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Topic: Plex86

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In the News (Tue 25 Jun 19)

  Plex86 x86 Virtual Machine Project   (Site not responding. Last check: 2007-10-25)
Plex86 has been rehashed/revitalized to offer a very lightweight Virtual Machine (VM) for running Linux/x86.
Rather, guest Linux code is executed as-is in a safe VM environment managed by a VM monitor.
Guest kernel code is executed at a less priviliged level, causing privileged operations to generate exceptions which are managed by the VM monitor.
plex86.sourceforge.net   (257 words)

  Plex86 Performance   (Site not responding. Last check: 2007-10-25)
Plex86 is NOT in a benchmarkable state, rather in a proof-of-concept state.
Benchmarking plex86 at this point is rather moot, until the following restrictions/issues have been dealt with.
Plex86 has a very small codebase, so it is very amenable to tweaking.
plex86.sourceforge.net /performance.html   (523 words)

 Plex86 Unix project & linux newsgroups resource
Plex86 has been revitalized/rehashed to offer a very light (VM) Virtual Machine for running Linux / x86.
Rather than implement a heavyweight VM which can run all guest (OSes) Operating Systems, the new approach is to run only Linux VMs, making the new plex86 architecture on the order of 100x more simplistic.
Guest kernel code is executed at a less priviliged level, causing privileged operat I/Ons to generate except I/Ons which are managed by the VM monitor.
www.plex86.org   (433 words)

Plex86 is rather for end-user usage while Bochs is portable, useful for development, not useful for end-user usage because it is relatively slow.
The "new" plex86 at sf.net is under the MIT license and only tries to run linux by applying patches to the kernel.
Plex86 at savannah.nongnu.org is under the GPL and tries to do more or less the same as VMWare.
www.osnews.com /comment.php?news_id=5735&limit=no   (818 words)

 [eros-cvs] cvs commit: eros/src/doc/www/design-notes 00DesignNotes.html IA32-Emulation.html
In plex86 this is done by providing a kernel + subsystem that builds a real page table (and, I am + guessing, a shadow segment table) on the side and + ``warping'' between the guest application and the host + operating system.
Plex86 then implements non-application + code using a variety of interpretation techniques ranging + from single-instruction interpretation to (eventually) JIT + compilation.
Plex86 switches the entire address space, using + a small trampoline to switch back when the guest + environment faults.
www.eros-os.org /pipermail/eros-cvs/2002-March/000978.html   (6268 words)

 IA-32 Emulation
In plex86, which emulates on a Linux host, paging and segmentation are handled by providing a kernel subsystem that builds a real page table (and, I am guessing, a shadow segment table) on the side and ``warping'' between the guest application and the host operating system.
Plex86 then implements non-application code using a variety of interpretation techniques ranging from single-instruction interpretation to (eventually) JIT compilation.
Unfortunately, the amount of code that plex86 places in the kernel to support this is considerable (including a JIT compiler), and would probably preclude assurance evaluation for EROS if we were to do that.
www.eros-os.org /design-notes/IA32-Emulation.html   (9077 words)

 d/mand-bochs   (Site not responding. Last check: 2007-10-25)
Plex86 quickly attracted the attention of many users in search of an open source and high-performance way to run Windows applications on Linux and other operating systems.
Development of Plex86 is progressing rapidly, drawing from 6 years of work and a large code base intersect with the Bochs project.
Plex86 project can be seen at: http://www.plex86.org Linux-Mandrake distribution can be seen at: http://www.linux-mandrake.com -- < Gael DUVAL - gduval@mandrakesoft.com > < http://www.mandrake.com >
lwn.net /2000/0323/a/mand-bochs.html   (339 words)

 Re: [plex86] {Off-Topic} VGA reference
For performance reasons, Plex86 does some virtualization, but the key is, for PERFORMANCE REASONS.
The Plex86 BIOS should check to see if the CMOS shutdown code is 0Ah in case an old DOS extendor designed for 286's is trying to reset the CPU to get out of protected mode.
Also when I write an OS I like to write to 40:67 and change the shutdown code to 0Ah in case something goes wrong and it tripple faults (for example, if I have done an LIDT with a null limit and then caused a fault...
www.mail-archive.com /plex86@fastxs.net/msg01993.html   (805 words)

