<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright (c) 2016 OpenPOWER Foundation
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<chapter xmlns="http://docbook.org/ns/docbook"
xmlns:xi="http://www.w3.org/2001/XInclude"
xmlns:xl="http://www.w3.org/1999/xlink"
version="5.0" xml:lang="en"
xml:id="ch_error_codes">
<title>Error Codes</title>
<section xml:id="dbdoclet.50569337_63826">
<title>Displaying Codes on the Standard Operator Panels</title>
<variablelist>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569337_63826"
xrefstyle="select: labelnumber nopage"/>-1.</emphasis></term>
<listitem>
<para><emphasis role="bold">Platform Implementation:</emphasis> Platforms must display
firmware progress codes (4 hex digits) on the operator panel display. On
2x16 LCD displays, the progress codes are displayed left-justified on the
first line.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569337_63826"
xrefstyle="select: labelnumber nopage"/>-2.</emphasis></term>
<listitem>
<para><emphasis role="bold">Platform Implementation:</emphasis> Platforms must display
firmware error codes (8 hex digits) on the system console (graphic or
tty), and left-justified on the first line of a 2x16 LCD operator panel
display (if available).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569337_63826"
xrefstyle="select: labelnumber nopage"/>-3.</emphasis></term>
<listitem>
<para><emphasis role="bold">Platform Implementation:</emphasis> When a platform displays
firmware error codes, associated location codes must be displayed on the
following line on the system console (graphic or tty), and left-justified
on the second line of a 2x16 LCD operator panel display (if
available).</para>
</listitem>
</varlistentry>
</variablelist>
<para>The following describes in more detail the standard platform usage
of operator panel LEDs or LCDs for the display of firmware progress and
error codes.</para>
<itemizedlist>
<listitem>
<para><emphasis role="bold">Progress codes: </emphasis>Progress codes
from the system firmware and
service processor firmware are 4 hex digits in the range from 0x8000
through 0xFFFF. Codes are displayed in the 4 character positions of a 1x4
LED, or left justified in the first line of a 2x16 LCD. Subsequent
progress codes are displayed on top of (overlaying) the previous one. If
the system “hangs”, the last displayed progress code is left
on the display.</para>
</listitem>
<listitem>
<para><emphasis role="bold">Error codes: </emphasis>Error codes are 8
hex digits, as defined in
<xref linkend="dbdoclet.50569337_36534"/>. These codes are displayed by
either boot ROM Power On Self Test (POST) or the service processor. If a
critical error is detected which prevents a successful boot or results in
system halt condition, the error code will be displayed left justified on
the first line of a 2x16 LCD. The error code is left on the LCD until the
system is reset or powered down. Error codes are not displayed on the
operator panel of platforms with only a 4-digit LED. On all platforms,
however, POST error codes are displayed on any system console (graphic or
tty). For non-critical errors where the system can boot and operate
normally or in a degraded mode, the associated error codes are not
displayed, but are reported to the OS via the POST error log and the RTAS
<emphasis>event-scan</emphasis> service.</para>
</listitem>
<listitem>
<para><emphasis role="bold">Location Codes: </emphasis>Location codes
describe the physical location of
the most probable failing part associated with an error code. When an
error code is displayed on the first line of a 2x16 LCD, the location
code, if known, is displayed left justified on the second line. The
location code will remain on the LCD along with the error code until the
system is reset or powered down. Location codes for POST errors are also
displayed on any system console (graphic or tty), on the next line below
the error code.</para>
</listitem>
</itemizedlist>
</section>
