Karbosguide.com - Module 5c2c.

About USB - continued

The contents:

  • USB Device Viewer
  • USB version 2.0
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    • USB Device Viewer

    On the Windows 98 CD-ROM look under Tools\Reskit\Diagnose. Here you find the program Usbview.exe. It reports on the present USB units.

    Here I use the USB hub sitting in the stand of the Sony F400 monitor. This hub is seen in the list as 'General purpose hub'.

    The screendump from USB Device Viewers:

    The hub controlls four units:

  • A Canon FB 630U flatbed scanner.
  • A Microsoft keyboard (USB Natural Keyboard).
  • My Philips USB-speakers.
  • A HP S20 dias scanner.

    The great thing is, that all this works together without any problems or conflicts. I can work with both scanners simultanously, each of them can be processing a job at the same time while I works with other tasks on the PC. All four units are connected to the PC with one USB cable coming from the hub in the monitor.

    Since this I have replaced the HP S20 diasscanner with a Canon FS2710 diasscanner. It is a great scanner, only it takes SCSI to work (the SCSI adapter is included). USB version 1.0 is too slow (and perhaps unstable) for high resolution scanning.

    USB version 2.0

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    A high powered version is USB 2.0. It operates with bandwidths far superior to the humble 12 Mbit/sec the existing USB has.

    USB 2.0 will offer a data transfer rate of between 360 and 480 Mbps. This makes USB 2.0 superior to the FireWire standard, which newer really became popular. This new bus also works in iso-synchronous mode like FireWire does.

    USB is great: With just one connector, all types of external units are connected to the PC. No setup of IRQ, DMA and I/O address - great. The PC will thoroughly become a modular setup of Plug And Play units!

    Links

    You find technical specifications etc. in these sites:

    Intel's USB site http://www.intel.com/design/usb

    USB sites: http://www.usb.org and http://www.usbnews.com

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    Learn more

    Read Module 6a about file systems

    Read about chip sets on the motherboard in module 2d

    Read Module 4d about super diskette and MO drives

    Read module 5a about expansion cards, where we evaluate the I/O buses from the port side

    Read module 5b about AGP

    Read module 7a about monitors, and 7b on graphics card

    Read module 7c about sound cards, and 7d on digital sound and music

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    Copyright (c) 1996-2005 by Michael B. Karbo. www.Karbosguide.com.