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SHARP PC-1500是一种便携式微型计算机。它有键盘、显示屏、打印机等I/O设备,有磁带机作外存,并配置了BASIC语言,且其计算精度可达10位有效数字,基本具备完成一般科学计算和数据处理的能力。但PC-1500又是一部很小的机器,内存仅10KB左右(也有18KB左右的)。外存操作速度也很慢,且需较多的人工干预,这就给运行较长,数据较多的程序带来了很大困难。而工资管理又是一项数据量大,处理复杂的工作。要在PC-1500上实现工资管理系统,关键是要处理好内存小,外存操作速度慢这两个问题。这方面我们做了一些探索,现介绍于后,供同行们参考。
SHARP PC-1500 is a portable microcomputer. It has keyboards, displays, printers and other I / O equipment, a tape drive for external storage, and configure the BASIC language, and its calculation accuracy of up to 10 significant figures, basically have the ability to complete general scientific computing and data processing. However, the PC-1500 is a very small machine with only about 10KB of memory (about 18KB). The operating speed of external storage is also very slow, and requires more manual intervention, which brings great difficulties to programs that run longer and have more data. And wage management is a large amount of data, dealing with complex work. To implement the payroll management system on the PC-1500, the key is to deal with two problems: small memory and slow external memory operations. We have done some explorations in this regard and are now introduced to our colleagues for reference.