<section xml:id="dbdoclet.50569337_36534">
<title>Firmware Error Codes</title>
<para>The error code is an 8-character (4-byte) hexadecimal code produced
by firmware to identify the potential failing function or FRU in a
system. It consists of 5 source code characters and 3 reason code
characters. Individual characters within the error code have specific
field definitions, as defined in the following tables.</para>
<variablelist>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569337_36534"
xrefstyle="select: labelnumber nopage"/>-1.</emphasis></term>
<listitem>
<para><emphasis role="bold">Platform Implementation:</emphasis> To indicate the occurrence
of a critical platform error, platforms must display (either on an
operator panel or console) an 8-digit hex error code as defined in
<xref linkend="dbdoclet.50569337_58681"/> and
<xref linkend="dbdoclet.50569337_51582"/>.</para>
</listitem>
</varlistentry>
</variablelist>
<table frame="all" pgwide="1" xml:id="dbdoclet.50569337_58681">
<title>Service Reference Code (SRC) Field Layout</title>
<?dbhtml table-width="50%" ?>
<?dbfo table-width="50%" ?>
<tgroup cols="8">
<colspec colname="c1" colwidth="12*" />
<colspec colname="c2" colwidth="12*" />
<colspec colname="c3" colwidth="12*" />
<colspec colname="c4" colwidth="12*" />
<colspec colname="c5" colwidth="12*" />
<colspec colname="c6" colwidth="12*" />
<colspec colname="c7" colwidth="12*" />
<colspec colname="c8" colwidth="12*" />
<thead>
<row>
<entry nameend="c5" namest="c1">
<para>
<emphasis role="bold">Source Code</emphasis>
</para>
</entry>
<entry nameend="c8" namest="c6">
<para>
<emphasis role="bold">Reason Code</emphasis>
</para>
</entry>
</row>
</thead>
<tbody>
<row>
<entry nameend="c2" namest="c1">
<para>
<emphasis role="bold">Byte 0</emphasis>
</para>
</entry>
<entry nameend="c4" namest="c3">
<para>
<emphasis role="bold">Byte 1</emphasis>
</para>
</entry>
<entry nameend="c6" namest="c5">
<para>
<emphasis role="bold">Byte 2</emphasis>
</para>
</entry>
<entry nameend="c8" namest="c7">
<para>
<emphasis role="bold">Byte 3</emphasis>
</para>
</entry>
</row>
<row>
<entry>
<para>S1</para>
</entry>
<entry>
<para>S2</para>
</entry>
<entry>
<para>S3</para>
</entry>
<entry>
<para>S4</para>
</entry>
<entry>
<para>S5</para>
</entry>
<entry>
<para>R1</para>
</entry>
<entry>
<para>R2</para>
</entry>
<entry>
<para>R3</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
<table frame="all" pgwide="1" xml:id="dbdoclet.50569337_51582">
<title>Service Reference Code (SRC) Field
Descriptions</title>
<?dbhtml table-width="80%" ?>
<?dbfo table-width="80%" ?>
<tgroup cols="2">
<colspec colname="c1" colwidth="15*" />
<colspec colname="c2" colwidth="85*" />
<thead>
<row>
<entry>
<para>
<emphasis role="bold">Field</emphasis>
</para>
</entry>
<entry>
<para>
<emphasis role="bold">Description</emphasis>
</para>
</entry>
</row>
</thead>
<tbody>
<row>
<entry>
<para>S1</para>
</entry>
<entry>
<para>Maintenance Package Source that produced the SRN</para>
<para>0: Reserved</para>
<para>1: Reserved</para>
<para>2: POST, Firmware</para>
<para>3: BIST</para>
<para>4: Service processor, base system controller, etc.</para>
<para>5: Reserved (potentially for use by AIX
Diagnostics)</para>
<para>8: Product-Specific Service Guide, MAPs</para>
<para>9: Reserved (potentially for use by the Problem Solving
Guide)</para>
<para>A-F: Reserved for future extension</para>
</entry>
</row>
<row>
<entry>
<para>S2</para>
</entry>
<entry>
<para>Where applicable, use the lower nibble of the
<emphasis>
<xref linkend="dbdoclet.50569387_65468"/>
</emphasis> base class code for the IOA definition (see
<xref linkend="dbdoclet.50569337_10405"/>). Only 00 to 0C are
currently defined in Revision 2.1, therefore the high nibble is
always zero. (There is a potential exposure that the high
nibble will be defined in the future, but currently there are
13 base classes defined which include every device class, with
3 remaining characters for future extension by the PCI SIG.
