upgrading and repairing PCs technicians ... - 400 Bad Request
upgrading and repairing PCs technicians ... - 400 Bad Request upgrading and repairing PCs technicians ... - 400 Bad Request
212 Chapter 8—USB and IEEE-1394 Ports and Devices The main difference is speed. Currently, IEEE-1394 offers a data transfer rate that is more than 16 times faster than that of USB 1.1, but which is less than half as fast as USB 2.0. This speed differential might change in the future as higher speed versions of IEEE-1394 debut and faster versions of USB are introduced. In the future, PCs might frequently include both USB and IEEE-1394 interfaces. Together, these two buses can replace most of the standard connections found on the back of a typical PC. USB 1.1 is clearly designed for low-speed peripherals, such as keyboards, mice, modems, and printers, whereas USB 2.0 can be used to connect most high-speed external devices. 1394 will be used to connect mostly high-performance digital video electronics products. Another important benefit of 1394 is that a PC host connection is not required. Thus, 1394 can be used to directly connect a Digital Video (DV) camcorder and a DV-VCR for dubbing tapes or editing. USB ports are standard on all recent desktop and notebook computers because Intel has added USB support to all its motherboard chipsets since 1996. However, IEEE-1394 ports must be added by means of an adapter card because the motherboard chipsets for PCs don’t support this interface. Troubleshooting IEEE-1394 Host Adapters and Devices • Host adapter is installed but doesn’t work—Make sure that your system has loaded the correct IEEE-1394 driver for the host adapter. Some host adapters don’t use the Windowsprovided TI chipset driver. • Wrong driver is installed for host adapter—If you have installed the wrong driver, remove the IEEE-1394 host adapter listing from the Windows Device Manager, have the driver CD or disk supplied with the host adapter handy, restart the system, and have the computer search for the best driver. It will find the driver on the disk or CD-ROM and install it. • Choppy video during digital editing—Use UDMA Busmastering drivers with ATA/IDE hard disks to provide smooth flow of digital video; install and enable as necessary (see Chapter 4, “SCSI and IDE Hard Drives and Optical Drives,” for details). • 4-wire devices aren’t recognized—Whereas 6-wire devices get power from the IEEE-1394 bus, 4-wire devices require their own power supply; ensure that it’s connected and turned on.
• Device “disappears” from Windows Device Manager after being connected—The connected device is probably using power management; after the device’s power management is enabled, this is normal. Use the device’s power management controls to disable power management while the device is connected to the computer. • Device displays a yellow ! in Device Manager or isn’t displayed—Windows 2000 provides support for only host adapters that support OpenHCI (OHCI). Adaptec and other brands that use non-OHCI drivers must install their own drivers to work. Update the drivers or remove the device and reinstall it, providing the correct drivers to correct the problem. IEEE-1394 and Linux Linux kernel versions 2.2 and 2.3 support IEEE-1394. To download the support files or for more information about supporting IEEE- 1394 devices under Linux, go to the following address: linux1394.sourceforge.net/index.html Online Sources for Additional IEEE-1394 Support • IEEE-1394 Products www.firewire-1394.com/ www.askfor1394.com • IEEE-1394 Trade Association www.1394ta.org IEEE-1394 213
- Page 1 and 2: Chapter 8 USB and IEEE-1394 Ports a
- Page 3 and 4: Even if your baby-AT system has con
- Page 5 and 6: Using USB Hubs with Legacy (Serial,
- Page 7: IEEE-1394 211 IEEE-1394, like USB,
- Page 12 and 13: 216 Chapter 9—Keyboards, Mice, an
- Page 14 and 15: 218 Chapter 9—Keyboards, Mice, an
- Page 16 and 17: 220 Chapter 9—Keyboards, Mice, an
- Page 18 and 19: 222 Chapter 9—Keyboards, Mice, an
