/[gxemul]/trunk/doc/intro.html

This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!

Diff of /trunk/doc/intro.html

Parent Directory | Revision Log | View Patch Patch

-revision 2 by dpavlin,
Mon Oct  8 16:17:48 2007 UTC
+revision 12 by dpavlin,
Mon Oct  8 16:18:38 2007 UTC
 Line 1
- <html>
+ <html><head><title>Gavare's eXperimental Emulator:&nbsp;&nbsp;&nbsp;Introduction</title>
- <head><title>GXemul documentation: Introduction</title>
+ <meta name="robots" content="noarchive,nofollow,noindex"></head>
- </head>
+ <body bgcolor="#f8f8f8" text="#000000" link="#4040f0" vlink="#404040" alink="#ff0000">
- <body bgcolor="#ffffff" text="#000000" link="#4040f0" vlink="#404040" alink="#ff0000">
+ <table border=0 width=100% bgcolor="#d0d0d0"><tr>
- <p>
+ <td width=100% align=center valign=center><table border=0 width=100%><tr>
- <table width="100%">
+ <td align="left" valign=center bgcolor="#d0efff"><font color="#6060e0" size="6">
-   <tr><td width="100%" bgcolor="#808070"><font color="#ffffe0" size="6">
+ <b>Gavare's eXperimental Emulator:&nbsp;&nbsp;&nbsp;</b></font>
-   <b>GXemul documentation: Introduction</b></font></td></tr>
+ <font color="#000000" size="6"><b>Introduction</b>
- </table>
+ </font></td></tr></table></td></tr></table><p>
- <p>
- <!-- The first 10 lines are cut away by the homepage updating script.  -->
  <!--
- $Id: intro.html,v 1.30 2005/04/07 15:43:15 debug Exp $
+ $Id: intro.html,v 1.61 2005/08/16 05:15:24 debug Exp $
  Copyright (C) 2003-2005  Anders Gavare.  All rights reserved.
-Line 50 
 SUCH DAMAGE.
+Line 47 
 SUCH DAMAGE.
  <p>
  <ul>
    <li><a href="#overview">Overview</a>
-   <li><a href="#free">Is GXemul free software?</a>
+   <li><a href="#free">Is GXemul Free software?</a>
    <li><a href="#build">How to compile/build the emulator</a>
+   <li><a href="#run">How to run the emulator</a>
    <li><a href="#cpus">Which CPU types does GXemul emulate?</a>
    <li><a href="#accuracy">Emulation accuracy</a>
    <li><a href="#emulmodes">Which machines does GXemul emulate?</a>
-   <li><a href="#guestos">Which guest OSes are possible to run?</a>
+   <li><a href="#guestos">Which guest OSes are possible to run in GXemul?</a>
  </ul>
-Line 66 
 SUCH DAMAGE.
+Line 64 
 SUCH DAMAGE.
  <a name="overview"></a>
  <h3>Overview:</h3>
- GXemul is a machine emulator, which can be used to experiment with
+ GXemul is an experimental instruction-level machine emulator. It can be
- binary code for (among others) MIPS-based machines. Several emulation
+ used to run binary code for MIPS-based machines, regardless of host
- modes are available. For some emulation modes, processors and surrounding
+ platform. Several emulation modes are available. For some modes,
- hardware components are emulated well enough to let unmodified operating
+ processors and surrounding hardware components are emulated well enough to
- systems run as if they were running on a real machine.
+ let unmodified operating systems run as if they were running on a real
+ machine.
+ <p>(Non-MIPS emulation modes are also under development, but so far none
+ of those modes has reached the completeness required to run unmodified
+ operating systems.)
+ <p>Devices and CPUs are not simulated with 100% accuracy. They are only
+ ``faked'' well enough to make operating systems (e.g. NetBSD) run without
+ complaining too much. Still, the emulator could be of interest for
+ academic research and experiments, such as when learning how to write
+ operating system code.
+ <p>The emulator is written in C, does not depend on external libraries
+ (except X11, but that is optional), and should compile and run on most
+ Unix-like systems. If it doesn't, then that is a bug.
+ <p>The emulator contains code which tries to emulate the workings of CPUs
+ and surrounding hardware found in real machines, but it does not contain
+ any ROM code. You will need some form of program (in binary form) to run
+ in the emulator. For many emulation modes, PROM calls are handled by the
+ emulator itself, so you do not need to use any ROM image at all.
