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20050816	Some success in decoding the way the SGI O2 PROM draws graphics
		during bootup; lines/rectangles and bitmaps work, enough to
		show the bootlogo etc. :-)
		Adding more PPC instructions, and (dummy) BAT registers.
20050817	Updating the pckbc to support scancode type 3 keyboards
		(required in order to interact with the SGI O2 PROM).
		Adding more PPC instructions.
20050818	Adding more ARM instructions; general register forms.
		Importing armreg.h from NetBSD (ARM cpu ids). Adding a (dummy)
		CATS machine mode (using SA110 as the default CPU).
		Continuing on general dyntrans related stuff.
20050819	Register forms for ARM load/stores. Gaah! The Compaq C Compiler
		bug is triggered for ARM loads as well, not just PPC :-(
		Adding full support for ARM PC-relative load/stores, and load/
		stores where the PC register is the destination register.
		Adding support for ARM a.out binaries.
20050820	Continuing to add more ARM instructions, and correcting some
		bugs. Continuing on CATS emulation.
		More work on the PPC stuff.
20050821	Minor PPC and ARM updates. Adding more machine types.
20050822	All ARM "data processing instructions" are now generated
		automatically.
20050824	Beginning the work on the ARM system control coprocessor.
		Adding support for ARM halfword load/stores, and signed loads.
20050825	Fixing an important bug related to the ARM condition codes.
		OpenBSD/zaurus and NetBSD/netwinder now print some boot
		messages. :)
		Adding a dummy SH (Hitachi SuperH) cpu family.
		Beginning to add some ARM virtual address translation.
		MIPS bugfixes: unaligned PC now cause an ADEL exception (at
		least for non-bintrans execution), and ADEL/ADES (not
		TLBL/TLBS) are used if userland tries to access kernel space.
		(Thanks to Joshua Wise for making me aware of these bugs.)
20050827	More work on the ARM emulation, and various other updates.
20050828	More ARM updates.
		Finally taking the time to work on translation invalidation
		(i.e. invalidating translated code mappings when memory is
		written to). Hopefully this doesn't break anything.
20050829	Moving CPU related files from src/ to a new subdir, src/cpus/.
		Moving PROM emulation stuff from src/ to src/promemul/.
		Better debug instruction trace for ARM loads and stores.
20050830	Various ARM updates (correcting CMP flag calculation, etc).
20050831	PPC instruction updates. (Flag fixes, etc.)
20050901	Various minor PPC and ARM instruction emulation updates.
		Minor OpenFirmware emulation updates.
20050903	Adding support for adding arbitrary ARM coprocessors (with
		the i80321 I/O coprocessor as a first test).
		Various other ARM and PPC updates.
20050904	Adding some SHcompact disassembly routines.
20050907	(Re)adding a dummy HPPA CPU module, and a dummy i960 module.
20050908	Began hacking on some Apple Partition Table support.
20050909	Adding support for loading Mach-O (Darwin PPC) binaries.
20050910	Fixing an ARM bug (Carry flag was incorrectly updated for some
		data processing instructions); OpenBSD/cats and NetBSD/
		netwinder get quite a bit further now.
		Applying a patch to dev_wdc, and a one-liner to dev_pcic, to
		make them work better when emulating new versions of OpenBSD.
		(Thanks to Alexander Yurchenko for the patches.)
		Also doing some other minor updates to dev_wdc. (Some cleanup,
		and finally converting to devinit, etc.)
20050912	IRIX doesn't have u_int64_t by default (noticed by Andreas
		<avr@gnulinux.nl>); configure updated to reflect this.
		Working on ARM register bank switching, CPSR vs SPSR issues,
		and beginning the work on interrupt/exception support.
20050913	Various minor ARM updates (speeding up load/store multiple,
		and fixing a ROR bug in R(); NetBSD/cats now boots as far as
		OpenBSD/cats).
20050917	Adding a dummy Atmel AVR (8-bit) cpu family skeleton.
20050918	Various minor updates.
20050919	Symbols are now loaded from Mach-O executables.
		Continuing the work on adding ARM exception support.
