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<!DOCTYPE doctype PUBLIC "-//w3c//dtd html 4.0 transitional//en">
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<meta name="GENERATOR" content="Mozilla/4.7 [en] (Win98; U) [Netscape]">
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<meta name="Author" content="Adam Chapweske">
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<title>PS/2 Mouse Interfacing</title>
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<!--This file created 10:20 PM 3/29/01 by Claris Home Page version 3.0-->
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</head><body vlink="#3333ff" alink="#3333ff" bgcolor="#ffffff" link="#3333ff">
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<small><b><font face="Arial,Helvetica"><font size="+3"><small>The PS/2
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Mouse Interface</small></font></font></b></small><br>
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<center></center>
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<center>
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<hr size="1" width="400" align="left" noshade="noshade"></center>
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<br>
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<font face="Arial,Helvetica">Source: <a href="http://www.computer-engineering.org/">http://www.Computer-Engineering.org</a></font><br>
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<font face="Arial,Helvetica">Author: Adam Chapweske<br>
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Last Updated: 04/01/03<br>
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<br>
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<br>
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</font><b>Legal Information:</b><br>
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<br>
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All information within this article is provided "as is" and without any
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express or implied warranties, including, without limitation, the implied
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warranties of merchantibility and fitness for a particular purpose. <br>
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<br>
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This article is protected under copyright law. This document may
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be copied only if the source, author, date, and legal information is included.<br>
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<br>
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<b>Abstract:</b><br>
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<br>
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This article attempts to explain every aspect of the PS/2 mouse interface
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including the physical and electrical interface, low-level protocol, modes
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of operation, commands, and extensions. All code samples involving
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the mouse encoder are written in assembly for <a href="http://www.microchip.com/">Microchip's</a> PIC microcontrollers.
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All code samples related to the auxiliary device controller (keyboard
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controller) are written in x86 assembly<br>
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<br>
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<b>General Description:</b><br>
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<br>
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There are many types of pointing devices available for modern PCs, including
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mice, trackballs, touchpads, electronic whiteboards, etc. Virtually
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all of these pointing devices communicate with a computer using one of two
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interfaces: Universal Serial Bus (USB) or the PS/2 Mouse Interface. See
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the following table for a comparison:<br>
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<blockquote>
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<table width="500" border="1" cellpadding="2" cellspacing="0">
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<tbody>
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<tr>
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<td valign="top" width="33%" align="center"><br>
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</td>
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<td valign="top" width="33%" align="center"><b>USB (v1.1)</b><br>
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</td>
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<td valign="top" align="center"><b> PS/2 Mouse Interface
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</b><br>
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</td>
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</tr>
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<tr>
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<td valign="top" width="33%" align="center">Number of Devices
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Supported<br>
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</td>
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<td valign="top" width="33%" align="center">Up to 127<br>
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</td>
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<td valign="top" align="center">One<br>
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</td>
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</tr>
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<tr>
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<td valign="top" width="33%" align="center">Maximum Data Rate<br>
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</td>
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<td valign="top" width="33%" align="center">12 Mbps<br>
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</td>
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<td valign="top" align="center">40 kbps<br>
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</td>
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</tr>
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<tr>
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<td valign="top" width="33%" align="center">Power (max)<br>
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</td>
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<td valign="top" width="33%" align="center">5V @ 500mA<br>
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</td>
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<td valign="top" align="center">5V @ 100mA<br>
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</td>
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</tr>
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<tr>
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<td valign="top" width="33%" align="center">Hot-Pluggable?<br>
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</td>
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<td valign="top" width="33%" align="center">Yes<br>
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</td>
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<td valign="top" align="center">No<br>
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</td>
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</tr>
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<tr>
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<td valign="top" width="33%" align="center">Documentation<br>
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</td>
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<td valign="top" width="33%" align="center">Well-documented: <a href="http://www.usb.org/">http://www.usb.org</a><br>
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</td>
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<td valign="top" align="center">Out-of-print <br>
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(IBM Tech Reference)<br>
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</td>
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</tr>
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</tbody>
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</table>
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<br>
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</blockquote>
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Older pointing device interfaces include the Apple Desktop Bus (ADB),
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RS-232 serial port, and the bus mouse interface. These are obsolete
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and are not covered in this article.<br>
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<br>
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The PS/2 mouse interface originally appeared in IBM's "Personal System/2"
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computers in the late 80's. It still remains a widely-supported interface
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for the sake of constantly maintaining backward compatibility. However,
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USB has quickly caught on these last few years and will eventually replace
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the PS/2 mouse interface entirely.<br>
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<br>
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The PS/2 mouse interface uses a bidirectional serial protocol to transmit
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movement and button-position data to the computer's auxiliary device controller
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(keyboard controller). The computer, in turn, may send a number of
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commands to the mouse to set the report rate, resolution, reset the mouse,
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disable the mouse, etc. The computer also provides the mouse with an
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overload-protected 5V power supply.<br>
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<p><b>Electrical Interface / Protocol:</b> </p>
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<p>The PS/2 mouse uses the same protocol as the PS/2 keyboard (aka AT keyboard).
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Click <a href="http://www.computer-engineering.org/ps2protocol">here</a> for detailed information on this
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protocol. </p>
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<p><b>Inputs, Resolution, and Scaling:</b> </p>
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<p>The standard PS/2 mouse interface supports the following inputs: X (right/left)
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movement, Y (up/down) movement, left button, middle button, and right button.
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The mouse reads these inputs at a regular freqency and updates various
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counters and flags to reflect movement and button states. There are
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many PS/2 pointing devices that have additional inputs and may report data
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differently than described in this document. One popular extension
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I cover later in this document is the Microsoft Intellimouse, which includes
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support for the standard inputs as well as a scrolling wheel and two additional
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buttons. </p>
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<p>The standard mouse has two counters that keep track of movement: the X-movement
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counter and the Y-movement counter. These are 9-bit 2's complement
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values and each has an associated overflow flag. Their contents, along
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with the state of the three mouse buttons, are sent to the host in the form
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of a 3-byte movement data packet (as described in the next section.)
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The movement counters represent the amount of movement that has occurred
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since the last movment data packet was sent to the host (ie, they do not
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represent absolute positions.) </p>
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<p>When the mouse reads its inputs, it records the current state of its buttons
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and checks for movement. If movement has occurred it increments (for +X
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or +Y movement) or decrements (for -X or -Y movement) its X and/or Y movement
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counters. If either of the counters has overflowed, it sets the appropriate
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overflow flag. </p>
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<p>The parameter that determines the amount by which the movement counters
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are incremented/decremented is the <i>resolution</i>. The default resolution
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is 4 counts/mm and the host may change that value using the "Set Resolution"
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(0xE8) command. </p>
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<p>There is a parameter that does not effect the movement counters, but does
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effect the reported<a href="#Footnotes">(1)</a> value of these counters.