- <p>
+ <p>You can use pre-compiled kernels (for example NetBSD kernels, or
- It is important to keep in mind that devices and CPUs are not really
+ Linux), or other programs that are in binary format, and in some cases
- emulated correctly, they are only "faked" well enough to make eg. NetBSD
+ even actual ROM images. A couple of different file formats are supported
- run. Still, the emulator could be of interest for academic research and
+ (ELF, a.out, ECOFF, SREC, and raw binaries).
- experiments, such as when learning how to write an OS for a real machine,
- or profiling SMP, memory, or system call usage.
+ <p>If you do not have a kernel as a separate file, but you have a bootable
+ disk image, then it is sometimes possible to boot directly from that
+ image. (This works for example with DECstation emulation, or when booting
+ from ISO9660 CDROM images.)
- <p>
- The emulator is written in C, does not depend on external libraries (except
- X11, but that is optional), and should compile and run on most Unix-like
- systems. If it doesn't, then that is a bug.
- <p>
- The emulator contains code which tries to emulate the workings of CPUs and
- surrounding hardware found in real machines, but it does not contain any
- ROM code. You will need some form of program (in binary form) to run in
- the emulator. For many emulation modes, PROM calls are handled by the
- emulator itself, so you do not need to use any ROM image at all.
- <p>
- You can use pre-compiled kernels (for example NetBSD kernels, or Linux),
- or other programs that are in binary format, and in some cases even actual
- ROM images. A couple of different file formats are supported (ELF, a.out,
- ECOFF, SREC, raw binaries).
- <p>
- (You do not need any MIPS compiler toolchain to build or use GXemul.
- If you need to compile MIPS binaries from sources, then of course you need
- such a toolchain, but that is completely separate from GXemul. There
- is a <a href="technical.html#regtest">regression testing</a> framework,
- which requires that a GNU CC for mips64-unknown-elf or similar is available.
- For simply building and using the emulator, it is not required.)
-Line 111 
 For simply building and using the emulat
+Line 110 
 For simply building and using the emulat
  <p><br>
  <a name="free"></a>
- <h3>Is GXemul free software?</h3>
+ <h3>Is GXemul Free software?</h3>
- Yes. I have released GXemul under a free license.
+ Yes. I have released GXemul under a Free license. The code in GXemul is
- (For a definitions of the four freedoms associated with free software,
+ Copyrighted software, it is <i>not</i> public domain. (If this is
- please read <a href="http://www.gnu.org/philosophy/free-sw.html">
+ confusing to you, you might want to read up on the definitions of the
- http://www.gnu.org/philosophy/free-sw.html</a>.)
+ four freedoms associated with Free software, <a
+ href="http://www.gnu.org/philosophy/free-sw.html">http://www.gnu.org/philosophy/free-sw.html</a>.)
+ <p>The code I have written is released under a 3-clause BSD-style license
+ (or "revised BSD-style" if one wants to use <a
+ href="http://www.gnu.org/philosophy/bsd.html">GNU jargon</a>). Apart from
+ the code I have written, some files are copied from other sources such as
+ NetBSD, for example header files containing symbolic names of bitfields in
+ device registers. They are also covered by similar licenses, but with some
+ additional clauses. The main point, however, is that the licenses require
+ that the original Copyright and license terms are included when you make a
+ copy or modification.
+ <p>If you plan to redistribute GXemul <i>without</i> supplying the source
+ code, then you need to comply with each individual source file some other
+ way, for example by writing additional documentation containing copyright
+ notes. I have not done this, since I do not plan on making distributions
+ without source code. You need to check all individual files for details.
+ The "easiest way out" if you plan to redistribute code from GXemul is, of
+ course, to let it remain open source and simply supply the source code.
+ <p>(If a stable release of GXemul is packaged into binary form, and it is
+ obvious which version of GXemul was used to build the package, then it can
+ be argued that the source code is available, just not in that specific
+ package. Common sense should be used in this case, and not pedanticism.)
- <p>
- The code I have written is released under a 3-clause BSD-style license
- (or "revised BSD-style" if one wants to use
- <a href="http://www.gnu.org/philosophy/bsd.html">GNU jargon</a>.)
- Apart from the code I have written, some files are copied from other sources
- such as NetBSD, for example header files containing symbolic names of
- bitfields in device registers. They are also covered by similar licenses,
- but with some additional clauses. If you plan to redistribute GXemul
- (for example as a binary package), or reuse code from GXemul,
- then you should check those files for their license terms.