 Plex86 - Wikipedia, the free encyclopedia
Plex86 is a project to create a virtual machine for the x86 architecture that runs Linux operating system.
In the past there has been some confusion as to the main goal of Plex86 - starting out as a being basically a stripped-down version of Bochs.
Plex86 has many attributes in common with Bochs, except that where bochs attempts to emulate almost the whole system (which takes considerably more system resources,) Plex86 only emulates the parts of the system that it absolutely has to, in order to be able to run a Linux operating system.
en.wikipedia.org /wiki/Plex86   (249 words)

 [No title]
Plex86 And The Hurd 10 Dec 2000 (3 posts) Archive Link: "Plex86 boots GRUB" Summary By Paul Emsley Topics: Bootloaders, Emulators: plex86 People: Marcus Brinkmann Marcus Brinkmann had tried to get plex86 to boot the Hurd: plex86 CVS version boots GRUB.
With increasing performance of plex86, this might be a good alternative to dual boot under some circumstances.
Interested people should coordinate their work within the plex86 project and keep us up to date when you make progress.
www.kerneltraffic.org /debian-hurd/dh20001220_72.txt   (1355 words)

 Amazon.com: Plex86: Books   (Site not responding. Last check: 2007-10-25)
Plex86 is an extensible free PC virtaualization software program which will...
The Plex86 project claims to be able to run Windows 95, FreeDOS,...
Plex86 is the open source world's answer to VMware.
www.amazon.com /s?ie=UTF8&keywords=Plex86&tag=httpexplaguid-20&index=books&link_code=qs&page=1   (714 words)

 Emulation, Virtualization, and More | Linux Magazine
Plex86, like VMWare, follows in the tradition of IBM mainframes: both Plex86 and mainframes use the capabilities of the underlying hardware to provide one or more virtual machines, where each virtual machine can run the operating system of your choice.
However, with Plex86, you can use the raw horsepower of that new 2.4 GHz Pentium 4 to run Linux and Windows at the same time.
The project's home page mentions that Plex86 can be used to run Linux inside the Plex86 virtual machine (with only minimal changes to build a suitable Linux kernel), and that you can combine Bochs (described next) and Plex86 to accelerate Bochs.
www.linux-mag.com /id/1429   (767 words)

 DLFP: Plex86 (ex-FreeMWare) sort en v0.1
Je crois que ce n'est pas tout à fait vrai : Plex86 a besoin d'ajouter un module au noyau, donc, il y a quand même un bout qui tourne en kernel mode.
Je voulais savoir quelle diference il y a entre un plex86 qui fait tourner un linux ds un linux et l'user mode du nouveau noyau.
Quand il a été laché, il a d'abord stoppé Plex86, qq'un l'a repris sur Savannah, puis il est réapparu sur Bochs (son bébé) où il a pas mal boosté le développement jusqu'à la 2.0 si j'ai bien compris, amenant des trucs de Plex86.
linuxfr.org /2003/07/18/13297.html   (4320 words)

 Run Windows95 under Linux with Plex86   (Site not responding. Last check: 2007-10-25)
Plex86 is open source and available under the LGPL.
Plex86 can be used on its own for running Linux as a guest.
It has recently been demonstrated(1) that the Linux kernel can be executed inside the plex86 VM at user-privilege, with only minimal changes to the kernel source Makefiles.
librenix.com /?inode=376   (132 words)

 A Server for Bochs/Plex86   (Site not responding. Last check: 2007-10-25)
For those of you who don't know, Bochs and Plex86 are both x86 emulators.
After taking a deeper look at Bochs and Plex86, I noticed that niether one has decent support for virtualizing network cards, this would make it hard to run VNC inside the emulated OS.
Bochs and Plex86 both have a set of GUI stubs to allow easy porting to various GUI enviroments.
www.realvnc.com /pipermail/vnc-list/2000-May/014470.html   (263 words)