Therefore the exposure is in the far future.) For non-PCI
devices, use base class 0 to extend the definition (see
<xref linkend="dbdoclet.50569337_69141"/>).</para>
</entry>
</row>
<row>
<entry>
<para>S3-S4</para>
</entry>
<entry>
<para>Where applicable, use the
<emphasis>
<xref linkend="dbdoclet.50569387_65468"/>
</emphasis> subclass code for IOA definition (see
<xref linkend="dbdoclet.50569337_10405"/>). Also, extend the
definition to include non-PCI devices where it is not fully
utilized by PCI specification (see
<xref linkend="dbdoclet.50569337_69141"/>).</para>
</entry>
</row>
<row>
<entry>
<para>S5</para>
</entry>
<entry>
<para>Unique version of the device/FRU type for a particular
product</para>
</entry>
</row>
<row>
<entry>
<para>R1</para>
</entry>
<entry>
<para>Device/FRU unique failure reason codes.</para>
<para>For POST: assigned by Firmware Developer.</para>
<para>For AIX Diagnostics (S1 = 5, not currently
supported):</para>
<para>1-7: Use in combination with R2,R3 for diagnostic test
failure when maximum isolation was obtained.</para>
<para>8-9: Use in combination with R2,R3 for diagnostic test
failure when maximum isolation was NOT obtained.</para>
<para>A: Log analysis of POST error log</para>
<para>B: Log analysis of machine check or checkstop error
log</para>
<para>C: Log analysis of AIX device driver error log</para>
<para>D: diagnostic detected missing resource</para>
<para>E-F: Reserved</para>
<para>For others: assigned by respective developers.</para>
</entry>
</row>
<row>
<entry>
<para>R2-R3</para>
</entry>
<entry>
<para>Device/FRU unique failure reason codes.</para>
<para>For POST: assigned by Firmware Developer</para>
<para>For others: assigned by respective developers.</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
<table frame="all" pgwide="1" xml:id="dbdoclet.50569337_10405">
<title>Current PCI Class Code Definition</title>
<?dbhtml table-width="75%" ?>
<?dbfo table-width="75%" ?>
<tgroup cols="3">
<colspec colname="c1" colwidth="20*" />
<colspec colname="c2" colwidth="20*" />
<colspec colname="c3" colwidth="60*" />
<thead>
<row>
<entry>
<para>
<emphasis role="bold">PCI Base Class (lower
nibble)S2</emphasis>
</para>
</entry>
<entry>
<para>
<emphasis role="bold">PCI Sub-ClassS3-S4</emphasis>
</para>
</entry>
<entry>
<para>
<emphasis role="bold">Description</emphasis>
</para>
</entry>
</row>
</thead>
<tbody>
<row>
<entry morerows="2">
<para>0</para>
</entry>
<entry nameend="c3" namest="c2">
<para>Devices that were built before the class code field was
defined</para>
</entry>
</row>
<row>
<entry>
<para>00</para>
</entry>
<entry>
<para>All currently implemented IOAs except VGA-compatible
IOAs.</para>
</entry>
</row>
<row>
<entry>
<para>01</para>
</entry>
<entry>
<para>VGA-compatible IOAs.</para>
</entry>
</row>
<row>
<entry morerows="6">
<para>1</para>
</entry>
<entry nameend="c3" namest="c2">
<para>Mass storage controller.</para>
</entry>
</row>
<row>
<entry>
<para>00</para>
</entry>
<entry>
<para>SCSI bus controller.</para>
</entry>
</row>
<row>
<entry>
<para>01</para>
</entry>
<entry>
<para>IDE controller.</para>
</entry>
</row>
<row>
<entry>
<para>02</para>
</entry>
<entry>
<para>Floppy disk controller.</para>
</entry>
</row>
<row>
<entry>
<para>03</para>
</entry>
<entry>
<para>Intelligent Peripheral Interface (IPI) bus
controller.</para>
</entry>
</row>
<row>
<entry>
<para>04</para>
</entry>
<entry>
<para>Redundant Array of Independent Disks (RAID)
controller.</para>
</entry>