- <p>
- (The licenses usually require that the original Copyright and license
- terms are included when you make a copy or modification. The "easiest way
- out" if you plan to redistribute code from GXemul is to simply supply
- the source code. You should however check individual files for details.)
-Line 149 
 Uncompress the .tar.gz distribution file
+Line 157 
 Uncompress the .tar.gz distribution file
          $ <b>make</b>
  </pre>
- <p>
+ <p>This should work on most Unix-like systems. If it doesn't, then
- This should work on most Unix-like systems. If it doesn't, then please
  mail me a bug report.
- <p>
+ <p>The emulator's performance is highly dependent on both runtime settings
- (Note for Windows users: there is a possibility that some releases
- and/or snapshots will also work with Cygwin, but I can't promise that.)
- <p>
- The emulator's performance is highly dependent on both runtime settings
  and on compiler settings, so you might want to experiment with different
  CC and CFLAGS environment variable values. For example, on a modern PC,
  you could try the following:
- <p>
+ <p><pre>
- <pre>
+         $ <b>CFLAGS="-mcpu=pentium4 -O3" ./configure</b>
-         $ <b>CFLAGS="-mcpu=pentium4 -O3" ./configure</b>
+         $ <b>make</b>
-         $ <b>make</b>
  </pre>
+ <p><br>
+ <a name="run"></a>
+ <h3>How to run the emulator:</h3>
+ Once you have built GXemul, running it should be rather straight-forward.
+ Running <tt><b>gxemul</b></tt> without arguments (or with the
+ <b><tt>-h</tt></b> or <b><tt>-H</tt></b> command line options) will
+ display a help message.
  <p>
- Run <b>./configure --help</b> to get a list of configure options. (The
+ To get some ideas about what is possible to run in the emulator, please
- possible options differ between different releases and snapshots.)
+ read the section about <a href="guestoses.html">installing "guest"
+ operating systems</a>. If you are interested in using the emulator to
+ develop code on your own, then you should also read the section about
+ <a href="experiments.html#hello">Hello World</a>.
  <p>
- Once you have built GXemul, running it should be rather straight-forward.
  To exit the emulator, type CTRL-C to enter the
- single-step debugger, and then type <b>quit</b>. By typing CTRL-B instead,
+ single-step debugger, and then type <tt><b>quit</b></tt>.
- a CTRL-C is sent to the emulated program.
+ <p>
+ If you are starting an emulation by entering settings directly on the
+ command line, and you are not using the <tt><b>-x</b></tt> option, then all
+ terminal input and output will go to the main controlling terminal.
+ CTRL-C is used to break into the debugger, so in order to send CTRL-C to
+ the running (emulated) program, you may use CTRL-B.
+ (This should be a reasonable compromise to allow the emulator to be usable
+ even on systems without X Windows.)
+ <p>
+ There is no way to send an actual CTRL-B to the emulated program, when
+ typing in the main controlling terminal window. The solution is to either
+ use <a href="configfiles.html">configuration files</a>, or use
+ <tt><b>-x</b></tt>. Both these solutions cause new xterms to be opened for
+ each emulated serial port that is written to. CTRL-B and CTRL-C both have
+ their original meaning in those xterm windows.
-Line 189 
 a CTRL-C is sent to the emulated program
+Line 222 
 a CTRL-C is sent to the emulated program
  <h4>MIPS:</h4>
- Emulation of R4000, which is a 64-bit CPU, was my initial goal. Right
+ Emulation of R4000, which is a 64-bit CPU, was my initial goal.
- now, R2000/R3000-like CPUs are also emulated (32-bit), and emulation of
+ R2000/R3000-like CPUs (32-bit), R1x000, and generic MIPS32/MIPS64-style
- R1x000 (at least the parts that are similar to R4000) is beginning to work
+ CPUs are also emulated, and are hopefully almost as stable as the R4000
- as expected. Code targeted for MIPS32 and MIPS64 also often work.
+ emulation.
- <p>
+ <p>I have written an experimental dynamic binary translation subsystem.
- I have written an experimental dynamic binary translation subsystem.
  This gives higher total performance than interpreting one instruction at a
- time and executing it. (If you wish to enable bintrans, add <b>-b</b> to
+ time and executing it. (If you wish to disable bintrans, add <b>-B</b> to
- the command line, but keep in mind that it is still experimental.)