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This parameter is <i>scaling</i>. By default, the mouse uses 1:1
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scaling, which has no effect on the reported mouse movement. However,
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the host may select 2:1 scaling by sending the "Set Scaling 2:1" (0xE7)
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command. If 2:1 scaling is enabled, the mouse will apply the following
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algorithm to the counters before sending their contents to the host: <br>
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</p>
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<blockquote>
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<table width="300" border="1" cellpadding="2" cellspacing="0">
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<tbody>
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<tr>
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<td valign="top" align="center">Movement Counter<br>
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</td>
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<td valign="top" align="center">Reported Movement<br>
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</td>
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</tr>
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<tr>
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<td valign="top" align="center">0<br>
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</td>
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<td valign="top" align="center">0<br>
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</td>
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</tr>
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<tr>
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<td valign="top" align="center">1<br>
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</td>
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<td valign="top" align="center">1<br>
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</td>
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</tr>
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<tr>
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<td valign="top" align="center">2<br>
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</td>
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<td valign="top" align="center">1<br>
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</td>
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</tr>
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<tr>
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<td valign="top" align="center">3<br>
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</td>
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<td valign="top" align="center">3<br>
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</td>
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</tr>
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<tr>
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<td valign="top" align="center">4<br>
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</td>
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<td valign="top" align="center">6<br>
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</td>
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</tr>
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<tr>
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<td valign="top" align="center">5<br>
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</td>
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<td valign="top" align="center">9<br>
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</td>
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</tr>
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<tr>
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<td valign="top" align="center">N > 5<br>
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</td>
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<td valign="top" align="center">2 * N<br>
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</td>
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</tr>
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</tbody>
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</table>
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</blockquote>
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<center>
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<div align="center"> </div>
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</center>
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<center></center>
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<center>
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<div align="center"> </div>
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</center>
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<p><b><br>
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Movement Data Packet:</b> </p>
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<p>The standard PS/2 mouse sends movement/button information to the host
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using the following 3-byte packet <a href="#Footnotes">(4)</a>:
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</p>
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<blockquote>
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<table width="650" border="0" cellpadding="0" cellspacing="0">
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<tbody>
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<tr>
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<td> <br>
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<font face="Arial,Helvetica"><font size="-1">Byte 1 </font></font></td>
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<td>
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<table width="100%" border="0" cellpadding="0" cols="8">
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<tbody>
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<tr>
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<td>
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<center>Bit 7</center>
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</td>
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<td>
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<center>Bit 6</center>
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</td>
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<td>
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<center>Bit 5</center>
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</td>
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<td>
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<center>Bit 4</center>
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</td>
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<td>
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<center>Bit 3</center>
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</td>
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<td>
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<center>Bit 2</center>
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</td>
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<td>
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<center>Bit 1</center>
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</td>
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<td>
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<center>Bit 0</center>
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</td>
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</tr>
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</tbody>
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</table>
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<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="8">
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<tbody>
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<tr>
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<td>
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<center><font face="Arial,Helvetica"><font size="-1">Y overflow</font></font></center>
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</td>
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<td>
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<center><font face="Arial,Helvetica"><font size="-1">X overflow</font></font></center>
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</td>
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<td>
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<center><font face="Arial,Helvetica"><font size="-1">Y sign
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bit</font></font></center>
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</td>
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<td>
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<center><font face="Arial,Helvetica"><font size="-1">X sign
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bit</font></font></center>
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</td>
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|
<td>
|
| 350 |
|
|
|
| 351 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Always
|
| 352 |
|
|
1</font></font></center>
|
| 353 |
|
|
</td>
|
| 354 |
|
|
<td>
|
| 355 |
|
|
|
| 356 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Middle
|
| 357 |
|
|
Btn</font></font></center>
|
| 358 |
|
|
</td>
|
| 359 |
|
|
<td>
|
| 360 |
|
|
|
| 361 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Right
|
| 362 |
|
|
Btn</font></font></center>
|
| 363 |
|
|
|
| 364 |
|
|
</td>
|
| 365 |
|
|
<td>
|
| 366 |
|
|
|
| 367 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Left
|
| 368 |
|
|
Btn</font></font></center>
|
| 369 |
|
|
</td>
|
| 370 |
|
|
</tr>
|
| 371 |
|
|
|
| 372 |
|
|
</tbody>
|
| 373 |
|
|
|
| 374 |
|
|
</table>
|
| 375 |
|
|
</td>
|
| 376 |
|
|
</tr>
|
| 377 |
|
|
|
| 378 |
|
|
<tr>
|
| 379 |
|
|
<td><font face="Arial,Helvetica"><font size="-1">Byte 2</font></font></td>
|
| 380 |
|
|
<td>
|
| 381 |
|
|
<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="1">
|
| 382 |
|
|
<tbody>
|
| 383 |
|
|
<tr>
|
| 384 |
|
|
<td>
|
| 385 |
|
|
|
| 386 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">X Movement</font></font></center>
|
| 387 |
|
|
</td>
|
| 388 |
|
|
|
| 389 |
|
|
</tr>
|
| 390 |
|
|
|
| 391 |
|
|
</tbody>
|
| 392 |
|
|
|
| 393 |
|
|
</table>
|
| 394 |
|
|
</td>
|
| 395 |
|
|
</tr>
|
| 396 |
|
|
<tr>
|
| 397 |
|
|
<td><font face="Arial,Helvetica"><font size="-1">Byte 3 </font></font></td>
|
| 398 |
|
|
<td>
|
| 399 |
|
|
<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="1">
|
| 400 |
|
|
|
| 401 |
|
|
<tbody>
|
| 402 |
|
|
<tr>
|
| 403 |
|
|
<td>
|
| 404 |
|
|
|
| 405 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Y Movement</font></font></center>
|
| 406 |
|
|
</td>
|
| 407 |
|
|
</tr>
|
| 408 |
|
|
|
| 409 |
|
|
</tbody>
|
| 410 |
|
|
|
| 411 |
|
|
</table>
|
| 412 |
|
|
</td>
|
| 413 |
|
|
|
| 414 |
|
|
</tr>
|
| 415 |
|
|
|
| 416 |
|
|
</tbody>
|
| 417 |
|
|
</table>
|
| 418 |
|
|
</blockquote>
|
| 419 |
|
|
The movement counters are 9-bit 2's complement integers, where the
|
| 420 |
|
|
most significant bit appears as a sign bit in Byte 1 of the movement data
|
| 421 |
|
|
packet. These counters are updated when the mouse reads its input and finds
|
| 422 |
|
|
movement has occurred. Their value is the amount of movement that has occurred
|
| 423 |
|
|
since the last movement data packet was sent to the host (ie, after a packet
|
| 424 |
|
|
is sent to the host, the movement counters are reset.) The range of values
|
| 425 |
|
|
that can be expressed by the movement counters is -255 to +255. If this
|
| 426 |
|
|
range is exceeded, the appropriate overflow bit is set.
|
| 427 |
|
|
<p>As I mentioned earlier, the movement counters are reset whenever a movement
|
| 428 |
|
|
data packet is successfully sent to the host. They are also reset after
|
| 429 |
|
|
the mouse receives any command from the host other than the "Resend" (0xFE)
|
| 430 |
|
|
command. </p>
|
| 431 |
|
|
|
| 432 |
|
|
<p><b>Modes of Operation:</b> </p>
|
| 433 |
|
|
|
| 434 |
|
|
<p>Data reporting is handled according to the mode in which the mouse is
|
| 435 |
|
|
operating. There are four standard modes of operation: </p>
|
| 436 |
|
|
|
| 437 |
|
|
|
| 438 |
|
|
<ul>
|
| 439 |
|
|
<li> <i>Reset</i> - The mouse enters Reset mode at power-up or after
|
| 440 |
|
|
receiving the "Reset" (0xFF) command. </li>
|
| 441 |
|
|
<li> <i>Stream</i> - This is the default mode (after Reset finishes
|
| 442 |
|
|
executing) and is the mode in which most software uses the mouse.
|
| 443 |
|
|
If the host has previously set the mouse to Remote mode, it may re-enter
|
| 444 |
|
|
Stream mode by sending the "Set Stream Mode" (0xEA) command to the mouse. </li>
|
| 445 |
|
|
<li> <i>Remote</i> - Remote mode is useful in some situations and may
|
| 446 |
|
|
be entered by sending the "Set Remote Mode" (0xF0) command to the mouse. </li>
|
| 447 |
|
|
|
| 448 |
|
|
<li> <i>Wrap</i> - This mode isn't particularly useful except for testing
|
| 449 |
|
|
the connection between the mouse and its host. Wrap mode may be entered
|
| 450 |
|
|
by sending the "Set Wrap Mode" (0xEE) command to the mouse. To exit
|
| 451 |
|
|
Wrap mode, the host must issue the "Reset" (0xFF) command or "Reset Wrap
|
| 452 |
|
|
Mode" (0xEC) command. If the "Reset" (0xFF) command is recieved,
|
| 453 |
|
|
the mouse will enter Reset mode. If the "Reset Wrap Mode" (0xEC)
|
| 454 |
|
|
command is received, the mouse will enter the mode it was in prior to Wrap
|
| 455 |
|
|
Mode.</li>
|
| 456 |
|
|
|
| 457 |
|
|
</ul>
|
| 458 |
|
|
(Note: The mouse may also enter "extended" modes of operation, as described
|
| 459 |
|
|
later in this document. However, this is not a feature of the standard
|
| 460 |
|
|
PS/2 mouse.)
|
| 461 |
|
|
|
| 462 |
|
|
<p><b>Reset Mode:</b> </p>
|
| 463 |
|
|
|
| 464 |
|
|
<p>The mouse enters reset mode at power-on or in response to the "Reset"
|
| 465 |
|
|
(0xFF) command. After entring this mode, the mouse performs a diagnostic
|
| 466 |
|
|
self-test referred to as BAT (Basic Assurance Test) and sets the following
|
| 467 |
|
|
default values: </p>
|
| 468 |
|
|
|
| 469 |
|
|
<ul>
|
| 470 |
|
|
<li> Sample Rate = 100 samples/sec</li>
|
| 471 |
|
|
<li> Resolution = 4 counts/mm</li>
|
| 472 |
|
|
<li> Scaling = 1:1</li>
|
| 473 |
|
|
|
| 474 |
|
|
<li> Data Reporting Disabled</li>
|
| 475 |
|
|
|
| 476 |
|
|
</ul>
|
| 477 |
|
|
It then sends a BAT completion code of either AAh (BAT successful)
|
| 478 |
|
|
or FCh (Error). The host's response to a completion code other than AAh
|
| 479 |
|
|
is undefined.
|
| 480 |
|
|
<p>Following the BAT completion code (AAh or FCh), the mouse sends its device
|
| 481 |
|
|
ID of 00h. This distinguishes it from a keyboard, or a mouse in an extended
|
| 482 |
|
|
mode. I have read documents saything the host is not <i>supposed</i> to
|
| 483 |
|
|
transmit any data until it receives a device ID. However I've found
|
| 484 |
|
|
that some BIOS's will send the "Reset" command immediately following the
|
| 485 |
|
|
0xAA received after a power-on reset. </p>
|
| 486 |
|
|
|
| 487 |
|
|
<p>After the mouse has sent its device ID to the host, it will enter Stream
|
| 488 |
|
|
Mode. Note that one of the default values set by the mouse is "Data
|
| 489 |
|
|
Reporting Disabled". This means the mouse will not issue any movement
|
| 490 |
|
|
data packets until it receives the "Enable Data Reporting" command. </p>
|
| 491 |
|
|
|
| 492 |
|
|
|
| 493 |
|
|
<p><b>Stream Mode:</b> </p>
|
| 494 |
|
|
|
| 495 |
|
|
<p>In stream mode, the mouse sends movement data when it detects movement
|
| 496 |
|
|
or a change in state of one or more mouse buttons. The maximum rate at
|
| 497 |
|
|
which this data reporting may occur is known as the <i>sample rate</i>.