</row>
<row>
<entry>
<para>80</para>
</entry>
<entry>
<para>Other mass storage controller.</para>
</entry>
</row>
<row>
<entry morerows="5">
<para>2</para>
</entry>
<entry nameend="c3" namest="c2">
<para>Network controller.</para>
</entry>
</row>
<row>
<entry>
<para>00</para>
</entry>
<entry>
<para>Ethernet controller.</para>
</entry>
</row>
<row>
<entry>
<para>01</para>
</entry>
<entry>
<para>Token Ring controller.</para>
</entry>
</row>
<row>
<entry>
<para>02</para>
</entry>
<entry>
<para>FDDI controller.</para>
</entry>
</row>
<row>
<entry>
<para>03</para>
</entry>
<entry>
<para>ATM controller.</para>
</entry>
</row>
<row>
<entry>
<para>80</para>
</entry>
<entry>
<para>Other Network controller.</para>
</entry>
</row>
<row>
<entry morerows="3">
<para>3</para>
</entry>
<entry nameend="c3" namest="c2">
<para>Display controller.</para>
</entry>
</row>
<row>
<entry>
<para>00</para>
</entry>
<entry>
<para>VGA-Compatible controller.</para>
</entry>
</row>
<row>
<entry>
<para>01</para>
</entry>
<entry>
<para>Extended Graphics Array (XGA) controller.</para>
</entry>
</row>
<row>
<entry>
<para>80</para>
</entry>
<entry>
<para>Other display controller.</para>
</entry>
</row>
<row>
<entry morerows="3">
<para>4</para>
</entry>
<entry nameend="c3" namest="c2">
<para>Multimedia device</para>
</entry>
</row>
<row>
<entry>
<para>00</para>
</entry>
<entry>
<para>Video device</para>
</entry>
</row>
<row>
<entry>
<para>01</para>
</entry>
<entry>
<para>Audio device</para>
</entry>
</row>
<row>
<entry>
<para>80</para>
</entry>
<entry>
<para>Other multimedia device</para>
</entry>
</row>
<row>
<entry morerows="3">
<para>5</para>
</entry>
<entry nameend="c3" namest="c2">
<para>Memory controller.</para>
</entry>
</row>
<row>
<entry>
<para>00</para>
</entry>
<entry>
<para>RAM</para>
</entry>
</row>
<row>
<entry>
<para>01</para>
</entry>
<entry>
<para>Flash</para>
</entry>
</row>
<row>
<entry>
<para>80</para>
</entry>
<entry>
<para>Other memory controller.</para>
</entry>
</row>
<row>
<entry morerows="9">
<para>6</para>
</entry>
<entry nameend="c3" namest="c2">
<para>Bridge IOAs.</para>
</entry>
</row>
<row>
<entry>
<para>00</para>
</entry>
<entry>
<para>Host bridge</para>
</entry>
</row>
<row>
<entry>
<para>01</para>
</entry>
<entry>
<para>Reserved</para>
</entry>
</row>
<row>
<entry>
<para>02</para>
</entry>
<entry>
<para>Reserved</para>
</entry>
</row>
<row>
<entry>
<para>03</para>
</entry>
<entry>
<para>Reserved</para>
</entry>
</row>
<row>
<entry>
<para>04</para>
</entry>
<entry>
<para>PCI-to-PCI bridge</para>
</entry>
</row>
<row>
<entry>
<para>05</para>
</entry>
<entry>
<para>Reserved</para>
</entry>
</row>
<row>
<entry>
<para>06</para>
</entry>
<entry>
<para>Reserved</para>
</entry>
</row>
<row>
<entry>
<para>07</para>
</entry>
<entry>
<para>Reserved</para>
</entry>
</row>
<row>
<entry>
<para>80</para>
</entry>
<entry>
<para>Other bridge device.</para>
</entry>
</row>
<row>
<entry morerows="3">
<para>7</para>
</entry>
<entry nameend="c3" namest="c2">
<para>Simple communication controllers.</para>
</entry>
</row>
<row>
<entry>
<para>00</para>
</entry>
<entry>
<para>Serial controllers.</para>
</entry>
</row>
<row>
<entry>
<para>01</para>
</entry>
<entry>
<para>Parallel port.</para>
</entry>
</row>
<row>
<entry>
<para>80</para>
</entry>
<entry>
<para>Other communication controllers.</para>
</entry>
</row>
<row>
<entry morerows="5">
<para>8</para>
</entry>
<entry nameend="c3" namest="c2">
<para>Generic system peripherals</para>
