Titlebook: MS-DOS and PC-DOS; A Practical Guide Pim Oets Textbook 1988Latest edition Pim Oets 1988 computer science.DOS.operating system

crockery

急性

牛的细微差别

Error Messages,An offence against the rules of the operating system usually results in an error message on the screen. In some cases, the message is just a warning, leaving the proceedings uninterrupted. In other cases, the message prompts us to do something — to hit a key, for instance.

INERT

Operating the Computer,ention. However, when we switch on a computer, at first nothing in particular seems to happen. After a few seconds a message may appear on the monitor screen, but tapping keys has no effect at all. Why is this?

不在灌木丛中

Files,much space is still available. In addition, we have learned the meaning of bits and bytes, kilobytes and megabytes. But how can the computer make sense out of the thousands of bytes on all those sides, tracks and sectors?

恃强凌弱

Characters and Symbols,specific coding system, before the CPU (see page 13) can do anything with them. Such a system consisting of no more than two values is called a binary system. In the binary system, the numeral 2 is represented by 10, 3 by 11, 4 by 100, 5 by 101, 6 by 110, 7 by 111, 8 by 1000, 9 by 1001, 10 by 1010, etc.

流行

Using a Hard Disk,part of the computer, as in IBM’s PC XT, but it could also be added later. In that case there are three possibilities: external, in a special box, or internal, instead of a floppy disk drive, or in the form of a special card to be inserted in the slots in the system cabinet specially designed.

fixed-joint

Streamlining the System,ystem to be at our service. And indeed, it is. It provides various gadgets and devices to carry out all kinds of daily routine jobs in a fixed order without a problem. This chapter deals with some of these routine actions.

谆谆教诲

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