1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
---
title: ASUS KCMA-D8 desktop/workstation board
...
This is a desktop board using AMD hardware (Fam10h *and Fam15h* CPUs
available). It can also be used for building a high-powered workstation.
Powered by libreboot. The coreboot port was done by Timothy Pearson of
Raptor Engineering Inc. and, working with them, merged into libreboot.
*Memory initialization is still problematic, for some modules. We
recommend avoiding Kingston modules.*
Flashing instructions can be found at
[../install/\#flashrom](../install/#flashrom) - note that external
flashing is required (e.g. BBB), if the proprietary (ASUS) firmware is
currently installed. If you already have libreboot, by default it is
possible to re-flash using software running in GNU+Linux on the kcma-d8,
without using external hardware.
CPU compatibility
=================
*Use Opteron 4200 series (works without microcode updates, including hw
virt).* 4300 series needs microcode updates, so avoid those CPUs. 4100
series is too old, and mostly untested.
Board status (compatibility) {#boardstatus}
============================
See <https://raptorengineeringinc.com/coreboot/kcma-d8-status.php>.
Form factor {#formfactor}
===========
This board is ATX form factor. While the [ATX standard, version 2.2](https://web.archive.org/web/20120725150314/http://www.formfactors.org/developer/specs/atx2_2.pdf)
specifies board dimensions 305mm x 244mm, this board measures 305mm x 253mm;
ensure your case supports this extra ~centimeter in width.
IPMI iKVM module add-on {#ipmi}
=======================
Don't use it. It uses proprietary firmware and adds a backdoor (remote
out-of-band management chip, similar to the [Intel Management
Engine](../../faq.md#intelme). Fortunately, the firmware is
unsigned (possibly to replace) and physically separate from the
mainboard since it's on the add-on module, which you don't have to
install.
Flash chips {#flashchips}
===========
2MiB flash chips are included by default, on these boards. It's on a
P-DIP 8 slot (SPI chip). The flash chip can be upgraded to higher sizes:
4MiB, 8MiB or 16MiB. With at least 8MiB, you could feasibly fit a
compressed linux+initramfs image (BusyBox+Linux system) into CBFS and
boot that, loading it into memory.
Libreboot has configs for 2, 4, 8 and 16 MiB flash chip sizes (default
flash chip is 2MiB).
*DO NOT hot-swap the chip with your bare hands. Use a P-DIP 8 chip
extractor. These can be found online. See
<http://www.coreboot.org/Developer_Manual/Tools#Chip_removal_tools>*
Native graphics initialization {#graphics}
==============================
Only text-mode is known to work, but linux(kernel) can initialize the
framebuffer display (if it has KMS - kernel mode setting).
Current issues {#issues}
==============
- LRDIMM memory modules are currently incompatible
- SAS (via PIKE 2008 module) requires non-free option ROM (and
SeaBIOS) to boot from it (theoretically possible to replace, but you
can put a kernel in CBFS or on SATA and use that to boot GNU, which
can be on a SAS drive. The linux kernel can use those SAS drives
(via PIKE module) without an option ROM).
- IPMI iKVM module (optional add-on card) uses proprietary firmware.
Since it's for remote out-of-band management, it's theoretically a
backdoor similar to the Intel Management Engine. Fortunately, unlike
the ME, this firmware is unsigned which means that a free
replacement is theoretically possible. For now, the libreboot
project recommends not installing the module. [This
project](https://github.com/facebook/openbmc) might be interesting
to derive from, for those who want to work on a free replacement. In
practise, out-of-band management isn't very useful anyway (or at
the very least, it's not a major inconvenience to not have it).
- Graphics: only text-mode works. See [\#graphics](#graphics)
Hardware specifications {#specifications}
-----------------------
Check the ASUS website.
Copyright © 2016 Leah Rowe <info@minifree.org>\
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License Version 1.3 or any later
version published by the Free Software Foundation
with no Invariant Sections, no Front Cover Texts, and no Back Cover Texts.
A copy of this license is found in [../fdl-1.3.md](../fdl-1.3.md)
|