20050920	More work on ARM stuff: OpenBSD/cats and NetBSD/cats reach
		userland! :-)
20050921	Some more progress on ARM interrupt specifics.
20050923	Fixing linesize for VR4121 (patch by Yurchenko). Also fixing
		linesizes/cachesizes for some other VR4xxx.
		Adding a dummy Acer Labs M1543 PCI-ISA bridge (for CATS) and a
		dummy Symphony Labs 83C553 bridge (for Netwinder), usable by 
		dev_footbridge.
20050924	Some PPC progress.
20050925	More PPC progress.
20050926	PPC progress (fixing some bugs etc); Darwin's kernel gets
		slightly further than before.
20050928	Various updates: footbridge/ISA/pciide stuff, and finally
		fixing the VGA text scroll-by-changing-the-base-offset bug.
20050930	Adding a dummy S3 ViRGE pci card for CATS emulation, which
		both NetBSD and OpenBSD detects as VGA.
		Continuing on Footbridge (timers, ISA interrupt stuff).
20051001	Continuing... there are still bugs, probably interrupt-
		related.
20051002	More work on the Footbridge (interrupt stuff).
20051003	Various minor updates. (Trying to find the bug(s).)
20051004	Continuing on the ARM stuff.
20051005	More ARM-related fixes.
20051007	FINALLY! Found and fixed 2 ARM bugs: 1 memory related, and the
		other was because of an error in the ARM manual (load multiple
		with the S-bit set should _NOT_ load usermode registers, as the
		manual says, but it should load saved registers, which may or
		may not happen to be usermode registers).
		NetBSD/cats and OpenBSD/cats seem to install fine now :-)
		except for a minor bug at the end of the OpenBSD/cats install.
		Updating the documentation, preparing for the next release.
20051008	Continuing with release testing and cleanup.

1 dpavlin 12 <html><head><title>Gavare's eXperimental Emulator:&nbsp;&nbsp;&nbsp;Introduction</title>
2     <meta name="robots" content="noarchive,nofollow,noindex"></head>
3 dpavlin 4 <body bgcolor="#f8f8f8" text="#000000" link="#4040f0" vlink="#404040" alink="#ff0000">
4     <table border=0 width=100% bgcolor="#d0d0d0"><tr>
5     <td width=100% align=center valign=center><table border=0 width=100%><tr>
6     <td align="left" valign=center bgcolor="#d0efff"><font color="#6060e0" size="6">
7 dpavlin 12 <b>Gavare's eXperimental Emulator:&nbsp;&nbsp;&nbsp;</b></font>
8 dpavlin 4 <font color="#000000" size="6"><b>Introduction</b>
9     </font></td></tr></table></td></tr></table><p>
10 dpavlin 2
11     <!--
12    
13 dpavlin 14 $Id: intro.html,v 1.64 2005/10/07 22:45:33 debug Exp $
14 dpavlin 2
15     Copyright (C) 2003-2005 Anders Gavare. All rights reserved.
16    
17     Redistribution and use in source and binary forms, with or without
18     modification, are permitted provided that the following conditions are met:
19    
20     1. Redistributions of source code must retain the above copyright
21     notice, this list of conditions and the following disclaimer.
22     2. Redistributions in binary form must reproduce the above copyright
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24     documentation and/or other materials provided with the distribution.
25     3. The name of the author may not be used to endorse or promote products
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27    
28     THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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34     OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36     LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37     OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38     SUCH DAMAGE.
39    
40     -->
41    
42     <a href="./">Back to the index</a>
43    
44     <p><br>
45     <h2>Introduction</h2>
46    
47     <p>
48     <ul>
49     <li><a href="#overview">Overview</a>
50 dpavlin 4 <li><a href="#free">Is GXemul Free software?</a>
51 dpavlin 2 <li><a href="#build">How to compile/build the emulator</a>
52 dpavlin 6 <li><a href="#run">How to run the emulator</a>
53 dpavlin 2 <li><a href="#cpus">Which CPU types does GXemul emulate?</a>
54     <li><a href="#accuracy">Emulation accuracy</a>
55     <li><a href="#emulmodes">Which machines does GXemul emulate?</a>
56 dpavlin 10 <li><a href="#guestos">Which guest OSes are possible to run in GXemul?</a>
57 dpavlin 2 </ul>
58    
59    
60    
61    
62    
63     <p><br>
64     <a name="overview"></a>
65     <h3>Overview:</h3>
66    
67 dpavlin 14 GXemul is an experimental instruction-level machine emulator. Several
68     emulation modes are available. In some modes, processors and surrounding
69     hardware components are emulated well enough to let unmodified operating
70     systems (e.g. NetBSD) run as if they were running on a real machine.
