摘要
本文从系统实现角度介绍了一个在美国DG公司MV-8000Ⅱ计算机上开发的将原来只能在图形工作站上运行的CAD系统——GRADE/G移植到普通文本终端(CD-460)的系统软件EGRADE/G。该软件的开发成功不仅使MV-8000Ⅱ在不花任何费用的情况下就扩充了众多(仿真)图形工作站,而且还为高级程序设计语言FORTRAN与GRADE/G之间建立起一套图形接口函数库。另外,本文还概要地展示了GRADE/G图形文件(.md)的内部结构,这对于MV用户利用其它高级语言开发GRADE/G系统下的CAD应用系统将有很大的帮助。
This paper describes a system software on computer MV-8000Ⅱ of DG company which transfers the existing CAD system,GRADE/G,running only on the graphics station to a new extended CAD system,EGRADE/G,running on ordinary text terminal,CD-460.With the successful software development,the computer MV-8000Ⅱ has not only expanded its numerous imitative graphics stations, but also created a graphic data base used as an interface between GRADE/G and programming language FORTRAN.In addition,the paper generally illustrates the inner structure of the GRADE/G drawing(.md)files,which will be helpfulto MV users to develop their software running under GRADE/G system.
出处
《计算机辅助工程》
1993年第1期75-78,共4页
Computer Aided Engineering