</entry>
</row>
<row>
<entry>
<para>00</para>
</entry>
<entry>
<para>PIC</para>
</entry>
</row>
<row>
<entry>
<para>01</para>
</entry>
<entry>
<para>DMA Controller.</para>
</entry>
</row>
<row>
<entry>
<para>02</para>
</entry>
<entry>
<para>System timer</para>
</entry>
</row>
<row>
<entry>
<para>03</para>
</entry>
<entry>
<para>Real-Time Clock (RTC) controller</para>
</entry>
</row>
<row>
<entry>
<para>80</para>
</entry>
<entry>
<para>Other system peripherals</para>
</entry>
</row>
<row>
<entry morerows="4">
<para>9</para>
</entry>
<entry nameend="c3" namest="c2">
<para>Input devices</para>
</entry>
</row>
<row>
<entry>
<para>00</para>
</entry>
<entry>
<para>Keyboard controller</para>
</entry>
</row>
<row>
<entry>
<para>01</para>
</entry>
<entry>
<para>Digitizer (pen).</para>
</entry>
</row>
<row>
<entry>
<para>02</para>
</entry>
<entry>
<para>Mouse controller</para>
</entry>
</row>
<row>
<entry>
<para>80</para>
</entry>
<entry>
<para>Other input controllers.</para>
</entry>
</row>
<row>
<entry morerows="2">
<para>A</para>
</entry>
<entry nameend="c3" namest="c2">
<para>Docking stations</para>
</entry>
</row>
<row>
<entry>
<para>00</para>
</entry>
<entry>
<para>Generic docking station</para>
</entry>
</row>
<row>
<entry>
<para>80</para>
</entry>
<entry>
<para>Other type of docking station</para>
</entry>
</row>
<row>
<entry morerows="2">
<para>B</para>
</entry>
<entry nameend="c3" namest="c2">
<para>Processors</para>
</entry>
</row>
<row>
<entry>
<para>20</para>
</entry>
<entry>
<para>PA compliant (PowerPC and successors)</para>
</entry>
</row>
<row>
<entry>
<para>40</para>
</entry>
<entry>
<para>Co-processor</para>
</entry>
</row>
<row>
<entry morerows="2">
<para>C</para>
</entry>
<entry nameend="c3" namest="c2">
<para>Serial bus controllers</para>
</entry>
</row>
<row>
<entry>
<para>03</para>
</entry>
<entry>
<para>Universal Serial Bus (USB)</para>
</entry>
</row>
<row>
<entry>
<para>04</para>
</entry>
<entry>
<para>Fibre Channel</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
<table frame="all" pgwide="1" xml:id="dbdoclet.50569337_69141">
<title>S2-S3-S4 Definition for Devices/FRUs not Defined in
the PCI Specification</title>
<?dbhtml table-width="75%" ?>
<?dbfo table-width="75%" ?>
<tgroup cols="3">
<colspec colname="c1" colwidth="20*" />
<colspec colname="c2" colwidth="20*" />
<colspec colname="c3" colwidth="60*" />
<thead>
<row>
<entry>
<para>
<emphasis role="bold">Base ClassS2</emphasis>
</para>
</entry>
<entry>
<para>
<emphasis role="bold">Sub-ClassS3-S4</emphasis>
</para>
</entry>
<entry>
<para>
<emphasis role="bold">Description</emphasis>
</para>
</entry>
</row>
</thead>
<tbody>
<row>
<entry morerows="13">
<para>0</para>
</entry>
<entry>
<para>10</para>
</entry>
<entry>
<para>AC Power</para>
</entry>
</row>
<row>
<entry>
<para>11</para>
</entry>
<entry>
<para>DC Power</para>
</entry>
</row>
<row>
<entry>
<para>20</para>
</entry>
<entry>
<para>Temperature Related Problem</para>
</entry>
</row>
<row>
<entry>
<para>21</para>
</entry>
<entry>
<para>Fans</para>
</entry>
</row>
<row>
<entry>
<para>30-3x</para>
</entry>
<entry>
<para>Cables</para>
</entry>
</row>
<row>
<entry>
<para>40-4x</para>
</entry>
<entry>
<para>Terminators</para>
</entry>
</row>
<row>
<entry>
<para>50</para>
</entry>
<entry>
<para>Operator panels</para>
</entry>
</row>
<row>
<entry>
<para>60-6x</para>
</entry>
<entry>
<para>Reserved</para>
</entry>
</row>
<row>
<entry>
<para>70-7x</para>
</entry>
<entry>
<para>Reserved</para>
</entry>