71 dpavlin 2
72 dpavlin 14 <p>The processor architecture best emulated by GXemul is MIPS, but other
73     architectures are also partially emulated.
74 dpavlin 12
75 dpavlin 10 <p>Devices and CPUs are not simulated with 100% accuracy. They are only
76     ``faked'' well enough to make operating systems (e.g. NetBSD) run without
77 dpavlin 6 complaining too much. Still, the emulator could be of interest for
78     academic research and experiments, such as when learning how to write
79 dpavlin 4 operating system code.
80 dpavlin 2
81 dpavlin 10 <p>The emulator is written in C, does not depend on external libraries
82     (except X11, but that is optional), and should compile and run on most
83 dpavlin 12 Unix-like systems. If it doesn't, then that is a bug.
84 dpavlin 2
85 dpavlin 10 <p>The emulator contains code which tries to emulate the workings of CPUs
86     and surrounding hardware found in real machines, but it does not contain
87     any ROM code. You will need some form of program (in binary form) to run
88     in the emulator. For many emulation modes, PROM calls are handled by the
89 dpavlin 2 emulator itself, so you do not need to use any ROM image at all.
90    
91 dpavlin 10 <p>You can use pre-compiled kernels (for example NetBSD kernels, or
92     Linux), or other programs that are in binary format, and in some cases
93     even actual ROM images. A couple of different file formats are supported
94     (ELF, a.out, ECOFF, SREC, and raw binaries).
95 dpavlin 2
96 dpavlin 10 <p>If you do not have a kernel as a separate file, but you have a bootable
97 dpavlin 6 disk image, then it is sometimes possible to boot directly from that
98     image. (This works for example with DECstation emulation, or when booting
99     from ISO9660 CDROM images.)
100 dpavlin 2
101    
102    
103    
104 dpavlin 6
105    
106 dpavlin 10
107    
108 dpavlin 2 <p><br>
109     <a name="free"></a>
110 dpavlin 4 <h3>Is GXemul Free software?</h3>
111 dpavlin 2
112 dpavlin 6 Yes. I have released GXemul under a Free license. The code in GXemul is
113     Copyrighted software, it is <i>not</i> public domain. (If this is
114     confusing to you, you might want to read up on the definitions of the
115     four freedoms associated with Free software, <a
116     href="http://www.gnu.org/philosophy/free-sw.html">http://www.gnu.org/philosophy/free-sw.html</a>.)
117 dpavlin 2
118 dpavlin 12 <p>The code I have written is released under a 3-clause BSD-style license
119     (or "revised BSD-style" if one wants to use <a
120     href="http://www.gnu.org/philosophy/bsd.html">GNU jargon</a>). Apart from
121     the code I have written, some files are copied from other sources such as
122     NetBSD, for example header files containing symbolic names of bitfields in
123     device registers. They are also covered by similar licenses, but with some
124     additional clauses. The main point, however, is that the licenses require
125     that the original Copyright and license terms are included when you make a
126     copy or modification.
127 dpavlin 2
128 dpavlin 12 <p>If you plan to redistribute GXemul <i>without</i> supplying the source
129     code, then you need to comply with each individual source file some other
130     way, for example by writing additional documentation containing copyright
131     notes. I have not done this, since I do not plan on making distributions
132     without source code. You need to check all individual files for details.
133     The "easiest way out" if you plan to redistribute code from GXemul is, of
134     course, to let it remain open source and simply supply the source code.
