PC Hardware A Beginner’s Guide

There are 65,536 bytes available between 0000h and FFFFh. Table 13-3 does not list ev- ery possible I/O address assignment, but ...

Chapter 13: System Resources^301 device to a different I/O address. Remember that it is unusual for a PC to have even two serial ...

(^302) PC Hardware: A Beginner’s Guide Memory Addresses InadditiontoorinplaceofI/Oaddresses,manydevicesrequireablockofmemoryinth ...

DMA Operation Without DMA, data is transferred from a peripheral device, such as a modem, through the IRQ process using two sepa ...

(^304) PC Hardware: A Beginner’s Guide On some systems, the CPU must still wait for the DMA data transfer to complete and the sy ...

Chapter 13: System Resources^305 DMA Channel Common Device Other Uses 0 Memory refresh None 1 Sound card SCSI host adapter, ECP ...

(^306) PC Hardware: A Beginner’s Guide DMA mode moves one word (2 bytes or 16 bits) of data in each transfer. There have been th ...

Chapter 13: System Resources^307 Ultra DMA PIO data transfers are no longer used on newer systems, having been replaced by DMA a ...

(^308) PC Hardware: A Beginner’s Guide Plug and Pray AcommonproblemwithPCsisthatusersassumethateverythingisPlugandPlay(PnP)and t ...

Chapter 13: System Resources^309 Troubleshooting DMA Channels DMA channels are fairly straightforward to troubleshoot. A DMA dev ...

(^310) PC Hardware: A Beginner’s Guide Figure 13-17. The File System Properties dialog box ...

CHAPTER 14 Power Supply and Electrical Issues 311 Copyright 2001 The McGraw-Hill Companies, Inc. Click Here for Terms of Use. ...

(^312) PC Hardware: A Beginner’s Guide E verything in a computer runs on electricity. Even the data is just positive or negative ...

Chapter 14: Power Supply and Electrical Issues^313  Volts A volt measures the electrical pressure in a circuit. Most PC’s opera ...

(^314) PC Hardware: A Beginner’s Guide electricity, but for most technicians, a multimeter, like the one shown in Figure 14-2, a ...

Chapter 14: Power Supply and Electrical Issues^315 Switching AC to DC Electricity has two current types: AC (alternating current ...

(^316) PC Hardware: A Beginner’s Guide Elementary Electronics Now that you know something about electricity, you can move onto s ...

Chapter 14: Power Supply and Electrical Issues^317  Diode A diode, despite its two-way sounding name, is a one-way electronic v ...

(^318) PC Hardware: A Beginner’s Guide ESD Nearly all cases now produced are designed to provide some level of ESD protection, a ...

Chapter 14: Power Supply and Electrical Issues^319 Dealing with Static Electricity Static discharge can be avoided through good ...