+ the command line.)
- <h4>URISC:</h4>
- I have implemented an <a href="http://en.wikipedia.org/wiki/URISC">URISC</a>
- emulation mode, just for fun. The only instruction available in an URISC
- machine is "reverse subtract and skip on borrow". (It is probably not
- worth trying to do bintrans with URISC, because any reasonable URISC
- program relies on self-modifying code, which is bad for bintrans
- performance.)
  <h4>Other CPU types:</h4>
- There is some code for 64-bit (and 32-bit) POWER/PowerPC emulation too,
+ Some other CPU architectures can also be partially emulated. These are not
- but it only works for "Hello World" and similarly trivial programs. (There
+ working well enough yet to run guest operating systems.
- are some other CPU modes too, but they are working even less.)
-Line 228 
 are some other CPU modes too, but they a
+Line 247 
 are some other CPU modes too, but they a
  <a name="accuracy"></a>
  <h3>Emulation accuracy:</h3>
- GXemul is an instruction-level simulator; things that would happen in
+ GXemul is an instruction-level emulator; things that would happen in
  several steps within a real CPU are not taken into account (eg. pipe-line
- stages or out-of-order execution). Still, instruction-level accuracy seems
+ stalls or out-of-order execution). Still, instruction-level accuracy seems
  to be enough to be able to run complete guest operating systems inside the
  emulator.
+ <p>Caches are by default not emulated. In some cases, the existance of
+ caches is "faked" to let operating systems think that they are there.
+ (There is some old code for R2000/R3000 caches, but it has probably
+ suffered from bitrot by now.)
+ <p>The emulator is <i>not</i> timing-accurate. It can be run in a
+ "deterministic" mode, <tt><b>-D</b></tt>. The meaning of deterministic is
+ simply that running two emulations with the same settings will result in
+ identical runs. Obviously, this requires that no user interaction is
+ taking place, and that clock speeds are fixed with the <tt><b>-I</b></tt>
+ option. (Deterministic in this case does <i>not</i> mean that the
+ emulation will be identical to some actual real-world machine.)
-Line 242 
 emulator.
+Line 274 
 emulator.
  <a name="emulmodes"></a>
  <h3>Which machines does GXemul emulate?</h3>
- A few different machine types are emulated. The machine types that are
+ A few different machine types are emulated. The following machine types
- emulated best at the moment are:
+ are emulated well enough to run at least one "guest OS":
  <p>
  <ul>
-   <li><b>DECstation 5000/200</b>&nbsp;&nbsp;("pmax")
+   <li><b>DECstation 5000/200</b>&nbsp;&nbsp;("3max")
-         <br>(Serial controller (including keyboard and mouse), ethernet,
+         <br>Serial controller (including keyboard and mouse), ethernet,
-         SCSI, and graphical framebuffers.)
+         SCSI, and graphical framebuffers.
    <p>
    <li><b>Acer Pica-61</b>&nbsp;&nbsp;(an ARC machine)
-         <br>(Serial controller, "VGA" text console, and SCSI.)
+         <br>Serial controller, "VGA" text console, and SCSI.
    <p>
    <li><b>NEC MobilePro 770, 780, 800, and 880</b>&nbsp;&nbsp;(HPCmips machines)
-         <br>(Framebuffer, keyboard, and a PCMCIA IDE controller.)
+         <br>Framebuffer, keyboard, and a PCMCIA IDE controller.
+   <p>
+   <li><b>Cobalt</b>
+         <br>Serial controller and PCI IDE.
+   <p>
+   <li><b>Malta (evbmips)</b>
+         <br>Serial controller and PCI IDE.
+   <p>
+   <li><b>SGI O2 ("IP32")</b>
+         <br>Serial controller and ethernet.&nbsp;&nbsp;<small>(Enough for
+         root-on-nfs, but not for disk boot.)</small>
  </ul>
- <p>
+ <p>There is code in GXemul for emulation of many other machine types; the
- There is code in GXemul for emulation of many other machine types;
+ degree to which these work range from almost being able to run a complete
- the degree to which these work range from "almost" being able to run
+ OS, to almost completely unsupported (perhaps just enough support to
- a complete OS, to almost completely unsupported (perhaps just enough
+ output a few boot messages via serial console).
- support to output a few boot messages via serial console).
+ <p>In addition to emulating real machines, there is also a "test-machine".