135 dpavlin 2
136 dpavlin 14 <p>(If a stable, unmodified release of GXemul is packaged into binary form,
137     and it is clear which version of GXemul was used to build the package,
138     then it can be argued that the source code is available, just not in that
139     specific package. Common sense should be used in this case, and not
140     pedanticism.)
141 dpavlin 2
142    
143    
144    
145 dpavlin 12
146    
147 dpavlin 2 <p><br>
148     <a name="build"></a>
149     <h3>How to compile/build the emulator:</h3>
150    
151     Uncompress the .tar.gz distribution file, and run
152     <pre>
153     $ <b>./configure</b>
154     $ <b>make</b>
155     </pre>
156    
157 dpavlin 12 <p>This should work on most Unix-like systems. If it doesn't, then
158 dpavlin 2 mail me a bug report.
159    
160 dpavlin 12 <p>The emulator's performance is highly dependent on both runtime settings
161 dpavlin 2 and on compiler settings, so you might want to experiment with different
162 dpavlin 12 CC and CFLAGS environment variable values. For example, on a modern PC,
163 dpavlin 2 you could try the following:
164 dpavlin 12 <p><pre>
165     $ <b>CFLAGS="-mcpu=pentium4 -O3" ./configure</b>
166     $ <b>make</b>
167 dpavlin 2 </pre>
168    
169    
170 dpavlin 6
171    
172    
173    
174    
175     <p><br>
176     <a name="run"></a>
177     <h3>How to run the emulator:</h3>
178    
179     Once you have built GXemul, running it should be rather straight-forward.
180     Running <tt><b>gxemul</b></tt> without arguments (or with the
181     <b><tt>-h</tt></b> or <b><tt>-H</tt></b> command line options) will
182     display a help message.
183    
184 dpavlin 2 <p>
185 dpavlin 6 To get some ideas about what is possible to run in the emulator, please
186     read the section about <a href="guestoses.html">installing "guest"
187     operating systems</a>. If you are interested in using the emulator to
188     develop code on your own, then you should also read the section about
189     <a href="experiments.html#hello">Hello World</a>.
190    
191     <p>
192 dpavlin 2 To exit the emulator, type CTRL-C to enter the
193 dpavlin 6 single-step debugger, and then type <tt><b>quit</b></tt>.
194 dpavlin 2
195 dpavlin 4 <p>
196     If you are starting an emulation by entering settings directly on the
197 dpavlin 6 command line, and you are not using the <tt><b>-x</b></tt> option, then all
198 dpavlin 4 terminal input and output will go to the main controlling terminal.
199     CTRL-C is used to break into the debugger, so in order to send CTRL-C to
200     the running (emulated) program, you may use CTRL-B.
201 dpavlin 6 (This should be a reasonable compromise to allow the emulator to be usable
202     even on systems without X Windows.)
203 dpavlin 2
204 dpavlin 4 <p>
205 dpavlin 6 There is no way to send an actual CTRL-B to the emulated program, when
206     typing in the main controlling terminal window. The solution is to either
207     use <a href="configfiles.html">configuration files</a>, or use
208     <tt><b>-x</b></tt>. Both these solutions cause new xterms to be opened for
209     each emulated serial port that is written to. CTRL-B and CTRL-C both have
210     their original meaning in those xterm windows.
211 dpavlin 2
212    
213    
214    
215 dpavlin 4
216 dpavlin 2 <p><br>
217     <a name="cpus"></a>
218     <h3>Which CPU types does GXemul emulate?</h3>
219    
220     <h4>MIPS:</h4>
221    
222 dpavlin 6 Emulation of R4000, which is a 64-bit CPU, was my initial goal.
223     R2000/R3000-like CPUs (32-bit), R1x000, and generic MIPS32/MIPS64-style
224     CPUs are also emulated, and are hopefully almost as stable as the R4000
225     emulation.
226 dpavlin 2
227 dpavlin 12 <p>I have written an experimental dynamic binary translation subsystem.
228 dpavlin 2 This gives higher total performance than interpreting one instruction at a
229 dpavlin 12 time and executing it. (If you wish to disable bintrans, add <b>-B</b> to
230     the command line.)