|
| 498 |
|
|
This parameter ranges from 10 samples/sec to 200 samples/sec. Its default
|
| 499 |
|
|
value is 100 samples/sec and the host may change that value by using the
|
| 500 |
|
|
"Set Sample Rate" command. Stream mode is the default mode of operation
|
| 501 |
|
|
following reset. </p>
|
| 502 |
|
|
|
| 503 |
|
|
<p><b>Remote Mode:</b> </p>
|
| 504 |
|
|
|
| 505 |
|
|
|
| 506 |
|
|
<p>In this mode the mouse reads its inputs and updates its counters/flags
|
| 507 |
|
|
at the current sample rate, but it does not automatically issue data packets
|
| 508 |
|
|
when movement has occured. Instead, the host must poll the mouse using
|
| 509 |
|
|
the "Read Data" command. Upon receiving this command the mouse will
|
| 510 |
|
|
send a single movement data packet and reset its movement counters.</p>
|
| 511 |
|
|
|
| 512 |
|
|
<p> </p>
|
| 513 |
|
|
|
| 514 |
|
|
<p><b>Wrap Mode:</b> </p>
|
| 515 |
|
|
|
| 516 |
|
|
<p>This is an "echoing" mode in which every byte received by the mouse is
|
| 517 |
|
|
sent back to the host. Even if the byte represents a valid command, the
|
| 518 |
|
|
mouse will not respond to that command--it will only echo that byte back
|
| 519 |
|
|
to the host. There are two exceptions to this: the "Reset" command and "Reset
|
| 520 |
|
|
Wrap Mode" command. The mouse treats these as valid commands and does not
|
| 521 |
|
|
echo them back to the host. </p>
|
| 522 |
|
|
|
| 523 |
|
|
<p><b>Intellimouse Extensions:</b> </p>
|
| 524 |
|
|
|
| 525 |
|
|
|
| 526 |
|
|
<p>A popular extension to the standard PS/2 mouse is the Microsoft Intellimouse.
|
| 527 |
|
|
This includes support for a total of five mouse buttons and three axises
|
| 528 |
|
|
of movement (right-left, up-down, and a scrolling wheel). These additional
|
| 529 |
|
|
features require the use of a 4-byte movement data packet rather than the
|
| 530 |
|
|
standard 3-byte packet. Since standard PS/2 mouse drivers cannot
|
| 531 |
|
|
recognize this packet format, the Microsoft Intellimouse is required to
|
| 532 |
|
|
operate exactly like a standard PS/2 mouse unless it knows the drivers
|
| 533 |
|
|
support the extended packet format. This way, if a Microsoft Intellimouse
|
| 534 |
|
|
is used on a computer which only supports the standard PS/2 mouse, the
|
| 535 |
|
|
Microsoft Intellimouse will still function, except for its scrolling wheel
|
| 536 |
|
|
and 4th and 5th buttons. </p>
|
| 537 |
|
|
|
| 538 |
|
|
<p>After power-on or reset the Microsoft Intellimouse operates just like
|
| 539 |
|
|
a standard PS/2 mouse (ie, it uses a 3-byte movement data packet, responds
|
| 540 |
|
|
to all commands in the same way as a standard PS/2 mouse, and reports a
|
| 541 |
|
|
device ID of 00h.) To enter "scrolling wheel" mode, the host sends
|
| 542 |
|
|
the following command sequence: </p>
|
| 543 |
|
|
|
| 544 |
|
|
|
| 545 |
|
|
<blockquote>Set sample rate 200 <br>
|
| 546 |
|
|
Set sample rate 100 <br>
|
| 547 |
|
|
Set sample rate 80</blockquote>
|
| 548 |
|
|
The host then issues the "Get device ID" command and waits for a response.
|
| 549 |
|
|
If a standard PS/2 mouse (ie, non-Intellimouse) is attached, it will respond
|
| 550 |
|
|
with a device ID of 00h. In this case, the host will recognize the
|
| 551 |
|
|
fact that the mouse does have a scrolling wheel and will continue to treat
|
| 552 |
|
|
it as a standard PS/2 mouse. However, if a Microsoft Intellimouse
|
| 553 |
|
|
is attached, it will respond with an ID of 03h. This tells the host
|
| 554 |
|
|
that the attached pointing device has a scrolling wheel and the host will
|
| 555 |
|
|
then expect the mouse to use the following 4-byte movement data packet:
|
| 556 |
|
|
|
| 557 |
|
|
|
| 558 |
|
|
<blockquote>
|
| 559 |
|
|
<table width="650" border="0" cellpadding="0" cellspacing="0">
|
| 560 |
|
|
<tbody>
|
| 561 |
|
|
<tr>
|
| 562 |
|
|
<td> <br>
|
| 563 |
|
|
<font face="Arial,Helvetica"><font size="-1">Byte 1 </font></font></td>
|
| 564 |
|
|
<td>
|
| 565 |
|
|
<table width="100%" border="0" cellpadding="0" cols="8">
|
| 566 |
|
|
<tbody>
|
| 567 |
|
|
|
| 568 |
|
|
<tr>
|
| 569 |
|
|
<td>
|
| 570 |
|
|
|
| 571 |
|
|
<center>Bit 7</center>
|
| 572 |
|
|
</td>
|
| 573 |
|
|
<td>
|
| 574 |
|
|
|
| 575 |
|
|
<center>Bit 6</center>
|
| 576 |
|
|
</td>
|
| 577 |
|
|
<td>
|
| 578 |
|
|
|
| 579 |
|
|
<center>Bit 5</center>
|
| 580 |
|
|
|
| 581 |
|
|
</td>
|
| 582 |
|
|
<td>
|
| 583 |
|
|
|
| 584 |
|
|
<center>Bit 4</center>
|
| 585 |
|
|
</td>
|
| 586 |
|
|
<td>
|
| 587 |
|
|
|
| 588 |
|
|
<center>Bit 3</center>
|
| 589 |
|
|
</td>
|
| 590 |
|
|
<td>
|
| 591 |
|
|
|
| 592 |
|
|
<center>Bit 2</center>
|
| 593 |
|
|
|
| 594 |
|
|
</td>
|
| 595 |
|
|
<td>
|
| 596 |
|
|
|
| 597 |
|
|
<center>Bit 1</center>
|
| 598 |
|
|
</td>
|
| 599 |
|
|
<td>
|
| 600 |
|
|
|
| 601 |
|
|
<center>Bit 0</center>
|
| 602 |
|
|
</td>
|
| 603 |
|
|
</tr>
|
| 604 |
|
|
|
| 605 |
|
|
</tbody>
|
| 606 |
|
|
|
| 607 |
|
|
</table>
|
| 608 |
|
|
|
| 609 |
|
|
|
| 610 |
|
|
<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="8">
|
| 611 |
|
|
<tbody>
|
| 612 |
|
|
<tr>
|
| 613 |
|
|
<td>
|
| 614 |
|
|
|
| 615 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Y overflow</font></font></center>
|
| 616 |
|
|
</td>
|
| 617 |
|
|
<td>
|
| 618 |
|
|
|
| 619 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">X overflow</font></font></center>
|
| 620 |
|
|
</td>
|
| 621 |
|
|
|
| 622 |
|
|
<td>
|
| 623 |
|
|
|
| 624 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Y sign
|
| 625 |
|
|
bit</font></font></center>
|
| 626 |
|
|
</td>
|
| 627 |
|
|
<td>
|
| 628 |
|
|
|
| 629 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">X sign
|
| 630 |
|
|
bit</font></font></center>
|
| 631 |
|
|
</td>
|
| 632 |
|
|
<td>
|
| 633 |
|
|
|
| 634 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Always
|
| 635 |
|
|
1</font></font></center>
|
| 636 |
|
|
</td>
|
| 637 |
|
|
|
| 638 |
|
|
<td>
|
| 639 |
|
|
|
| 640 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Middle
|
| 641 |
|
|
Btn</font></font></center>
|
| 642 |
|
|
</td>
|
| 643 |
|
|
<td>
|
| 644 |
|
|
|
| 645 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Right
|
| 646 |
|
|
Btn</font></font></center>
|
| 647 |
|
|
</td>
|
| 648 |
|
|
<td>
|
| 649 |
|
|
|
| 650 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Left
|
| 651 |
|
|
Btn</font></font></center>
|
| 652 |
|
|
</td>
|
| 653 |
|
|
|
| 654 |
|
|
</tr>
|
| 655 |
|
|
|
| 656 |
|
|
</tbody>
|
| 657 |
|
|
|
| 658 |
|
|
</table>
|
| 659 |
|
|
</td>
|
| 660 |
|
|
</tr>
|
| 661 |
|
|
<tr>
|
| 662 |
|
|
<td><font face="Arial,Helvetica"><font size="-1">Byte 2</font></font></td>
|
| 663 |
|
|
<td>
|
| 664 |
|
|
<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="1">
|
| 665 |
|
|
|
| 666 |
|
|
<tbody>
|
| 667 |
|
|
<tr>
|
| 668 |
|
|
<td>
|
| 669 |
|
|
|
| 670 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">X Movement</font></font></center>
|
| 671 |
|
|
</td>
|
| 672 |
|
|
</tr>
|
| 673 |
|
|
|
| 674 |
|
|
</tbody>
|
| 675 |
|
|
|
| 676 |
|
|
</table>
|
| 677 |
|
|
</td>
|
| 678 |
|
|
|
| 679 |
|
|
</tr>
|
| 680 |
|
|
<tr>
|
| 681 |
|
|
<td><font face="Arial,Helvetica"><font size="-1">Byte 3 </font></font></td>
|
| 682 |
|
|
<td>
|
| 683 |
|
|
<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="1">
|
| 684 |
|
|
<tbody>
|
| 685 |
|
|
<tr>
|
| 686 |
|
|
<td>
|
| 687 |
|
|
|
| 688 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Y Movement</font></font></center>
|
| 689 |
|
|
|
| 690 |
|
|
</td>
|
| 691 |
|
|
</tr>
|
| 692 |
|
|
|
| 693 |
|
|
</tbody>
|
| 694 |
|
|
|
| 695 |
|
|
</table>
|
| 696 |
|
|
</td>
|
| 697 |
|
|
</tr>
|
| 698 |
|
|
<tr>
|
| 699 |
|
|
<td><font face="Arial,Helvetica"><font size="-1">Byte 4</font></font></td>
|
| 700 |
|
|
<td>
|
| 701 |
|
|
<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="1">
|
| 702 |
|
|
|
| 703 |
|
|
<tbody>
|
| 704 |
|
|
<tr>
|
| 705 |
|
|
<td>
|
| 706 |
|
|
|
| 707 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Z Movement</font></font></center>
|
| 708 |
|
|
</td>
|
| 709 |
|
|
</tr>
|
| 710 |
|
|
|
| 711 |
|
|
</tbody>
|
| 712 |
|
|
|
| 713 |
|
|
</table>
|
| 714 |
|
|
</td>
|
| 715 |
|
|
|
| 716 |
|
|
</tr>
|
| 717 |
|
|
|
| 718 |
|
|
</tbody>
|
| 719 |
|
|
</table>
|
| 720 |
|
|
Z Movement is a 2's complement number that represents the scrolling
|
| 721 |
|
|
wheel's movement since the last data report. Valid values are in the
|
| 722 |
|
|
range of -8 to +7. This means the number is actually represented only by
|
| 723 |
|
|
the least significant four bits; the upper four bits act only as sign extension
|
| 724 |
|
|
bits.</blockquote>
|
| 725 |
|
|
To enter "scrolling wheel + 5 button" mode, the host sends the following
|
| 726 |
|
|
command sequence:
|
| 727 |
|
|
<blockquote>Set sample rate 200 <br>
|
| 728 |
|
|
Set sample rate 200 <br>
|
| 729 |
|
|
|
| 730 |
|
|
Set sample rate 80</blockquote>
|
| 731 |
|
|
The host then issues the "Get device ID" command and waits for a response.
