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diff --git a/docs/hcl/r400.html b/docs/hcl/r400.html new file mode 100644 index 0000000..43dfb09 --- /dev/null +++ b/docs/hcl/r400.html @@ -0,0 +1,101 @@ +<!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 R400</title> +</head> + +<body> + + <div class="section"> + <h1 id="pagetop">ThinkPad R400</h1> + + <p</p> + + <p> + It is believed that all R400 laptops are compatible. + </p> + + <p> + There are two possible flash chip sizes for the R400: 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 R400 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"> + + <h2 id="compatibility_noblobs">Compatibility (without blobs)</h2> + + <p> + Usual limitations apply for native graphics initialization + (no VBT and/or INT10H and only GRUB works so no BIOS, so no DOS/Windows support + - who cares? There is no system but GNU, and Linux is one of it's kernels). + </p> + + <p> + When connecting the AC adapter while system is powered off, system will then power on. + This probably happens in coreboot aswell (with or without blobs). + It's a minor annoyance, but it should be fixed (if it's not already fixed by now). + </p> + + <p> + This method of disabling the ME leaves the flash descriptor and gbe in place (non-functional data, fully documented) + and disables the ME using soft straps. This means that the gigabit ethernet will still work (putting the machine in + non-descriptor mode would wipe it out). + </p> + + <div class="subsection"> + <h3 id="hwvirt">Hardware virtualization (vt-x)</h3> + <p> + The R400, when run without CPU microcode updates in coreboot, currently kernel panics + if running QEMU with vt-x enabled on 2 cores for the guest. With a single core enabled + for the guest, the guest panics (but the host is fine). Working around this in QEMU + might be possible; if not, software virtualization should work fine (it's just slower). + </p> + <p> + The following errata datasheet from Intel might help with investigation: + <a href="http://download.intel.com/design/mobile/specupdt/320121.pdf">http://download.intel.com/design/mobile/specupdt/320121.pdf</a> + </p> + </div> + + </div> + + <div class="section"> + + <p> + Copyright © 2014, 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> |