231 dpavlin 2
232 dpavlin 14 <h4>ARM:</h4>
233 dpavlin 2
234 dpavlin 14 The ARM CPU emulation is good enough to run NetBSD/cats and OpenBSD/cats
235     (almost bugfree :-), but it is not as tested or fine-tuned as the MIPS
236     emulation.
237    
238 dpavlin 10 <h4>Other CPU types:</h4>
239 dpavlin 2
240 dpavlin 10 Some other CPU architectures can also be partially emulated. These are not
241     working well enough yet to run guest operating systems.
242 dpavlin 2
243 dpavlin 6
244 dpavlin 2
245    
246    
247    
248     <p><br>
249     <a name="accuracy"></a>
250     <h3>Emulation accuracy:</h3>
251    
252 dpavlin 6 GXemul is an instruction-level emulator; things that would happen in
253 dpavlin 2 several steps within a real CPU are not taken into account (eg. pipe-line
254 dpavlin 6 stalls or out-of-order execution). Still, instruction-level accuracy seems
255     to be enough to be able to run complete guest operating systems inside the
256 dpavlin 2 emulator.
257    
258 dpavlin 12 <p>Caches are by default not emulated. In some cases, the existance of
259     caches is "faked" to let operating systems think that they are there.
260     (There is some old code for R2000/R3000 caches, but it has probably
261     suffered from bitrot by now.)
262 dpavlin 2
263 dpavlin 12 <p>The emulator is <i>not</i> timing-accurate. It can be run in a
264     "deterministic" mode, <tt><b>-D</b></tt>. The meaning of deterministic is
265     simply that running two emulations with the same settings will result in
266     identical runs. Obviously, this requires that no user interaction is
267     taking place, and that clock speeds are fixed with the <tt><b>-I</b></tt>
268     option. (Deterministic in this case does <i>not</i> mean that the
269     emulation will be identical to some actual real-world machine.)
270 dpavlin 2
271    
272    
273 dpavlin 6
274    
275 dpavlin 2 <p><br>
276     <a name="emulmodes"></a>
277     <h3>Which machines does GXemul emulate?</h3>
278    
279 dpavlin 4 A few different machine types are emulated. The following machine types
280     are emulated well enough to run at least one "guest OS":
281 dpavlin 2
282     <p>
283     <ul>
284 dpavlin 14 <li><b><u>MIPS</u></b>
285     <ul>
286     <li><b>DECstation 5000/200</b>&nbsp;&nbsp;("3max")
287 dpavlin 4 <br>Serial controller (including keyboard and mouse), ethernet,
288     SCSI, and graphical framebuffers.
289 dpavlin 14 <p>
290     <li><b>Acer Pica-61</b>&nbsp;&nbsp;(an ARC machine)
291 dpavlin 4 <br>Serial controller, "VGA" text console, and SCSI.
292 dpavlin 14 <p>
293     <li><b>NEC MobilePro 770, 780, 800, and 880</b>&nbsp;&nbsp;(HPCmips machines)
294 dpavlin 4 <br>Framebuffer, keyboard, and a PCMCIA IDE controller.
295 dpavlin 14 <p>
296     <li><b>Cobalt</b>
297 dpavlin 4 <br>Serial controller and PCI IDE.
298 dpavlin 14 <p>
299     <li><b>Malta (evbmips)</b>
300 dpavlin 10 <br>Serial controller and PCI IDE.
301 dpavlin 14 <p>
302     <li><b>SGI O2 ("IP32")</b>
303 dpavlin 10 <br>Serial controller and ethernet.&nbsp;&nbsp;<small>(Enough for
304     root-on-nfs, but not for disk boot.)</small>
305 dpavlin 14 </ul>
306     <p>
307     <li><b><u>ARM</u></b>
308     <ul>
309     <li><b>CATS</b>
310     <br>VGA and PCI IDE.
311     </ul>
312 dpavlin 2 </ul>
313    
314 dpavlin 10 <p>There is code in GXemul for emulation of many other machine types; the
315     degree to which these work range from almost being able to run a complete
316     OS, to almost completely unsupported (perhaps just enough support to
317     output a few boot messages via serial console).