|
| 732 |
|
|
A Microsoft Intellimouse will respond with a device ID of 04h, then use
|
| 733 |
|
|
the following 4-byte movement data packet:
|
| 734 |
|
|
<blockquote>
|
| 735 |
|
|
<blockquote>
|
| 736 |
|
|
<table width="650" border="0" cellpadding="0" cellspacing="0">
|
| 737 |
|
|
<tbody>
|
| 738 |
|
|
<tr>
|
| 739 |
|
|
<td> <br>
|
| 740 |
|
|
|
| 741 |
|
|
<font face="Arial,Helvetica"><font size="-1">Byte 1 </font></font></td>
|
| 742 |
|
|
<td>
|
| 743 |
|
|
|
| 744 |
|
|
<table width="100%" border="0" cellpadding="0" cols="8">
|
| 745 |
|
|
<tbody>
|
| 746 |
|
|
<tr>
|
| 747 |
|
|
<td>
|
| 748 |
|
|
|
| 749 |
|
|
<center>Bit 7</center>
|
| 750 |
|
|
</td>
|
| 751 |
|
|
<td>
|
| 752 |
|
|
|
| 753 |
|
|
<center>Bit 6</center>
|
| 754 |
|
|
|
| 755 |
|
|
</td>
|
| 756 |
|
|
<td>
|
| 757 |
|
|
|
| 758 |
|
|
<center>Bit 5</center>
|
| 759 |
|
|
</td>
|
| 760 |
|
|
<td>
|
| 761 |
|
|
|
| 762 |
|
|
<center>Bit 4</center>
|
| 763 |
|
|
</td>
|
| 764 |
|
|
<td>
|
| 765 |
|
|
|
| 766 |
|
|
<center>Bit 3</center>
|
| 767 |
|
|
|
| 768 |
|
|
</td>
|
| 769 |
|
|
<td>
|
| 770 |
|
|
|
| 771 |
|
|
<center>Bit 2</center>
|
| 772 |
|
|
</td>
|
| 773 |
|
|
<td>
|
| 774 |
|
|
|
| 775 |
|
|
<center>Bit 1</center>
|
| 776 |
|
|
</td>
|
| 777 |
|
|
<td>
|
| 778 |
|
|
|
| 779 |
|
|
<center>Bit 0</center>
|
| 780 |
|
|
|
| 781 |
|
|
</td>
|
| 782 |
|
|
</tr>
|
| 783 |
|
|
|
| 784 |
|
|
|
| 785 |
|
|
</tbody>
|
| 786 |
|
|
|
| 787 |
|
|
</table>
|
| 788 |
|
|
|
| 789 |
|
|
|
| 790 |
|
|
<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="8">
|
| 791 |
|
|
<tbody>
|
| 792 |
|
|
<tr>
|
| 793 |
|
|
<td>
|
| 794 |
|
|
|
| 795 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Y overflow</font></font></center>
|
| 796 |
|
|
|
| 797 |
|
|
</td>
|
| 798 |
|
|
<td>
|
| 799 |
|
|
|
| 800 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">X overflow</font></font></center>
|
| 801 |
|
|
</td>
|
| 802 |
|
|
<td>
|
| 803 |
|
|
|
| 804 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Y sign
|
| 805 |
|
|
bit</font></font></center>
|
| 806 |
|
|
</td>
|
| 807 |
|
|
<td>
|
| 808 |
|
|
|
| 809 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">X sign
|
| 810 |
|
|
bit</font></font></center>
|
| 811 |
|
|
|
| 812 |
|
|
</td>
|
| 813 |
|
|
<td>
|
| 814 |
|
|
|
| 815 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Always
|
| 816 |
|
|
1</font></font></center>
|
| 817 |
|
|
</td>
|
| 818 |
|
|
<td>
|
| 819 |
|
|
|
| 820 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Middle
|
| 821 |
|
|
Btn</font></font></center>
|
| 822 |
|
|
</td>
|
| 823 |
|
|
<td>
|
| 824 |
|
|
|
| 825 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Right
|
| 826 |
|
|
Btn</font></font></center>
|
| 827 |
|
|
|
| 828 |
|
|
</td>
|
| 829 |
|
|
<td>
|
| 830 |
|
|
|
| 831 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Left
|
| 832 |
|
|
Btn</font></font></center>
|
| 833 |
|
|
</td>
|
| 834 |
|
|
</tr>
|
| 835 |
|
|
|
| 836 |
|
|
|
| 837 |
|
|
</tbody>
|
| 838 |
|
|
|
| 839 |
|
|
</table>
|
| 840 |
|
|
</td>
|
| 841 |
|
|
</tr>
|
| 842 |
|
|
|
| 843 |
|
|
<tr>
|
| 844 |
|
|
<td><font face="Arial,Helvetica"><font size="-1">Byte 2</font></font></td>
|
| 845 |
|
|
<td>
|
| 846 |
|
|
|
| 847 |
|
|
<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="1">
|
| 848 |
|
|
<tbody>
|
| 849 |
|
|
<tr>
|
| 850 |
|
|
<td>
|
| 851 |
|
|
|
| 852 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">X Movement</font></font></center>
|
| 853 |
|
|
</td>
|
| 854 |
|
|
|
| 855 |
|
|
</tr>
|
| 856 |
|
|
|
| 857 |
|
|
|
| 858 |
|
|
</tbody>
|
| 859 |
|
|
|
| 860 |
|
|
</table>
|
| 861 |
|
|
</td>
|
| 862 |
|
|
</tr>
|
| 863 |
|
|
<tr>
|
| 864 |
|
|
<td><font face="Arial,Helvetica"><font size="-1">Byte 3 </font></font></td>
|
| 865 |
|
|
<td>
|
| 866 |
|
|
|
| 867 |
|
|
<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="1">
|
| 868 |
|
|
|
| 869 |
|
|
<tbody>
|
| 870 |
|
|
<tr>
|
| 871 |
|
|
<td>
|
| 872 |
|
|
|
| 873 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Y Movement</font></font></center>
|
| 874 |
|
|
</td>
|
| 875 |
|
|
</tr>
|
| 876 |
|
|
|
| 877 |
|
|
|
| 878 |
|
|
</tbody>
|
| 879 |
|
|
|
| 880 |
|
|
</table>
|
| 881 |
|
|
</td>
|
| 882 |
|
|
|
| 883 |
|
|
</tr>
|
| 884 |
|
|
<tr>
|
| 885 |
|
|
<td><font face="Arial,Helvetica"><font size="-1">Byte 4</font></font></td>
|
| 886 |
|
|
<td>
|
| 887 |
|
|
|
| 888 |
|
|
<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="8">
|
| 889 |
|
|
<tbody>
|
| 890 |
|
|
<tr>
|
| 891 |
|
|
<td>
|
| 892 |
|
|
|
| 893 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Always
|
| 894 |
|
|
0</font></font></center>
|
| 895 |
|
|
|
| 896 |
|
|
</td>
|
| 897 |
|
|
<td>
|
| 898 |
|
|
|
| 899 |
|
|
<center>Always 0</center>
|
| 900 |
|
|
</td>
|
| 901 |
|
|
<td>
|
| 902 |
|
|
|
| 903 |
|
|
<center>5th Btn</center>
|
| 904 |
|
|
</td>
|
| 905 |
|
|
<td>
|
| 906 |
|
|
|
| 907 |
|
|
<center>4th Btn</center>
|
| 908 |
|
|
|
| 909 |
|
|
</td>
|
| 910 |
|
|
<td>
|
| 911 |
|
|
|
| 912 |
|
|
<center>Z3</center>
|
| 913 |
|
|
</td>
|
| 914 |
|
|
<td>
|
| 915 |
|
|
|
| 916 |
|
|
<center>Z2</center>
|
| 917 |
|
|
</td>
|
| 918 |
|
|
<td>
|
| 919 |
|
|
|
| 920 |
|
|
<center>Z1</center>
|
| 921 |
|
|
|
| 922 |
|
|
</td>
|
| 923 |
|
|
<td>
|
| 924 |
|
|
|
| 925 |
|
|
<center>Z0</center>
|
| 926 |
|
|
</td>
|
| 927 |
|
|
</tr>
|
| 928 |
|
|
|
| 929 |
|
|
|
| 930 |
|
|
</tbody>
|
| 931 |
|
|
|
| 932 |
|
|
</table>
|
| 933 |
|
|
</td>
|
| 934 |
|
|
</tr>
|
| 935 |
|
|
|
| 936 |
|
|
|
| 937 |
|
|
</tbody>
|
| 938 |
|
|
</table>
|
| 939 |
|
|
Z0-Z3 is a 2's complement number which represents the amount of movement
|
| 940 |
|
|
that has occurred since the last data report. Valid values range
|
| 941 |
|
|
from -8 to +7. <br>
|
| 942 |
|
|
4th Btn: 1 = 4th mouse button is pressed; 0 = 4th mouse button is not
|
| 943 |
|
|
pressed. <br>
|
| 944 |
|
|
5th Btn: 1 = 5th mouse button is pressed; 0 = 5th mouse button is not
|
| 945 |
|
|
pressed.</blockquote>
|
| 946 |
|
|
</blockquote>
|
| 947 |
|
|
You may have seen mice with two scrolling wheels--one vertical and
|
| 948 |
|
|
the other horizontal. These mice use the Microsoft Intellimouse data
|
| 949 |
|
|
packet format as described above. If the vertical wheel is scrolled
|
| 950 |
|
|
upward, the Z-counter is incremented by one and if that wheel is scrolled
|
| 951 |
|
|
down, the Z-counter is decremented by one. This is normal operation
|
| 952 |
|
|
for a scrolling wheel. However, if the <i>horizontal</i> wheel is
|
| 953 |
|
|
scrolled right, the Z-counter is incremented by <i>two</i> and if it is
|
| 954 |
|
|
scrolled left, the Z-counter is decremented by <i>two</i>. This seems
|
| 955 |
|
|
like an odd way to implement the second scrolling wheel, but it works since
|
| 956 |
|
|
the placement of the two wheels make it impossible to use both of them at
|
| 957 |
|
|
the same time (and if you try to trick the software and use both at the
|
| 958 |
|
|
same time, it will ignore the horizontal wheel.)