- <p>
+ A test-machine consists of one or more CPUs and a few experimental devices
- In addition to specific machine types, a "test-machine" can be emulated.
+ such as:
- A test-machine consists of one or more CPUs and a few experimental
- devices such as:
  <p>
  <ul>
    <li>a console I/O device (putchar() and getchar()...)
    <li>an inter-processor communication device, for SMP experiments
    <li>a very simple linear framebuffer device (for graphics output)
+   <li>a simple SCSI disk controller
+   <li>a simple ethernet controller
  </ul>
- <p>
+ <p>This mode is useful if you wish to run experimental code, but do not
- This mode is useful if you wish to run experimental code, but do not
  wish to target any specific real-world machine type, for example for
  educational purposes.
- <p>
+ <p>You can read more about these experimental devices <a
- You can read more about these experimental devices
+ href="experiments.html#expdevices">here</a>.
- <a href="experiments.html#expdevices">here</a>.
-Line 293 
 You can read more about these experiment
+Line 333 
 You can read more about these experiment
  <p><br>
  <a name="guestos"></a>
- <h3>Which guest OSes are possible to run?</h3>
+ <h3>Which guest OSes are possible to run in GXemul?</h3>
- This table sums up the guest OSes that run well enough to be considered
+ This table lists the guest OSes that run well enough to be considered
  working in the emulator. They can boot from a harddisk image and be
- interacted with similar to a real machine:
+ interacted with similar to a real machine.
- <p><br>
-  <center>
-   <table border="0">
-     <tr><td>
-       <table border="0">
-         <tr><td align="center">
-           <table border="0">
-             <tr>
-               <td valign="top"><b><u>Guest&nbsp;OS:</u></b></td>
-               <td width="15">&nbsp;</td>
-               <td valign="top"><b><u>Emulation&nbsp;mode:</u></b></td>
-               <td width="35">&nbsp;</td>
-               <td valign="top"><b><u>Guest&nbsp;OS:</u></b></td>
-               <td width="15">&nbsp;</td>
-               <td valign="top"><b><u>Emulation&nbsp;mode:</u></b></td>
-             </tr>
-             <tr>
-               <td height="1"></td>
-             </tr>
-             <tr>
-               <td valign="top"><a href="http://www.netbsd.org/Ports/pmax/">NetBSD/pmax</a></td>
-               <td></td>
-               <td valign="top">DECstation</td>
-               <td></td>
-               <td valign="top"><a href="http://www.netbsd.org/Ports/arc/">NetBSD/arc</a></td>
-               <td></td>
-               <td valign="top">ARC&nbsp;(Acer&nbsp;Pica)</td>
-             </tr>
-             <tr>
-               <td valign="top"><a href="http://www.openbsd.org/pmax.html">OpenBSD/pmax</a></td>
-               <td></td>
-               <td valign="top">DECstation</td>
-               <td></td>
-               <td valign="top"><a href="http://www.openbsd.org/arc.html">OpenBSD/arc</a></td>
-               <td></td>
-               <td valign="top">ARC (Acer Pica)</td>
-             </tr>
-             <tr>
-               <td valign="top">Ultrix/RISC</td>
-               <td></td>
-               <td valign="top">DECstation</td>
-               <td></td>
-               <td valign="top"><a href="http://www.cs.berkeley.edu/projects/sprite/retrospective.html">Sprite</a></td>
-               <td></td>
-               <td valign="top">DECstation</td>
-             </tr>
-             <tr>
-               <td valign="top">Redhat&nbsp;Linux<super>*</super></td>
-               <td></td>
-               <td valign="top">DECstation</td>
-               <td></td>
-               <td valign="top"><a href="http://www.debian.org/">Debian&nbsp;GNU/Linux</a><super>*</super></td>
-               <td></td>
-               <td valign="top">DECstation</td>
-             </tr>
-             <tr>
