80286保护地址方式下数据块传输的实现和应用

80286CPU在保护地址方式下具有高达16M字节的存储器寻址能力,通过系统BIOS功能调用可以很方便地实现保护地址方式下的数据块传输。将这一功能应用到以286微机为主机的,要求高速、大容量数据采集和多个加速单元并行处理的信号处理系统设计时,可明显地提高系统性能。作者将此方法应用于一个实际系统的设计,取得了很好的效果。

Realization and Application of Data Block Transfer in 80286 Protected Address Mode

In the protected address mode, the 80286 CPU has an extented memory addressing capability up to 16 megabytes. By calling the appropriate system BIOS functions, the data block transfer in the protected mode can be realized in a 80286 microcomputer easily. Appling this function to the design of a signal processing system based on a 80286 microcomputer as CPU, we can obtain a system which can effectively perform data acquisition with high speed and enormous volume and parallel processing with multiple DSP acceleration boards. The authors, using this method, have designed and realized successfully a DSP system which has excellent performance.