|
| 959 |
|
|
|
| 960 |
|
|
<p><b>Command Set:</b> </p>
|
| 961 |
|
|
|
| 962 |
|
|
<p>The following is the set of command accepted by the standard PS/2 mouse.
|
| 963 |
|
|
If the mouse is in Stream mode, the host should disable data reporting
|
| 964 |
|
|
(command F5h) before sending any other commands. </p>
|
| 965 |
|
|
|
| 966 |
|
|
<ul>
|
| 967 |
|
|
<li> FFh (Reset) - The mouse responds to this command with "acknowledge"
|
| 968 |
|
|
(FAh) then enters Reset Mode.</li>
|
| 969 |
|
|
<li> FEh (Resend) - The host sends this command whenever it receives
|
| 970 |
|
|
invalid data from the mouse. The mouse responds by resending the last<a href="#Footnotes">(2)</a> packet<a href="#Footnotes">(3)</a> it sent to
|
| 971 |
|
|
the host. If the mouse responds to the "Resend" command with
|
| 972 |
|
|
another invalid packet, the host may either issue another "Resend" command,
|
| 973 |
|
|
issue an "Error" command, cycle the mouse's power supply to reset the mouse,
|
| 974 |
|
|
or it may inhibit communication (by bringing the Clock line low).
|
| 975 |
|
|
|
| 976 |
|
|
The action taken depends on the host.</li>
|
| 977 |
|
|
<li> F6h (Set Defaults) - The mouse responds with "acknowledge" (FAh)
|
| 978 |
|
|
then loads the following values: Sampling rate = 100, Resolution =
|
| 979 |
|
|
4 counts/mm, Scaling = 1:1, Disable Data Reporting. The mouse then resets
|
| 980 |
|
|
its movement counters and enters stream mode.</li>
|
| 981 |
|
|
<li> F5h (Disable Data Reporting) - The mouse responds with "acknowledge"
|
| 982 |
|
|
(FAh) then disables data reporting and resets its movement counters.
|
| 983 |
|
|
This only effects data reporting in Stream mode and does not disable sampling.
|
| 984 |
|
|
Disabled stream mode funcions the same as remote mode.</li>
|
| 985 |
|
|
|
| 986 |
|
|
<li> F4h (Enable Data Reporting) - The mouse responds with "acknowledge"
|
| 987 |
|
|
(FAh) then enables data reporting and resets its movement counters.
|
| 988 |
|
|
This command may be issued while the mouse is in Remote Mode (or Stream
|
| 989 |
|
|
mode), but it will only effect data reporting in Stream mode.</li>
|
| 990 |
|
|
<li> F3h (Set Sample Rate) - The mouse responds with "acknowledge" (FAh)
|
| 991 |
|
|
then reads one more byte from the host. The mouse saves this byte
|
| 992 |
|
|
as the new sample rate. After receiving the sample rate, the mouse again
|
| 993 |
|
|
responds with "acknowledge" (0xFA) and resets its movement counters.
|
| 994 |
|
|
Valid sample rates are 10, 20, 40, 60, 80, 100, and 200 samples/sec.</li>
|
| 995 |
|
|
<li> F2h (Get Device ID) - The mouse responds with "acknowledge" (FAh)
|
| 996 |
|
|
followed by its device ID (00h for the standard PS/2 mouse.) The mouse
|
| 997 |
|
|
should also reset its movement counters.</li>
|
| 998 |
|
|
|
| 999 |
|
|
<li> F0h (Set Remote Mode) - The mouse responds with "acknowledge" (FAh)
|
| 1000 |
|
|
then resets its movement counters and enters remote mode.</li>
|
| 1001 |
|
|
<li> EEh (Set Wrap Mode) - The mouse responds with "acknowledge" (FAh)
|
| 1002 |
|
|
then resets its movement counters and enters wrap mode.</li>
|
| 1003 |
|
|
<li> ECh (Reset Wrap Mode) - The mouse responds with "acknowledge" (FAh)
|
| 1004 |
|
|
then resets its movement counters and enters the mode it was in prior to
|
| 1005 |
|
|
wrap mode (Stream Mode or Remote Mode.)</li>
|
| 1006 |
|
|
<li> EBh (Read Data) - The mouse responds with acknowledge (FAh) then
|
| 1007 |
|
|
sends a movement data packet. This is the only way to read data in Remote
|
| 1008 |
|
|
Mode. After the data packets has been successfully sent, it resets
|
| 1009 |
|
|
its movement counters.</li>
|
| 1010 |
|
|
|
| 1011 |
|
|
<li> EAh (Set Stream Mode) - The mouse responds with "acknowledge" then
|
| 1012 |
|
|
resets its movement counters and enters steram mode.</li>
|
| 1013 |
|
|
<li> E9h (Status Request) - The mouse responds with "acknowledge" then
|
| 1014 |
|
|
sends the following 3-byte status packet (then resets its movement counters.): </li>
|
| 1015 |
|
|
|
| 1016 |
|
|
<ul>
|
| 1017 |
|
|
<li> </li>
|
| 1018 |
|
|
|
| 1019 |
|
|
<table width="650" border="0" cellpadding="0" cellspacing="0">
|
| 1020 |
|
|
<tbody>
|
| 1021 |
|
|
|
| 1022 |
|
|
<tr>
|
| 1023 |
|
|
<td> <br>
|
| 1024 |
|
|
<font face="Arial,Helvetica"><font size="-1">Byte 1 </font></font></td>
|
| 1025 |
|
|
<td>
|
| 1026 |
|
|
|
| 1027 |
|
|
<table width="100%" border="0" cellpadding="0" cols="8">
|
| 1028 |
|
|
<tbody>
|
| 1029 |
|
|
<tr>
|
| 1030 |
|
|
<td>
|
| 1031 |
|
|
|
| 1032 |
|
|
<center>Bit 7</center>
|
| 1033 |
|
|
|
| 1034 |
|
|
</td>
|
| 1035 |
|
|
<td>
|
| 1036 |
|
|
|
| 1037 |
|
|
<center>Bit 6</center>
|
| 1038 |
|
|
</td>
|
| 1039 |
|
|
<td>
|
| 1040 |
|
|
|
| 1041 |
|
|
<center>Bit 5</center>
|
| 1042 |
|
|
</td>
|
| 1043 |
|
|
<td>
|
| 1044 |
|
|
|
| 1045 |
|
|
<center>Bit 4</center>
|
| 1046 |
|
|
|
| 1047 |
|
|
</td>
|
| 1048 |
|
|
<td>
|
| 1049 |
|
|
|
| 1050 |
|
|
<center>Bit 3</center>
|
| 1051 |
|
|
</td>
|
| 1052 |
|
|
<td>
|
| 1053 |
|
|
|
| 1054 |
|
|
<center>Bit 2</center>
|
| 1055 |
|
|
</td>
|
| 1056 |
|
|
<td>
|
| 1057 |
|
|
|
| 1058 |
|
|
<center>Bit 1</center>
|
| 1059 |
|
|
|
| 1060 |
|
|
</td>
|
| 1061 |
|
|
<td>
|
| 1062 |
|
|
|
| 1063 |
|
|
<center>Bit 0</center>
|
| 1064 |
|
|
</td>
|
| 1065 |
|
|
</tr>
|
| 1066 |
|
|
|
| 1067 |
|
|
|
| 1068 |
|
|
</tbody>
|
| 1069 |
|
|
|
| 1070 |
|
|
</table>
|
| 1071 |
|
|
|
| 1072 |
|
|
|
| 1073 |
|
|
<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="8">
|
| 1074 |
|
|
<tbody>
|
| 1075 |
|
|
|
| 1076 |
|
|
<tr>
|
| 1077 |
|
|
<td>
|
| 1078 |
|
|
|