-               <td valign="top"><a href="http://www.netbsd.org/Ports/hpcmips/">NetBSD/hpcmips</a></td>
-               <td></td>
-               <td valign="top">NEC MobilePro</td>
-             </tr>
-           </table>
-         </td></tr>
-         <tr><td height="15">&nbsp;</td></tr>
-         <tr><td>
-           <center>
-             <table border="0">
-               <tr>
-                 <td width=160 align=center><a href="netbsd-pmax-20040630.png"><img src="netbsd-pmax-20040630_small.png"></a></td>
-                 <td width=160 align=center><a href="openbsd-pmax-20040710.png"><img src="openbsd-pmax-20040710_small.png"></a></td>
-                 <td width=160 align=center><a href="ultrix4.5-20040706.png"><img src="ultrix4.5-20040706_small.gif"></a></td>
-               </tr>
-               <tr>
-                 <td align=center>NetBSD/pmax&nbsp;1.6.2</td>
-                 <td align=center>OpenBSD/pmax&nbsp;2.8</td>
-                 <td align=center>Ultrix&nbsp;4.5</td>
-               </tr>
-               <tr>
-                 <td height=10>&nbsp;</td>
-               </tr>
-               <tr>
-                 <td width=160 align=center><a href="20041024-netbsd-arc-installed.gif"><img src="20041024-netbsd-arc-installed_small.gif"></a></td>
-                 <td width=160 align=center><a href="20041024-openbsd-arc-installed.gif"><img src="20041024-openbsd-arc-installed_small.gif"></a></td>
-                 <td width=160 align=center><a href="sprite-20040711.png"><img src="sprite-20040711_small.png"></a></td>
-               </tr>
-               <tr>
-                 <td align=center>NetBSD/arc&nbsp;1.6.2</td>
-                 <td align=center>OpenBSD/arc&nbsp;2.3</td>
-                 <td align=center>Sprite</td>
-               </tr>
-               <tr>
-                 <td height=10>&nbsp;</td>
-               </tr>
-               <tr>
-                 <td width=160 align=center><a href="20041129-redhat_mips.png"><img src="20041129-redhat_mips_small.png"></a></td>
-                 <td width=160 align=center><a href="20041213-debian_4.png"><img src="20041213-debian_4_small.gif"></a></td>
-                 <td width=160 align=center><a href="20050331-netbsd-hpcmips.png"><img src="20050331-netbsd-hpcmips_small.png"></a></td>
-               </tr>
-               <tr>
-                 <td align=center>Redhat&nbsp;Linux<super>*</super></td>
-                 <td align=center>Debian&nbsp;GNU/Linux<super>*</super></td>
-                 <td align=center>NetBSD/hpcmips</td>
-               </tr>
-             </table>
-           </center>
-         </td></tr>
-       </table>
-     </td></tr>
-   </table>
-  </center>
- <p><br>
- (<super>*</super> Although Linux runs under DECstation emulation, the
- default kernel in Debian GNU/Linux does not support keyboards on the 5000/200
- (the specific DECstation model being emulated), so when the login prompt
- is reached you cannot interact with the system.
- Kaj-Michael Lang has compiled and made available a newer kernel from the
- current mips-linux development tree. You can find it here:
- <a href="http://home.tal.org/~milang/o2/kernels/">http://home.tal.org/~milang/o2/kernels</a>/<a 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>
- This newer kernel supports keyboard input, but it does not have Debian's
- ethernet patches, so you will not be able to use keyboard/framebuffer
- <i>and</i> networking at the same time.)
  <p>
- It is non-trivial to get a specific operating system or OS kernel to
+ <center><table border="0">
- run in the emulator, so don't expect the list above to grow too quickly.
+         <tr>
+           <td width="10"></td>
- <p>
+           <td align="center"><a href="20050317-example.png"><img src="20050317-example_small.png"></a></td>
- There is no guarantee that anything specific will run in the emulator, but
+           <td width="15"></td>
- NetBSD is a good starting point for someone who wants to experiment.
