TSR程序的编写及技术关键

TSR程序常驻内存,可为单任务的DOS系统增加多任务功能。本文介绍了TSR程序的编写,讨论了程序编写中的几个技术关键。     

C语言实现内存驻留程序

本文介绍了利用C语言设计TSR程序,在程字设计中采用防止TSR程序重驻留、DOS重入和热键动态安全撤离内存中驻留程序技巧,并进行原理探讨.     

DOS下的TSR程序设计技术

1.常驻程序的概念首先,我们把非常驻内存程序叫一般程序.在定义常驻程序之前,让我们先来分析一般程序在内存中的运行规律.我们在运行(RUN)一般程序时,DOS会将程序装入内存,等执行结束后,就把内存的使用权释放,供后来调入的程序使用.而常驻程序执行完后,仍然留在内存之中,而不释放所占内存的使用权,常驻内存程序也简称TSR(ter-minate and stay resident).     

如何用汇编语言编写TSR程序

TSR是DOS下常见的一个术语,TSR也是一种特殊的DOS应用程序,本文对TSR编程技术方法作一探讨并给出一个用汇编语言编程的实际例子。     

系统配署文件的设计

DOS的功能之一就是管理计算机硬件,为用户运行应用软件提供最佳的硬件环境。DOS一般按照某些参数来管理硬件环境。例如。每次启动DOS时,DOS按照某些参数把内存空间分配给DOS内部命令、DOS数据结构、设备驱动程序及其它常驻内存程序。这些参数就是系统配置默认值。DOS的设备驱动程序分为常驻和可安装设备驱动程序。常驻设备是DOS的标准设备,分为字符设备和     

TSR浅析

介绍在DOS方式下TRS的基本形式,提出使程序常驻内存的几种方法,并对常驻程序的触发及生存法则进行探索。     

微机内存剖析与使用

:内存管理是计算机操作系统中非常重要的一项功能 ,在DOS操作系统下 ,内存管理一直是令DOS用户较为头痛的问题 ;在Windows操作系统下 ,内存使用量很大 ,而内存的大小对Windows的运行性能影响是很大的 ,所以一个DOS用户或一个Windows用户深入了解内存的分布以及管理操作方法是非常重要和必要的 ,本文对此作了阐述     

TSR浅析

介绍在DOS方式下TRS的基本形式，提出使程序常驻内存的几种方法，并对常驻程序的触发及生存法则进行探索。     

微型计算机介绍(二)

存贮器部分存贮器是微型计算机的重要组成部分之一,用于保存数据和程序。存贮器根据功能分为主存贮器(Main Storage)和辅助存贮器。通常主存贮器又称内存贮器或内存(Memory),它位于主机板(Mother Board)上,用来存放当前运行的程序和数据。程序运行时首先进入内存,它存放计算或操作步骤,存放原始数据、中间结果和最终结果。内存的大小(Size)影响程序的运行,通常磁盘操作系统(Disk Operating System 简写 DOS)     

在FOXBASE 应用程序中处理DOS严重错误

本文对DOS严重错误的处理机制以及FOXBASE 系统相应的处理程序作了简要的分析,提出了在FOXBASE 应用程序中处理DOS严重错误的方法,可实现汉字提示,避免程序异常结束,从而使DOS功能与应用程序融为一体,有效地改善了FOXBASE 应用程序的用户介面。     

DOS环境中使用Windows位图

通过分析Windows环境中生成的位图文件的存储结构,以及显示位图的基本原理,给出了在DOS环境中使用位图的基本方法。最后,给出了可以直接在DOS中编译执行的、用于显示位图的C语言源程序。     

DOS环境下播放WAV语音

在DOS环境下,实现了对Windows WAV语音文件播放的程序设计。利用脉宽调制方法可使PC机的扬声器能够直接在DOS环境下播放WAV语音文件,产生的语音效果较为逼真。     

Dynamic task selection: Effects of feedback and learner control on efficiency and motivation

Structural features of learning tasks are relevant for problem solving but not salient for novice learners. Feedback in the form of Knowledge of Correct Response (KCR) during practice is expected to help learners recognize the structural features and to profit from learner control over the selection of learning tasks. A 2 × 2 factorial experiment (N = 118) was conducted to study the effects of the KCR feedback (present and absent) and control over the selection of learning tasks (learner control and program control). The presence of the KCR feedback yielded higher efficiency on a near-transfer test as well as higher learner motivation. An interaction between feedback and control, indicating extra beneficial effects of feedback when learners control the selection of learning tasks, was not found. Theoretical and practical implications are discussed.     

The Effects of Study Tasks in a Computer-Based Chemistry Learning Environment

The present study examines the effects of different study tasks on the acquisition of knowledge about acids and bases in a computer-based learning environment. Three different task formats were selected to create three treatment conditions: learning with gap-fill and matching tasks, learning with multiple-choice tasks, and learning only from text and figures without any additional tasks. Participants were 196 ninth-grade students who learned with a self-developed multimedia program in a pretest–posttest control group design. Research results reveal that gap-fill and matching tasks were most effective in promoting knowledge acquisition, followed by multiple-choice tasks, and no tasks at all. The findings are in line with previous research on this topic. The effects can possibly be explained by the generation–recognition model, which predicts that gap-fill and matching tasks trigger more encompassing learning processes than multiple-choice tasks. It is concluded that instructional designers should incorporate more challenging study tasks for enhancing the effectiveness of computer-based learning environments.     

Process support in learning tasks for acquiring complex cognitive skills in the domain of law

Whole tasks for acquiring complex skills are often too difficult for novices. To solve this problem, process support divides the problem solving into phases, offers driving questions, and provides feedback. A multimedia program was used to teach sophomore law students (N = 82) to prepare and carry out a plea. In a randomised 2 × 2 design with the factors number of phases and availability of driving questions, students solving a task with fewer phases performed better and more efficiently than students exposed to more phases. Also, students receiving driving questions performed better, although not more efficiently than students not receiving such questions. The results indicate that whole tasks should be accompanied by process support, although task characteristics might restrict the benefits of driving questions in this support.     

访问串行口的新方法

访问串行口可以有多种方法,可以用DOS功能调用,也可以用BIOS功能调用,但是DOS功能调用和BIOS功能调用在实际应用中存在一些问题,通过对串行口的硬件进行改造或直接对8250内部的接口寄存器编程,可以比较好地解决此类问题,在实际应用中能取得良好的效果,对于除了串行口接MODEM以外的其它应用,这种方法都是有效的.     

进度指示器

本文给出了在FOXPROFORDOS的应用程序中实现进度指示的方法及其具体应用     

Windows平台与DOS环境程序设计对比研究

分析和研究了Windows平台和DOS环境下应用程序设计思想方法的差异，阐述了Windows的运行机制和编程特点，并讨论了Windows平台下开发应用程序与操作系统的关系、程序驱动与运行模式等相关技术。     

基于PC机的8253实验设计

Intel 8253是典型的定时计数器芯片,有着广泛的应用。要掌握其工作原理和编程方式,实验是必不可少的环节。设计了一个新颖的基于普通PC机的8253发声程序实验。发声程序需要音调和音长两个参数。音长一般通过软件延时实现,但软件延时存在不能精确定时的问题。针对该问题提出了一种利用DOS系统功能调用获取精确音长的方法。该实验既可以独立设为实验,也可以作为基于实验箱的实验的有益补充。