318 dpavlin 2
319 dpavlin 10 <p>In addition to emulating real machines, there is also a "test-machine".
320     A test-machine consists of one or more CPUs and a few experimental devices
321     such as:
322 dpavlin 2
323     <p>
324     <ul>
325     <li>a console I/O device (putchar() and getchar()...)
326     <li>an inter-processor communication device, for SMP experiments
327     <li>a very simple linear framebuffer device (for graphics output)
328 dpavlin 12 <li>a simple SCSI disk controller
329     <li>a simple ethernet controller
330 dpavlin 2 </ul>
331    
332 dpavlin 10 <p>This mode is useful if you wish to run experimental code, but do not
333 dpavlin 2 wish to target any specific real-world machine type, for example for
334     educational purposes.
335    
336 dpavlin 10 <p>You can read more about these experimental devices <a
337     href="experiments.html#expdevices">here</a>.
338 dpavlin 2
339    
340    
341    
342    
343    
344    
345     <p><br>
346     <a name="guestos"></a>
347 dpavlin 10 <h3>Which guest OSes are possible to run in GXemul?</h3>
348 dpavlin 2
349 dpavlin 4 This table lists the guest OSes that run well enough to be considered
350 dpavlin 2 working in the emulator. They can boot from a harddisk image and be
351 dpavlin 4 interacted with similar to a real machine.
352 dpavlin 2
353 dpavlin 4 <p>
354     <center><table border="0">
355     <tr>
356     <td width="10"></td>
357 dpavlin 6 <td align="center"><a href="20050317-example.png"><img src="20050317-example_small.png"></a></td>
358 dpavlin 4 <td width="15"></td>
359     <td><a href="http://www.netbsd.org/Ports/pmax/">NetBSD/pmax</a>
360     <br>DECstation 5000/200</td>
361     <td width="30"></td>
362     <td align="center"><a href="20041024-netbsd-arc-installed.gif"><img src="20041024-netbsd-arc-installed_small.gif"></a></td>
363     <td width="15"></td>
364     <td><a href="http://www.netbsd.org/Ports/arc/">NetBSD/arc</a>
365     <br>Acer Pica-61</td>
366 dpavlin 2
367 dpavlin 4 </tr>
368 dpavlin 2
369 dpavlin 4 <tr><td height="10"></td></tr>
370 dpavlin 2
371 dpavlin 4 <tr>
372     <td></td>
373     <td align="center"><a href="openbsd-pmax-20040710.png"><img src="openbsd-pmax-20040710_small.png"></a></td>
374     <td></td>
375     <td><a href="http://www.openbsd.org/pmax.html">OpenBSD/pmax</a>
376     <br>DECstation 5000/200</td>
377     <td></td>
378     <td align="center"><a href="20041024-openbsd-arc-installed.gif"><img src="20041024-openbsd-arc-installed_small.gif"></a></td>
379     <td></td>
380     <td><a href="http://www.openbsd.org/arc.html">OpenBSD/arc</a>
381     <br>Acer Pica-61</td>
382     </tr>
383 dpavlin 2
384 dpavlin 4 <tr><td height="10"></td></tr>
385 dpavlin 2
386 dpavlin 4 <tr>
387     <td></td>
388     <td align="center"><a href="ultrix4.5-20040706.png"><img src="ultrix4.5-20040706_small.gif"></a></td>
389     <td></td>
390     <td>Ultrix/RISC<br>DECstation 5000/200</td>
391     <td></td>
392     <td align="center"><a href="20041213-debian_4.png"><img src="20041213-debian_4_small.gif"></a></td>
393     <td></td>
394     <td><a href="http://www.debian.org/">Debian&nbsp;GNU/Linux</a>&nbsp;<super>*</super>
395     <br>DECstation 5000/200</td>
396     </tr>
397 dpavlin 2
398 dpavlin 4 <tr><td height="10"></td></tr>
399 dpavlin 2
400 dpavlin 4 <tr>
401     <td></td>
402     <td align="center"><a href="sprite-20040711.png"><img src="sprite-20040711_small.png"></a></td>
403     <td></td>
