是印刷体，不是手写的。
“‘marinecras’？这是什么？”
“三研的永田借我的。”美浓部说。三研是第三研究室的简称。
“他怎么会有这种东西？”
“因为这个。”美浓部从牛仔裤口袋里拿出车票夹，抽出一张折起的纸，看来是从杂志里剪下的。他把那张纸摊开。
各式个人电脑游戏邮购——行字映入眼帘。下面还有产品名称和该游戏的简单说明，以及售价表。产品共约三十种，价钱便宜的一千多元，昂贵的大约五千元出头。9?t
“marinecras”在表格中段，字体较粗，还附注“娱乐性★★★★”。用粗体标明的还有另外三种，但标示四颗星的只有这个，一看就知道卖方强力推荐。
从事售卖的是一家叫“无限企划”的公司，正晴既没见过也没听说过。
“这是什么？竞有人在做这种邮购业务？”
“最近有时候会看到，我没注意，不过三研的永田说他早就知道。看到这个‘marinecras’的游戏内容跟我们的‘submarine’很像，他觉得奇怪。后来，他有朋友在这里下订单买东西，他去借来看。结果就像你看到的，内容一模一样。他吓了一跳，跑来告诉我。”
“嗯……”正晴一头雾水，“这是怎么回事？”
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