| 1079 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Always
|
| 1080 |
|
|
0</font></font></center>
|
| 1081 |
|
|
</td>
|
| 1082 |
|
|
<td>
|
| 1083 |
|
|
|
| 1084 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Mode</font></font></center>
|
| 1085 |
|
|
</td>
|
| 1086 |
|
|
<td>
|
| 1087 |
|
|
|
| 1088 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Enable</font></font></center>
|
| 1089 |
|
|
|
| 1090 |
|
|
</td>
|
| 1091 |
|
|
<td>
|
| 1092 |
|
|
|
| 1093 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Scaling</font></font></center>
|
| 1094 |
|
|
</td>
|
| 1095 |
|
|
<td>
|
| 1096 |
|
|
|
| 1097 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Always
|
| 1098 |
|
|
0</font></font></center>
|
| 1099 |
|
|
</td>
|
| 1100 |
|
|
<td>
|
| 1101 |
|
|
|
| 1102 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Left
|
| 1103 |
|
|
Btn</font></font></center>
|
| 1104 |
|
|
|
| 1105 |
|
|
</td>
|
| 1106 |
|
|
<td>
|
| 1107 |
|
|
|
| 1108 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Middle
|
| 1109 |
|
|
Btn</font></font></center>
|
| 1110 |
|
|
</td>
|
| 1111 |
|
|
<td>
|
| 1112 |
|
|
|
| 1113 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Right
|
| 1114 |
|
|
Btn</font></font></center>
|
| 1115 |
|
|
</td>
|
| 1116 |
|
|
</tr>
|
| 1117 |
|
|
|
| 1118 |
|
|
|
| 1119 |
|
|
</tbody>
|
| 1120 |
|
|
|
| 1121 |
|
|
</table>
|
| 1122 |
|
|
|
| 1123 |
|
|
</td>
|
| 1124 |
|
|
</tr>
|
| 1125 |
|
|
<tr>
|
| 1126 |
|
|
<td><font face="Arial,Helvetica"><font size="-1">Byte 2</font></font></td>
|
| 1127 |
|
|
<td>
|
| 1128 |
|
|
|
| 1129 |
|
|
<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="1">
|
| 1130 |
|
|
<tbody>
|
| 1131 |
|
|
<tr>
|
| 1132 |
|
|
<td>
|
| 1133 |
|
|
|
| 1134 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Resolution</font></font></center>
|
| 1135 |
|
|
|
| 1136 |
|
|
</td>
|
| 1137 |
|
|
</tr>
|
| 1138 |
|
|
|
| 1139 |
|
|
|
| 1140 |
|
|
</tbody>
|
| 1141 |
|
|
|
| 1142 |
|
|
</table>
|
| 1143 |
|
|
</td>
|
| 1144 |
|
|
</tr>
|
| 1145 |
|
|
<tr>
|
| 1146 |
|
|
<td><font face="Arial,Helvetica"><font size="-1">Byte 3 </font></font></td>
|
| 1147 |
|
|
<td>
|
| 1148 |
|
|
|
| 1149 |
|
|
<table width="100%" border="1" cellpadding="0" cellspacing="0" cols="1">
|
| 1150 |
|
|
|
| 1151 |
|
|
<tbody>
|
| 1152 |
|
|
<tr>
|
| 1153 |
|
|
<td>
|
| 1154 |
|
|
|
| 1155 |
|
|
<center><font face="Arial,Helvetica"><font size="-1">Sample
|
| 1156 |
|
|
Rate</font></font></center>
|
| 1157 |
|
|
</td>
|
| 1158 |
|
|
</tr>
|
| 1159 |
|
|
|
| 1160 |
|
|
|
| 1161 |
|
|
</tbody>
|
| 1162 |
|
|
|
| 1163 |
|
|
</table>
|
| 1164 |
|
|
</td>
|
| 1165 |
|
|
|
| 1166 |
|
|
</tr>
|
| 1167 |
|
|
|
| 1168 |
|
|
</tbody>
|
| 1169 |
|
|
</table>
|
| 1170 |
|
|
|
| 1171 |
|
|
<p><i>Right, Middle, Left Btn</i> = 1 if button pressed; 0 if button
|
| 1172 |
|
|
is not pressed. <br>
|
| 1173 |
|
|
<i>Scaling</i> = 1 if scaling is 2:1; 0 if scaling is 1:1.
|
| 1174 |
|
|
(See commands E7h and E6h) <br>
|
| 1175 |
|
|
<i>Enable</i> = 1 if data reporting is enabled; 0 if data
|
| 1176 |
|
|
reporting is disabled. (See commands F5h and F4h) <br>
|
| 1177 |
|
|
|
| 1178 |
|
|
<i>Mode</i> = 1 if Remote Mode is enabled; 0 if Stream mode
|
| 1179 |
|
|
is enabled. (See commands F0h and EAh) <br>
|
| 1180 |
|
|
</p>
|
| 1181 |
|
|
|
| 1182 |
|
|
</ul>
|
| 1183 |
|
|
<li> E8h (Set Resolution) - The mouse responds with acknowledge (FAh)
|
| 1184 |
|
|
then reads one byte from the host and again responds with acknowledge (FAh)
|
| 1185 |
|
|
then resets its movement counters. The byte read from the host determines
|
| 1186 |
|
|
the resolution as follows: </li>
|
| 1187 |
|
|
<br>
|
| 1188 |
|
|
|
| 1189 |
|
|
|
| 1190 |
|
|
<center>
|
| 1191 |
|
|
<table width="300" border="1">
|
| 1192 |
|
|
<tbody>
|
| 1193 |
|
|
<tr>
|
| 1194 |
|
|
<td>
|
| 1195 |
|
|
<center>Byte Read from Host</center>
|
| 1196 |
|
|
</td>
|
| 1197 |
|
|
<td>
|
| 1198 |
|
|
<center>Resolution</center>
|
| 1199 |
|
|
|
| 1200 |
|
|
</td>
|
| 1201 |
|
|
</tr>
|
| 1202 |
|
|
<tr>
|
| 1203 |
|
|
<td>
|
| 1204 |
|
|
<center>0x00</center>
|
| 1205 |
|
|
</td>
|
| 1206 |
|
|
<td>
|
| 1207 |
|
|
<center>1 count/mm</center>
|
| 1208 |
|
|
</td>
|
| 1209 |
|
|
|
| 1210 |
|
|
</tr>
|
| 1211 |
|
|
<tr>
|
| 1212 |
|
|
<td>
|
| 1213 |
|
|
<center>0x01</center>
|
| 1214 |
|
|
</td>
|
| 1215 |
|
|
<td>
|
| 1216 |
|
|
<center>2 count/mm</center>
|
| 1217 |
|
|
</td>
|
| 1218 |
|
|
</tr>
|
| 1219 |
|
|
|
| 1220 |
|
|
<tr>
|
| 1221 |
|
|
<td>
|
| 1222 |
|
|
<center>0x02</center>
|
| 1223 |
|
|
</td>
|
| 1224 |
|
|
<td>
|
| 1225 |
|
|
<center>4 count/mm</center>
|
| 1226 |
|
|
</td>
|
| 1227 |
|
|
</tr>
|
| 1228 |
|
|
<tr>
|
| 1229 |
|
|
|
| 1230 |
|
|
<td>
|
| 1231 |
|
|
<center>0x03</center>
|
| 1232 |
|
|
</td>
|
| 1233 |
|
|
<td>
|
| 1234 |
|
|
<center>8 count/mm</center>
|
| 1235 |
|
|
</td>
|
| 1236 |
|
|
</tr>
|
| 1237 |
|
|
|
| 1238 |
|
|
</tbody>
|
| 1239 |
|
|
</table>
|
| 1240 |
|
|
|
| 1241 |
|
|
</center>
|
| 1242 |
|
|
|
| 1243 |
|
|
</ul>
|
| 1244 |
|
|
|
| 1245 |
|
|
<ul>
|
| 1246 |
|
|
<li> E7h (Set Scaling 2:1) - The mouse responds with acknowledge (FAh)
|
| 1247 |
|
|
then enables 2:1 scaling (discussed earlier in this document.)</li>
|
| 1248 |
|
|
<li> E6h (Set Scaling 1:1) - The mouse responds with acknowledge (FAh)
|
| 1249 |
|
|
then enables 1:1 scaling (discussed earlier in this document.)</li>
|
| 1250 |
|
|
|
| 1251 |
|
|
</ul>
|
| 1252 |
|
|
The only commands the standard PS/2 mouse will send to the host are
|
| 1253 |
|
|
the "Resend" (FEh) and "Error" (FCh). They both work the same as they
|
| 1254 |
|
|
do as host-to-device commands.