+           <td><a href="http://www.netbsd.org/Ports/pmax/">NetBSD/pmax</a>
+                 <br>DECstation 5000/200</td>
+           <td width="30"></td>
+           <td align="center"><a href="20041024-netbsd-arc-installed.gif"><img src="20041024-netbsd-arc-installed_small.gif"></a></td>
+           <td width="15"></td>
+           <td><a href="http://www.netbsd.org/Ports/arc/">NetBSD/arc</a>
+                 <br>Acer Pica-61</td>
+         </tr>
+         <tr><td height="10"></td></tr>
+         <tr>
+           <td></td>
+           <td align="center"><a href="openbsd-pmax-20040710.png"><img src="openbsd-pmax-20040710_small.png"></a></td>
+           <td></td>
+           <td><a href="http://www.openbsd.org/pmax.html">OpenBSD/pmax</a>
+                 <br>DECstation 5000/200</td>
+           <td></td>
+           <td align="center"><a href="20041024-openbsd-arc-installed.gif"><img src="20041024-openbsd-arc-installed_small.gif"></a></td>
+           <td></td>
+           <td><a href="http://www.openbsd.org/arc.html">OpenBSD/arc</a>
+                 <br>Acer Pica-61</td>
+         </tr>
+         <tr><td height="10"></td></tr>
+         <tr>
+           <td></td>
+           <td align="center"><a href="ultrix4.5-20040706.png"><img src="ultrix4.5-20040706_small.gif"></a></td>
+           <td></td>
+           <td>Ultrix/RISC<br>DECstation 5000/200</td>
+           <td></td>
+           <td align="center"><a href="20041213-debian_4.png"><img src="20041213-debian_4_small.gif"></a></td>
+           <td></td>
+           <td><a href="http://www.debian.org/">Debian&nbsp;GNU/Linux</a>&nbsp;<super>*</super>
+                 <br>DECstation 5000/200</td>
+         </tr>
+         <tr><td height="10"></td></tr>
+         <tr>
+           <td></td>
+           <td align="center"><a href="sprite-20040711.png"><img src="sprite-20040711_small.png"></a></td>
+           <td></td>
+           <td><a href="http://www.cs.berkeley.edu/projects/sprite/retrospective.html">Sprite</a>
+                 <br>DECstation 5000/200</td>
+           <td></td>
+           <td align="center"><a href="20041129-redhat_mips.png"><img src="20041129-redhat_mips_small.png"></a></td>
+           <td></td>
+           <td>Redhat&nbsp;Linux&nbsp;<super>*</super>
+                 <br>DECstation 5000/200</td>
+         </tr>
+         <tr><td height="10"></td></tr>
+         <tr>
+           <td></td>
+           <td align="center"><a href="20050427-netbsd-hpcmips-2.png"><img src="20050427-netbsd-hpcmips-2_small.png"></a></td>
+           <td></td>
+           <td><a href="http://www.netbsd.org/Ports/hpcmips/">NetBSD/hpcmips</a>
+                 <br>NEC MobilePro 770, 780, 800, 880</td>
+           <td></td>
+           <td align="center"><a href="20050413-netbsd-cobalt.png"><img src="20050413-netbsd-cobalt_small.png"></a></td>
+           <td></td>
+           <td><a href="http://www.netbsd.org/Ports/cobalt/">NetBSD/cobalt</a>
+                 <br>Cobalt</td>
+         </tr>
+         <tr><td height="10"></td></tr>
+         <tr>
+           <td></td>
+           <td align="center"><a href="20050626-netbsd-sgimips-netboot.png"><img src="20050626-netbsd-sgimips-netboot_small.png"></a></td>
+           <td></td>
+           <td><a href="http://www.netbsd.org/Ports/sgimips/">NetBSD/sgimips</a>
+                 <br>SGI O2 ("IP32")</td>
+           <td></td>
+           <td align="center"><a href="20050622-netbsd-evbmips-malta.png"><img src="20050622-netbsd-evbmips-malta_small.png"></a></td>
+           <td></td>
+           <td><a href="http://www.netbsd.org/Ports/evbmips/">NetBSD/evbmips</a>
+                 <br>5Kc (and 4Kc) Malta<br>evaluation boards</td>
+           <td></td>
+         </tr>
+ </table></center>
+ <p><br>
+ <super>*</super> Although Linux runs under DECstation emulation, the
+ default 2.4.27 kernel in Debian GNU/Linux does not support keyboards on
+ the 5000/200 (the specific DECstation model being emulated), so when the
+ login prompt is reached you cannot interact with the system. Kaj-Michael
+ Lang has compiled and made available a newer kernel from the current
+ mips-linux development tree. You can find it here: <a
+ href="http://home.tal.org/~milang/o2/kernels/">http://home.tal.org/~milang/o2/kernels</a>/<a
+ 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>
+ This newer kernel supports keyboard input, but it does not have Debian's
+ ethernet patches, so you will not be able to use keyboard/framebuffer
+ <i>and</i> networking at the same time.
- </p>
  </body>
  </html>

 Legend:



Removed from v.2
 


changed lines


 
Added in v.12
 Legend:



Removed from v.2
 


changed lines


 
Added in v.12
-Removed from v.2
+Added in v.12

	ViewVC Help
Powered by ViewVC 1.1.26