- Page 20 and 21: 224 Chapter 9—Keyboards, Mice, an
- Page 22 and 23: 226 Chapter 9—Keyboards, Mice, an
- Page 24 and 25: 228 Chapter 9—Keyboards, Mice, an
- Page 26 and 27: 230 Table 9.11 Keyboard POST Codes
- Page 28 and 29: 232 Chapter 9—Keyboards, Mice, an
- Page 30 and 31: 234 Chapter 9—Keyboards, Mice, an
- Page 33 and 34: 10 Selecting a Monitor Size Table 1
- Page 35 and 36: ecent versions of Windows, starting
- Page 37 and 38: Table 10.6 Power Management Standar
- Page 39 and 40: Table 10.8 DFP Pinouts Continued Pi
- Page 41 and 42: VGA Video Display Modes 245 Table 1
- Page 43 and 44: Memory, Resolution, and Color Depth
- Page 45 and 46: Local-Bus Video Standards 249 Deter
- Page 47 and 48: Table 10.18 AGP Support by Chipset
- Page 49 and 50: Setting Up Multiple Monitor Support
- Page 51 and 52: Setting Up Multiple Monitor Support
- Page 53 and 54: Troubleshooting Video Capture Devic
- Page 55 and 56: Troubleshooting Video Capture Devic
- Page 57 and 58: Audio I/O Connectors 261 connector
212<br />
Chapter 8—USB <strong>and</strong> IEEE-1394 Ports <strong>and</strong> Devices<br />
The main difference is speed. Currently, IEEE-1394 offers a data<br />
transfer rate that is more than 16 times faster than that of USB 1.1,<br />
but which is less than half as fast as USB 2.0. This speed differential<br />
might change in the future as higher speed versions of IEEE-1394<br />
debut <strong>and</strong> faster versions of USB are introduced. In the future, <strong>PCs</strong><br />
might frequently include both USB <strong>and</strong> IEEE-1394 interfaces.<br />
Together, these two buses can replace most of the st<strong>and</strong>ard connections<br />
found on the back of a typical PC.<br />
USB 1.1 is clearly designed for low-speed peripherals, such as keyboards,<br />
mice, modems, <strong>and</strong> printers, whereas USB 2.0 can be used<br />
to connect most high-speed external devices. 1394 will be used to<br />
connect mostly high-performance digital video electronics products.<br />
Another important benefit of 1394 is that a PC host connection is<br />
not required. Thus, 1394 can be used to directly connect a Digital<br />
Video (DV) camcorder <strong>and</strong> a DV-VCR for dubbing tapes or editing.<br />
USB ports are st<strong>and</strong>ard on all recent desktop <strong>and</strong> notebook computers<br />
because Intel has added USB support to all its motherboard<br />
chipsets since 1996. However, IEEE-1394 ports must be added by<br />
means of an adapter card because the motherboard chipsets for <strong>PCs</strong><br />
don’t support this interface.<br />
Troubleshooting IEEE-1394 Host Adapters <strong>and</strong> Devices<br />
• Host adapter is installed but doesn’t work—Make sure<br />
that your system has loaded the correct IEEE-1394 driver for<br />
the host adapter. Some host adapters don’t use the Windowsprovided<br />
TI chipset driver.<br />
• Wrong driver is installed for host adapter—If you<br />
have installed the wrong driver, remove the IEEE-1394 host<br />
adapter listing from the Windows Device Manager, have the<br />
driver CD or disk supplied with the host adapter h<strong>and</strong>y,<br />
restart the system, <strong>and</strong> have the computer search for the best<br />
driver. It will find the driver on the disk or CD-ROM <strong>and</strong><br />
install it.<br />
• Choppy video during digital editing—Use UDMA Busmastering<br />
drivers with ATA/IDE hard disks to provide<br />
smooth flow of digital video; install <strong>and</strong> enable as necessary<br />
(see Chapter 4, “SCSI <strong>and</strong> IDE Hard Drives <strong>and</strong> Optical<br />
Drives,” for details).<br />
• 4-wire devices aren’t recognized—Whereas 6-wire<br />
devices get power from the IEEE-1394 bus, 4-wire devices<br />
require their own power supply; ensure that it’s connected<br />
<strong>and</strong> turned on.
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