|
| 1255 |
|
|
|
| 1256 |
|
|
<p><b>Initialization:</b> </p>
|
| 1257 |
|
|
|
| 1258 |
|
|
<p>The PS/2 mouse is normally detected/initialized only when the computer
|
| 1259 |
|
|
is booting up. That is, the mouse is not hot-pluggable and you must
|
| 1260 |
|
|
restart your computer whenever you add/remove a PS/2 mouse (furthermore,
|
| 1261 |
|
|
some motherboards may be damaged if you add/remove a PS/2 mouse while the
|
| 1262 |
|
|
computer is running.) </p>
|
| 1263 |
|
|
|
| 1264 |
|
|
<p>The initial detection of the PS/2 mouse occurrs during POST. If
|
| 1265 |
|
|
a mouse is detected, the BIOS will allow the operating system to configure/enable
|
| 1266 |
|
|
the mouse. Otherwise, it will inhibit communication on the mouse's
|
| 1267 |
|
|
bus. If you boot the computer with a mouse attached, then detach/reattach
|
| 1268 |
|
|
the mouse while in Windows, the OS <i>may</i> be able to detect the mouse
|
| 1269 |
|
|
was reattached. Microsoft tried to support this, but it only works
|
| 1270 |
|
|
about 50% of the time. </p>
|
| 1271 |
|
|
|
| 1272 |
|
|
|
| 1273 |
|
|
<p>The following is the communication between my computer (running Win98SE)
|
| 1274 |
|
|
and mouse when it boots up with a standard PS/2 mouse attached. It
|
| 1275 |
|
|
is fairly typical of how a PS/2 mouse is initialized and if you want to
|
| 1276 |
|
|
emulate a PS/2 mouse it must (at minimum) be able to support the following
|
| 1277 |
|
|
sequence of commands... </p>
|
| 1278 |
|
|
|
| 1279 |
|
|
<ul>
|
| 1280 |
|
|
<li> <tt>Power-on Reset:</tt></li>
|
| 1281 |
|
|
<br>
|
| 1282 |
|
|
<tt>Mouse: AA Self-test passed</tt><br>
|
| 1283 |
|
|
|
| 1284 |
|
|
<tt>Mouse: 00 Mouse ID</tt><br>
|
| 1285 |
|
|
<tt>Host: FF Reset command</tt><br>
|
| 1286 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1287 |
|
|
|
| 1288 |
|
|
<tt>Mouse: AA Self-test passed</tt><br>
|
| 1289 |
|
|
<tt>Mouse: 00 Mouse ID</tt><br>
|
| 1290 |
|
|
<tt>Host: FF Reset command</tt><br>
|
| 1291 |
|
|
|
| 1292 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1293 |
|
|
<tt>Mouse: AA Self-test passed</tt><br>
|
| 1294 |
|
|
<tt>Mouse: 00 Mouse ID</tt><br>
|
| 1295 |
|
|
<tt>Host: FF Reset command</tt><br>
|
| 1296 |
|
|
|
| 1297 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1298 |
|
|
<tt>Mouse: AA Self-test passed</tt><br>
|
| 1299 |
|
|
<tt>Mouse: 00 Mouse ID</tt><br>
|
| 1300 |
|
|
<tt>Host: F3 Set Sample Rate : Attempt to Enter
|
| 1301 |
|
|
Microsoft</tt><br>
|
| 1302 |
|
|
|
| 1303 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1304 |
|
|
: Scrolling Mouse mode</tt><br>
|
| 1305 |
|
|
<tt>Host: C8 decimal 200
|
| 1306 |
|
|
:</tt><br>
|
| 1307 |
|
|
|
| 1308 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1309 |
|
|
:</tt><br>
|
| 1310 |
|
|
<tt>Host: F3 Set Sample Rate :</tt><br>
|
| 1311 |
|
|
|
| 1312 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1313 |
|
|
:</tt><br>
|
| 1314 |
|
|
<tt>Host: 64 decimal 100
|
| 1315 |
|
|
:</tt><br>
|
| 1316 |
|
|
|
| 1317 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1318 |
|
|
:</tt><br>
|
| 1319 |
|
|
<tt>Host: F3 Set Sample Rate :</tt><br>
|
| 1320 |
|
|
|
| 1321 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1322 |
|
|
:</tt><br>
|
| 1323 |
|
|
<tt>Host: 50 decimal 80
|
| 1324 |
|
|
:</tt><br>
|
| 1325 |
|
|
|
| 1326 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1327 |
|
|
:</tt><br>
|
| 1328 |
|
|
<tt>Host: F2 Read Device Type :</tt><br>
|
| 1329 |
|
|
|
| 1330 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1331 |
|
|
:</tt><br>
|
| 1332 |
|
|
<tt>Mouse: 00 Mouse ID
|
| 1333 |
|
|
: Response 03 if microsoft scrolling mouse</tt><br>
|
| 1334 |
|
|
<tt>Host: F3 Set Sample Rate </tt><br>
|
| 1335 |
|
|
|
| 1336 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1337 |
|
|
<tt>Host: 0A decimal 10</tt><br>
|
| 1338 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1339 |
|
|
|
| 1340 |
|
|
<tt>Host: F2 Read Device Type</tt><br>
|
| 1341 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1342 |
|
|
<tt>Mouse: 00 Mouse ID</tt><br>
|
| 1343 |
|
|
|
| 1344 |
|
|
<tt>Host: E8 Set resolution</tt><br>
|
| 1345 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1346 |
|
|
<tt>Host: 03 8 Counts/mm</tt><br>
|
| 1347 |
|
|
|
| 1348 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1349 |
|
|
<tt>Host: E6 Set Scaling 1:1</tt><br>
|
| 1350 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1351 |
|
|
|
| 1352 |
|
|
<tt>Host: F3 Set Sample Rate</tt><br>
|
| 1353 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1354 |
|
|
<tt>Host: 28 decimal 40</tt><br>
|
| 1355 |
|
|
|
| 1356 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1357 |
|
|
<tt>Host: F4 Enable</tt><br>
|
| 1358 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1359 |
|
|
|
| 1360 |
|
|
<tt>Initialization complete...</tt>
|
| 1361 |
|
|
<p><tt>If I then press the Left Button...</tt> <br>
|
| 1362 |
|
|
<tt>Mouse: 09 1 1 00001001; bit0 = Left button state; bit3 =
|
| 1363 |
|
|
always 1</tt> <br>
|
| 1364 |
|
|
<tt>Mouse: 00 1 1 No X-movement</tt> <br>
|
| 1365 |
|
|
<tt>Mouse: 00 1 1 No Y-movement</tt> <br>
|
| 1366 |
|
|
|
| 1367 |
|
|
<tt>... and release the Left Button:</tt> <br>
|
| 1368 |
|
|
<tt>Mouse: 08 0 1 00001000 bit0 = Left button state; bit3 =
|
| 1369 |
|
|
always 1</tt> <br>
|
| 1370 |
|
|
<tt>Mouse: 00 1 1 No X-movement</tt> <br>
|
| 1371 |
|
|
<tt>Mouse: 00 1 1 No Y-movement</tt></p>
|
| 1372 |
|
|
|
| 1373 |
|
|
</ul>
|
| 1374 |
|
|
|
| 1375 |
|
|
The following is the communication between my computer (running Win98SE)
|
| 1376 |
|
|
and mouse when it boots up with an (emulated) Intellimouse...
