Black Box AC249A, Быстрый старт, Страница: 8 / 20

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2. Introduction
2.1 Overview
Universal Serial Bus (USB) port technology has
emerged in response to the proliferation of external
peripheral devices that are increasingly being connected
to the latest generation of PCs: keyboards, mice,
scanners, digital cameras, removable-disk drives, etc.
USB behaves in a way similar to older buses such as the
RS-232 serial, IBM
®
PC parallel, and IBM PS/2
®
keyboard/mouse buses, but it is much faster. Also,
because it doesn’t need to be assigned any of the
computer’s IRQ (interrupt request) lines, more devices
can be attached to it, and the perennial computer-
peripheral problem of IRQ conflict is eliminated.
You can use the PS/2
→
USB Converter (product code
AC249A) to attach a PS/2 type keyboard and mouse to a
desktop, laptop, or handheld computer that uses USB
instead of the PS/2 keyboard/mouse bus. This is
especially useful for laptops, because you can attach an
external mouse and keyboard to them at the same time
without causing conflicts.