</row>
<row>
<entry>
<para>90-9x</para>
</entry>
<entry>
<para>Reserved</para>
</entry>
</row>
<row>
<entry>
<para>A0</para>
</entry>
<entry>
<para>Boot firmware Heartbeat</para>
</entry>
</row>
<row>
<entry>
<para>B0</para>
</entry>
<entry>
<para>O/S Heartbeat</para>
</entry>
</row>
<row>
<entry>
<para>D0</para>
</entry>
<entry>
<para>Unknown device</para>
</entry>
</row>
<row>
<entry>
<para>E0</para>
</entry>
<entry>
<para>Security</para>
</entry>
</row>
<row>
<entry morerows="13">
<para>1</para>
</entry>
<entry>
<para>A0</para>
</entry>
<entry>
<para>SCSI Drives (generic)</para>
</entry>
</row>
<row>
<entry>
<para>B0</para>
</entry>
<entry>
<para>IDE Drives</para>
</entry>
</row>
<row>
<entry>
<para>C0</para>
</entry>
<entry>
<para>RAID Drives</para>
</entry>
</row>
<row>
<entry>
<para>D0</para>
</entry>
<entry>
<para>SSA Drives</para>
</entry>
</row>
<row>
<entry>
<para>E0</para>
</entry>
<entry>
<para>Tapes SCSI</para>
</entry>
</row>
<row>
<entry>
<para>E1</para>
</entry>
<entry>
<para>Tapes IDE</para>
</entry>
</row>
<row>
<entry>
<para>ED</para>
</entry>
<entry>
<para>SCSI Changer</para>
</entry>
</row>
<row>
<entry>
<para>EE</para>
</entry>
<entry>
<para>Other SCSI Device</para>
</entry>
</row>
<row>
<entry>
<para>EF</para>
</entry>
<entry>
<para>Diskette drive</para>
</entry>
</row>
<row>
<entry>
<para>F0</para>
</entry>
<entry>
<para>CDROM SCSI</para>
</entry>
</row>
<row>
<entry>
<para>F1</para>
</entry>
<entry>
<para>CDROM IDE</para>
</entry>
</row>
<row>
<entry>
<para>F2</para>
</entry>
<entry>
<para>Read/Write Optical SCSI</para>
</entry>
</row>
<row>
<entry>
<para>F3</para>
</entry>
<entry>
<para>Read/Write Optical IDE</para>
</entry>
</row>
<row>
<entry>
<para>F4-FF</para>
</entry>
<entry>
<para>Reserved for other media devices</para>
</entry>
</row>
<row>
<entry morerows="6">
<para>5</para>
</entry>
<entry>
<para>A0</para>
</entry>
<entry>
<para>L2 Cache Controller including integrated SRAM</para>
</entry>
</row>
<row>
<entry>
<para>A1</para>
</entry>
<entry>
<para>L2 Cache SRAM</para>
</entry>
</row>
<row>
<entry>
<para>A8</para>
</entry>
<entry>
<para>NVRAM</para>
</entry>
</row>
<row>
<entry>
<para>A9</para>
</entry>
<entry>
<para>CMOS</para>
</entry>
</row>
<row>
<entry>
<para>AA</para>
</entry>
<entry>
<para>Quartz/EEPROM</para>
</entry>
</row>
<row>
<entry>
<para>B0-Bx</para>
</entry>
<entry>
<para>Memory cards</para>
</entry>
</row>
<row>
<entry>
<para>Cyy</para>
</entry>
<entry>
<para>Memory DIMMs (yy = memory PD bits)</para>
</entry>
</row>
<row>
<entry>
<para>7</para>
</entry>
<entry>
<para>A0</para>
</entry>
<entry>
<para>I<superscript>2</superscript>C bus</para>
</entry>
</row>
<row>
<entry>
<para>8</para>
</entry>
<entry>
<para>A0</para>
</entry>
<entry>
<para>Power Management Functions</para>
</entry>
</row>
<row>
<entry morerows="4">
<para>9</para>
</entry>
<entry>
<para>A0-Ax</para>
</entry>
<entry>
<para>Keyboards</para>
</entry>
</row>
<row>
<entry>
<para>B0-Bx</para>
</entry>
<entry>
<para>Mouse(s)</para>
</entry>
</row>
<row>
<entry>
<para>C0-Cx</para>
</entry>
<entry>
<para>Dials</para>
</entry>
</row>
<row>
<entry>
<para>D0</para>
</entry>
<entry>
<para>Tablet</para>
</entry>
</row>
<row>
<entry>
<para>D1-Dx</para>
</entry>
<entry>
<para>Reserved for other input devices</para>
</entry>
</row>
<row>
<entry>
<para>B</para>
</entry>
<entry>
<para>A0</para>
</entry>
<entry>
<para>Service processor</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
</section>
</chapter>