Simulating device of PS/2 keyboard

Abstract

The invention discloses a simulating device of a PS / 2 keyboard, and relates to a replacing device capable of simulating a command and information and making a corresponding response, wherein the command and the information are transmitted by a reading host computer of the PS / 2 keyboard. The simulating device comprises an integrated chip, a crystal oscillator and relevant circuits. The simulating device is characterized in that the integrated chip and the host computer are mainly operated by the following steps of: receiving data and a command which are transmitted by the host computer and making a response; and if the command is received, explaining the command and sending the response data of the command to a response buffer zone. Although the host computer using the device has no the PS / 2 keyboard, a Windows NT system still loads a driver of the PS / 2 keyboard, a scanning gun can be installed on the host computer to accomplish transmission of bar code information to the host computer.

Description

A Simulation Device of PS / 2 Keyboard technical field The invention belongs to a PS / 2 keyboard simulation replacement device, and relates to a device capable of replacing the simulated PS / 2 keyboard to read commands and information sent by the host computer, and make corresponding responses, especially a computer system using Windows NT on the host computer. When the system does not have a PS / 2 keyboard, it can automatically load the PS / 2 keyboard driver, so that the scanner with the PS / 2 interface can still obtain the applied replacement device. Background technique There are currently three types of scanners on the market: PS / 2, USB, and RS232. Because the scanner with PS / 2 interface has better advantages, many users choose this scanner first. However, if there is no PS On the WindowsNT system with / 2 keyboard, when the WindowsNT system does not detect the PS / 2 keyboard, the PS / 2 keyboard driver is not installed, and the use of the scanner with PS / 2 interface depends on t...

AI Technical Summary

Problems solved by technology

There are currently three types of scanners on the market: PS / 2, USB, and RS232. Because the scanner with PS / 2 interface has better advantages, many users choose this scanner first. However, if there is no PS On the WindowsNT system with / 2 keyboard, when the WindowsNT system does not detect the PS / 2 keyboard, the PS / 2 keyboard driver is not installed, and the use of the scanner with PS / 2 interface depends on the PS / 2 keyboard driver , without this driver, the scanner with PS / 2 interface cannot be used

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