|
| 1377 |
|
|
|
| 1378 |
|
|
<ul>
|
| 1379 |
|
|
<li> <tt>Power-on Reset:</tt></li>
|
| 1380 |
|
|
<br>
|
| 1381 |
|
|
<tt>Mouse: AA Self-test passed</tt><br>
|
| 1382 |
|
|
<tt>Mouse: 00 Mouse ID</tt><br>
|
| 1383 |
|
|
|
| 1384 |
|
|
<tt>Host: FF Reset command</tt><br>
|
| 1385 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1386 |
|
|
<tt>Mouse: AA Self-test passed</tt><br>
|
| 1387 |
|
|
|
| 1388 |
|
|
<tt>Mouse: 00 Mouse ID</tt><br>
|
| 1389 |
|
|
<tt>Host: FF Reset command</tt><br>
|
| 1390 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1391 |
|
|
|
| 1392 |
|
|
<tt>Mouse: AA Self-test passed</tt><br>
|
| 1393 |
|
|
<tt>Mouse: 00 Mouse ID</tt><br>
|
| 1394 |
|
|
<tt>Host: FF Reset command</tt><br>
|
| 1395 |
|
|
|
| 1396 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1397 |
|
|
<tt>Mouse: AA Self-test passed</tt><br>
|
| 1398 |
|
|
<tt>Mouse: 00 Mouse ID</tt><br>
|
| 1399 |
|
|
<tt>Host: F3 Set Sample Rate : Attempt to Enter
|
| 1400 |
|
|
Microsoft </tt><br>
|
| 1401 |
|
|
|
| 1402 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1403 |
|
|
: Scrolling Mouse mode</tt><br>
|
| 1404 |
|
|
<tt>Host: C8 decimal 200
|
| 1405 |
|
|
:</tt><br>
|
| 1406 |
|
|
|
| 1407 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1408 |
|
|
:</tt><br>
|
| 1409 |
|
|
<tt>Host: F3 Set Sample Rate :</tt><br>
|
| 1410 |
|
|
|
| 1411 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1412 |
|
|
:</tt><br>
|
| 1413 |
|
|
<tt>Host: 64 decimal 100
|
| 1414 |
|
|
:</tt><br>
|
| 1415 |
|
|
|
| 1416 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1417 |
|
|
:</tt><br>
|
| 1418 |
|
|
<tt>Host: F3 Set Sample Rate :</tt><br>
|
| 1419 |
|
|
|
| 1420 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1421 |
|
|
:</tt><br>
|
| 1422 |
|
|
<tt>Host: 50 decimal 80
|
| 1423 |
|
|
:</tt><br>
|
| 1424 |
|
|
|
| 1425 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1426 |
|
|
:</tt><br>
|
| 1427 |
|
|
<tt>Host: F2 Read Device Type :</tt><br>
|
| 1428 |
|
|
|
| 1429 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1430 |
|
|
:</tt><br>
|
| 1431 |
|
|
<tt>Mouse: 03 Mouse ID
|
| 1432 |
|
|
: Response 03 if microsoft scrolling mouse</tt><br>
|
| 1433 |
|
|
<tt>Host: E8 Set Resolution </tt><br>
|
| 1434 |
|
|
|
| 1435 |
|
|
<tt>Mouse: FA Acknowledge </tt><br>
|
| 1436 |
|
|
<tt>Host: 03 8 counts/mm</tt><br>
|
| 1437 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1438 |
|
|
|
| 1439 |
|
|
<tt>Host: E6 Set scaling 1:1</tt><br>
|
| 1440 |
|
|
<tt>Dev: FA Acknowledge</tt><br>
|
| 1441 |
|
|
<tt>Host: F3 Set Sample Rate </tt><br>
|
| 1442 |
|
|
|
| 1443 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1444 |
|
|
<tt>Host: 28 decimal 40</tt><br>
|
| 1445 |
|
|
<tt>Mouse: FA Acknowledge</tt><br>
|
| 1446 |
|
|
|
| 1447 |
|
|
<tt>Host: F4 Enable device </tt><br>
|
| 1448 |
|
|
<tt>Mouse: FA Acknowledge</tt>
|
| 1449 |
|
|
<p><tt>If I then press the left mouse button:</tt> <br>
|
| 1450 |
|
|
<tt>Mouse: 09 00001001 bit0 = Left button state; bit3
|
| 1451 |
|
|
= always 1</tt> <br>
|
| 1452 |
|
|
|
| 1453 |
|
|
<tt>Mouse: 00 No X-movement</tt> <br>
|
| 1454 |
|
|
<tt>Mouse: 00 No Y-movement</tt> <br>
|
| 1455 |
|
|
<tt>Mouse: 00 No Z-movement</tt> </p>
|
| 1456 |
|
|
|
| 1457 |
|
|
|
| 1458 |
|
|
<p><tt>...and then release the left mouse button button:</tt> <br>
|
| 1459 |
|
|
<tt>Mouse: 08 00001000 bit0 = Left button state; bit3
|
| 1460 |
|
|
= always 1</tt> <br>
|
| 1461 |
|
|
<tt>Mouse: 00 No X-movement</tt> <br>
|
| 1462 |
|
|
<tt>Mouse: 00 No Y-movement</tt> <br>
|
| 1463 |
|
|
|
| 1464 |
|
|
<tt>Mouse: 00 No Z-movement</tt></p>
|
| 1465 |
|
|
|
| 1466 |
|
|
</ul>
|
| 1467 |
|
|
<tt>After I downloaded/installed the Microsoft's Intellimouse drivers
|
| 1468 |
|
|
with support for the 4th and 5th buttons, the following sequence was found:</tt>
|
| 1469 |
|
|
|
| 1470 |
|
|
<blockquote><tt>... (starts same as before) ...</tt> <br>
|
| 1471 |
|
|
<tt>Host: F3 Set Sample Rate : Attempt
|
| 1472 |
|
|
to Enter Microsoft </tt> <br>
|
| 1473 |
|
|
|
| 1474 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1475 |
|
|
: Scrolling Mouse mode.</tt> <br>
|
| 1476 |
|
|
<tt>Host: C8 decimal 200
|
| 1477 |
|
|
:</tt> <br>
|
| 1478 |
|
|
|
| 1479 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1480 |
|
|
:</tt> <br>
|
| 1481 |
|
|
<tt>Host: F3 Set Sample Rate :</tt>
|
| 1482 |
|
|
|
| 1483 |
|
|
<br>
|
| 1484 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1485 |
|
|
:</tt> <br>
|
| 1486 |
|
|
<tt>Host: 64 decimal 100
|
| 1487 |
|
|
|
| 1488 |
|
|
:</tt> <br>
|
| 1489 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1490 |
|
|
:</tt> <br>
|
| 1491 |
|
|
<tt>Host: F3 Set Sample Rate :</tt>
|
| 1492 |
|
|
|
| 1493 |
|
|
<br>
|
| 1494 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1495 |
|
|
:</tt> <br>
|
| 1496 |
|
|
<tt>Host: 50 decimal 80
|
| 1497 |
|
|
|
| 1498 |
|
|
:</tt> <br>
|
| 1499 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1500 |
|
|
:</tt> <br>
|
| 1501 |
|
|
<tt>Host: F2 Read Device Type :</tt> <br>
|
| 1502 |
|
|
|
| 1503 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1504 |
|
|
:</tt> <br>
|
| 1505 |
|
|
<tt>Mouse: 03 Mouse ID
|
| 1506 |
|
|
: Response 03 if microsoft scrolling mouse.</tt> <br>
|
| 1507 |
|
|
|
| 1508 |
|
|
<tt>Host: F3 Set Sample Rate : Attempt
|
| 1509 |
|
|
to Enter Microsoft 5-button </tt> <br>
|
| 1510 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1511 |
|
|
: Scrolling Mouse mode.</tt> <br>
|
| 1512 |
|
|
|
| 1513 |
|
|
<tt>Host: C8 decimal 200
|
| 1514 |
|
|
:</tt> <br>
|
| 1515 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1516 |
|
|
:</tt> <br>
|
| 1517 |
|
|
|
| 1518 |
|
|
<tt>Host: F3 Set Sample Rate :</tt>
|
| 1519 |
|
|
<br>
|
| 1520 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1521 |
|
|
:</tt> <br>
|
| 1522 |
|
|
|
| 1523 |
|
|
<tt>Host: C8 decimal 200
|
| 1524 |
|
|
:</tt> <br>
|
| 1525 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1526 |
|
|
:</tt> <br>
|
| 1527 |
|
|
|
| 1528 |
|
|
<tt>Host: F3 Set Sample Rate :</tt>
|
| 1529 |
|
|
<br>
|
| 1530 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1531 |
|
|
:</tt> <br>
|
| 1532 |
|
|
|
| 1533 |
|
|
<tt>Host: 50 decimal 80
|
| 1534 |
|
|
:</tt> <br>
|
| 1535 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1536 |
|
|
:</tt> <br>
|
| 1537 |
|
|
|
| 1538 |
|
|
<tt>Host: F2 Read Device Type :</tt> <br>
|
| 1539 |
|
|
<tt>Mouse: FA Acknowledge
|
| 1540 |
|
|
:</tt> <br>
|
| 1541 |
|
|
|
| 1542 |
|
|
<tt>Mouse: 04 Mouse ID
|
| 1543 |
|
|
: Response 04 if 5-button scrolling mouse.</tt> <br>
|
| 1544 |
|
|
<tt>... rest of initialization same as before ...</tt></blockquote>
|
| 1545 |
|
|
<b>Emulation/Interfacing:</b>
|
| 1546 |
|
|
<ul>
|
| 1547 |
|
|
<li> Click here for routines that emulate a PS/2 mouse or keyboard</li>
|
| 1548 |
|
|
|
| 1549 |
|
|
<li> Click here for routines that emulate a PS/2 host (ie, interface
|
| 1550 |
|
|
a mouse/keyboard)</li>
|
| 1551 |
|
|
<li> Click <a href="http://panda.cs.ndsu.nodak.edu/%7Eachapwes/PICmicro/code/Projects/mouse/ps2mouse.html">here</a>
|
| 1552 |
|
|
for a fully-functional PS/2 mouse written for the PIC16F</li>
|
| 1553 |
|
|
|
| 1554 |
|
|
</ul>
|
| 1555 |
|
|
|
| 1556 |
|
|
<blockquote>
|
| 1557 |
|
|
<ul>
|
| 1558 |
|
|
|
| 1559 |
|
|
|
| 1560 |
|
|
</ul>
|
| 1561 |
|
|
</blockquote>
|
| 1562 |
|
|
|
| 1563 |
|
|
<p><a name="Footnotes"></a><b>Footnotes:</b> </p>
|
| 1564 |
|
|
|
| 1565 |
|
|
<blockquote>1) 2:1 scaling only applies to the automatic data reporting in
|
| 1566 |
|
|
Stream mode. It does not effect the reported data sent in response to the
|
| 1567 |
|
|
"Read Data" command.
|
| 1568 |
|
|
<p>2) The mouse and host do not buffer "Resend" commands. This means
|
| 1569 |
|
|
"Resend" will never be sent in response to the "Resend" command.
|
| 1570 |
|
|
</p>
|
| 1571 |
|
|
|
| 1572 |
|
|
<p>3) A "packet" may be a 3-byte movement data packet, a 4-byte
|
| 1573 |
|
|
movement data packet (for the Intellimouse), a 3-byte status packet (see
|
| 1574 |
|
|
"Status Request" command) a 2-byte completion-code-ID packet (AAh,00h or
|
| 1575 |
|
|
FCh,00h), or a 1-byte response to a command.<br>
|
| 1576 |
|
|
|
| 1577 |
|
|
</p>
|
| 1578 |
|
|
</blockquote>
|
| 1579 |
|
|
<br>
|
| 1580 |
|
|
<br>
|
| 1581 |
|
|
</body></html>
|
