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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style type="text/css">
@import url('../css/main.css');
</style>
<title>ThinkPad T500</title>
</head>
<body>
<div class="section">
<h1 id="pagetop">ThinkPad T500</h1>
<p>
It is believed that all or most T500 laptops are compatible.
See notes about <a href="../install/t500_external.html#cpu_compatibility">CPU compatibility</a>
for potential incompatibilities.
</p>
<p>
There are two possible flash chip sizes for the T500: 4MiB (32Mbit) or 8MiB (64Mbit).
This can be identified by the type of flash chip below the palmrest: 4MiB is SOIC-8, 8MiB
is SOIC-16.
</p>
<p>
<b>The T500 laptops come with the ME (and sometimes AMT in addition) before flashing libreboot. Libreboot disables and removes it
by using a modified descriptor: see <a href="gm45_remove_me.html">gm45_remove_me.html</a></b> (contains notes, plus
instructions)
</p>
<p>
Flashing instructions can be found at <a href="../install/index.html#flashrom">../install/index.html#flashrom</a>
</p>
<p>
<a href="index.html">Back to previous index</a>.
</p>
</div>
<div class="section">
<p>
The T500 is almost identical to the X200, code-wise. See <a href="x200.html">x200.html</a>.
</p>
</div>
<div class="section">
<h2 id="descriptor_difference">
Descriptor and Gbe differences
</h2>
<p>
See
<a href="../future/dumps/t500_x200_descriptor/descriptor_diff_t500_x200.txt">../future/dumps/t500_x200_descriptor/descriptor_diff_t500_x200.txt</a>
and
<a href="../future/dumps/t500_x200_descriptor/gbe_diff_t500_x200.txt">../future/dumps/t500_x200_descriptor/gbe_diff_t500_x200.txt</a>
</p>
<p>
The patches above are based on the output from ich9deblob on a factory.rom image dumped from the T500
with a SOIC-8 4MiB flash chip. The patch re-creates the X200 descriptor/gbe source, so the commands were
something like:<br/>
$ <b>diff -u t500gbe x200gbe</b><br/>
$ <b>diff -u t500descriptor x200descriptor</b>
</p>
<p>
ME VSCC table is in a different place and a different size on the T500. Libreboot disables and removes the ME
anyway, so it doesn't matter.
</p>
<p>
The very same descriptor/gbe used on the X200 (generated by <a href="gm45_remove_me.html#ich9gen">ich9gen</a>)
was re-used on the T500, and it still worked.
</p>
</div>
<div class="section">
<h2 id="regdumps">Hardware register dumps</h2>
<p>
The coreboot wiki <a href="http://www.coreboot.org/Motherboard_Porting_Guide">shows</a>
how to collect various logs useful in porting to new
boards. Following are outputs from the T500:
</p>
<ul>
<li>
T500 with <b>Macronix MX25L3205D</b> flash chip (4MiB, SOIC-8)
and Lenovo BIOS 3.13 7VET83WW (EC firmware 1.06):
<ul>
<li>lspci <a href="../future/dumps/t500log/lspci.log">output</a></li>
<li>lsusb <a href="../future/dumps/t500log/lsusb.log">output</a></li>
<li>lspnp <a href="../future/dumps/t500log/lspnp.log">output</a></li>
<li>superiotool <a href="../future/dumps/t500log/superiotool.log">output</a></li>
<li>inteltool <a href="../future/dumps/t500log/inteltool.log">output</a></li>
<li>ectool <a href="../future/dumps/t500log/ectool.log">output</a></li>
<li>msrtool <a href="../future/dumps/t500log/msrtool.log">output</a></li>
<li>dmidecode <a href="../future/dumps/t500log/dmidecode.log">output</a></li>
<li>biosdecode <a href="../future/dumps/t500log/biosdecode.log">output</a></li>
<li>nvramtool <a href="../future/dumps/t500log/nvramtool.log">output</a></li>
<li><a href="../future/dumps/t500log/dmesg.log">dmesg</a></li>
<li>from stock firmware - flashrom probe <a href="../future/dumps/t500log/flashrom_info.log">output</a>,
<li>from stock firmware - flashrom read (failed): <a href="../future/dumps/t500log/flashrom_read.log">output</a>,
<li>from stock firmware - flashrom write (failed): <a href="../future/dumps/t500log/flashrom_write.log">flashrom_write.log</a></li>
<li><a href="../future/dumps/t500log/pin_hwC0D0">/sys/class/sound/card0/hwC0D0/init_pin_configs</a></li>
<li><a href="../future/dumps/t500log/codec%230">/proc/asound/card0/codec#0</a></li>
<li><a href="../future/dumps/t500log/cpuinfo.log">/proc/cpuinfo</a></li>
</ul>
</li>
</ul>
<p>
This one had a screen (1920x1200) that is currently incompatible. Working to fix it. EDID:
</p>
<pre>
user@user-ThinkPad-T500:~/Desktop$ sudo i2cdump -y 2 0x50
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: XX ff ff ff ff ff ff 00 30 ae 55 40 00 00 00 00 X.......0?U@....
10: 00 11 01 03 80 21 15 78 ea ba 70 98 59 52 8c 28 .????!?x??p?YR?(
20: 25 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01 %PT...??????????
30: 01 01 01 01 01 01 e7 3a 80 8c 70 b0 14 40 1e 50 ???????:??p??@?P
40: 24 00 4b cf 10 00 00 19 16 31 80 8c 70 b0 14 40 $.K??..??1??p??@
50: 1e 50 24 00 4b cf 10 00 00 19 00 00 00 0f 00 d1 ?P$.K??..?...?.?
60: 0a 32 d1 0a 28 11 01 00 32 0c 00 00 00 00 00 fe ?2??(??.2?.....?
70: 00 4c 50 31 35 34 57 55 31 2d 54 4c 42 31 00 9a .LP154WU1-TLB1.?
80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
</pre>
</div>
<div class="section">
<p>
Copyright © 2015 Francis Rowe <info@gluglug.org.uk><br/>
This document is released under the Creative Commons Attribution-ShareAlike 4.0 International Public License and all future versions.
A copy of the license can be found at <a href="../license.txt">../license.txt</a>.
</p>
<p>
This document is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See <a href="../license.txt">../license.txt</a> for more information.
</p>
</div>
</body>
</html>
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