404     <td><a href="http://www.cs.berkeley.edu/projects/sprite/retrospective.html">Sprite</a>
405     <br>DECstation 5000/200</td>
406     <td></td>
407     <td align="center"><a href="20041129-redhat_mips.png"><img src="20041129-redhat_mips_small.png"></a></td>
408     <td></td>
409     <td>Redhat&nbsp;Linux&nbsp;<super>*</super>
410     <br>DECstation 5000/200</td>
411     </tr>
412 dpavlin 2
413 dpavlin 4 <tr><td height="10"></td></tr>
414 dpavlin 2
415 dpavlin 4 <tr>
416     <td></td>
417     <td align="center"><a href="20050427-netbsd-hpcmips-2.png"><img src="20050427-netbsd-hpcmips-2_small.png"></a></td>
418     <td></td>
419     <td><a href="http://www.netbsd.org/Ports/hpcmips/">NetBSD/hpcmips</a>
420     <br>NEC MobilePro 770, 780, 800, 880</td>
421     <td></td>
422     <td align="center"><a href="20050413-netbsd-cobalt.png"><img src="20050413-netbsd-cobalt_small.png"></a></td>
423     <td></td>
424     <td><a href="http://www.netbsd.org/Ports/cobalt/">NetBSD/cobalt</a>
425     <br>Cobalt</td>
426     </tr>
427 dpavlin 2
428 dpavlin 10 <tr><td height="10"></td></tr>
429    
430     <tr>
431     <td></td>
432     <td align="center"><a href="20050626-netbsd-sgimips-netboot.png"><img src="20050626-netbsd-sgimips-netboot_small.png"></a></td>
433     <td></td>
434     <td><a href="http://www.netbsd.org/Ports/sgimips/">NetBSD/sgimips</a>
435     <br>SGI O2 ("IP32")</td>
436     <td></td>
437     <td align="center"><a href="20050622-netbsd-evbmips-malta.png"><img src="20050622-netbsd-evbmips-malta_small.png"></a></td>
438     <td></td>
439     <td><a href="http://www.netbsd.org/Ports/evbmips/">NetBSD/evbmips</a>
440     <br>5Kc (and 4Kc) Malta<br>evaluation boards</td>
441     <td></td>
442     </tr>
443    
444 dpavlin 14 <tr><td height="10"></td></tr>
445    
446     <tr>
447     <td></td>
448     <td align="center"><a href="20051007-netbsd-cats-installed.png"><img src="20051007-netbsd-cats-installed_small.png"></a></td>
449     <td></td>
450     <td><a href="http://www.netbsd.org/Ports/cats/">NetBSD/cats</a>
451     <br>CATS</td>
452     <td></td>
453     <td align="center"><a href="20051007-openbsd-cats-installed.png"><img src="20051007-openbsd-cats-installed_small.png"></a></td>
454     <td></td>
455     <td><a href="http://www.openbsd.org/cats.html">OpenBSD/cats</a>
456     <br>CATS</td>
457     <td></td>
458     </tr>
459    
460 dpavlin 4 </table></center>
461 dpavlin 2
462    
463 dpavlin 4 <p><br>
464 dpavlin 2
465 dpavlin 4 <super>*</super> Although Linux runs under DECstation emulation, the
466     default 2.4.27 kernel in Debian GNU/Linux does not support keyboards on
467     the 5000/200 (the specific DECstation model being emulated), so when the
468     login prompt is reached you cannot interact with the system. Kaj-Michael
469     Lang has compiled and made available a newer kernel from the current
470     mips-linux development tree. You can find it here: <a
471     href="http://home.tal.org/~milang/o2/kernels/">http://home.tal.org/~milang/o2/kernels</a>/<a
472     href="http://home.tal.org/~milang/o2/kernels/vmlinux-2.4.29-rc2-r3k-mipsel-decstation">vmlinux-2.4.29-rc2-r3k-mipsel-decstation</a>
473     This newer kernel supports keyboard input, but it does not have Debian's
474     ethernet patches, so you will not be able to use keyboard/framebuffer
475     <i>and</i> networking at the same time.
476 dpavlin 2
477    
478     </body>
479     </html>

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