 Plex86 packages hit Sid - Debian Planet   (Site not responding. Last check: 2007-10-25)
While Plex86 has recieved development funds (from I think SuSE, possibly Wasabi or NetBSD as well) the goal is (ideally) to keep the codebase in sync between Plex86 and Bochs.
While Plex86 will have better performance than Bochs, becuase it has less to emulate, WINE should have better permance than both, because instead of emulating the entire system, it only emulated function calls under an emulated Win32 ABI.
Plex86 actually produces native code from the guest code - but most of it is the same so there is a nice optimisation you can do - which is...
www.debianplanet.org /node.php?id=488   (983 words)

 Plex86 Virtual Machine - Summary [Savannah]
If you want a good idea as to how I think about patches (and why they aren't being added to the old plex86 tree for the time being...) then you should have a look at what Linus said about how he accepts patches for his project.
The old plex86 web site is no more.
I was wondering how long it would take for them to take it down, but it is now--the wondering is over.
savannah.nongnu.org /projects/plex86   (297 words)

 Plex86 Virtual Machine - Summary [Savannah]
Plex86 is THE opensource free-software alternative for VMWare, VirtualPC, and other IA-32 on IA-32 "Virtual PC products." Note:If you want to run IA-32 on a non-IA-32 architecture, then you should check out the bochs project--they are at SourceForge.
be relicensed to the MIT license, which is basicaly an open permission for everyone to relicense it and release propietary versions of Plex86.
Kevin has resumed work on a lighter-weight version of Plex86.
savannah.gnu.org /projects/plex86   (297 words)

 BSDCon '03 — Technical Paper
Plex86 uses a special protection mechanism of Pentium, which is also known as Protected Mode Virtual Interrupts (PVI).
Compared with Plex86, our approach differs in that we use a language processor (the assembler preprocessor), and we rewrite machine instructions of a user-level OS statically.
Our partial emulators are slower than Plex86 because Plex86 uses an efficient hardware mechanism called PVI, as described in Section 2.
www.usenix.org /publications/library/proceedings/bsdcon03/tech/eiraku/eiraku_html   (5888 words)

 Pro-Linux News: Plex86 soll schneller werden
Wobei plex86 flexibler ist und vom Prinzip her mehr Kompatibilität bietet und darüberhinaus auch noch andere Betriebssysteme laufen lassen kann.
Ich kann Plex86 (oder abstrakter eine VM) sehr gut gebrauchen, auch um nur mal ein paar Distis in einer virtuellen Umgebung austesten zu können oder um eine Beta/Alpha-Installationsumgebung zu haben).
Selbst plex86 wird dann wohl nicht drauf laufen, da es gerade dadrauf optimiert wird, dass es auf Intel-Rechnern laeuft um Betriebsyteme die auf Intel-Rechner laufen dadrauf auszufuehren.
www.pro-linux.de /news/2001/3035.html   (2930 words)

 Section misc - Debian Package: plex86   (Site not responding. Last check: 2007-10-25)
Plex86 is an extensible free PC virtualization software program which will allow PC and workstation users to run multiple operating systems concurrently on the same machine.
Plex86 is able to run several operating systems, including MSDOS, FreeDOS, Windows9x/NT, GNU/Linux, FreeBSD and NetBSD.
It will run as much of the operating system and application software natively as possible, the rest being emulated by the PC virtualization monitor.
www.mnis.fr /deb30/misc/plex86.html   (83 words)

 Plex86 Lives, As Lightweight VM Technology - DevBuilder
But the bonus is, Linux can easily be made to run inside the plex86 VM, so that the kernel is actually 'pushed down' to user privilege level.
Thus, Linux can run in a plex86 VM without the need for any heavy virtualization.
There are email lists available on the main plex86 site.
www.devbuilder.org /article/62   (146 words)

 SourceForge.net: Plex86 - An x86 Virtual Machine
Jump to downloads for Plex86 - An x86 Virtual Machine
Plex86 is an OSS virtual machine project for x86.
It can be used on its own to run Linux VMs using lightweight VM technology, or in conjunction with the bochs emulator as an accelerator to run non VM-friendly OSes.
sourceforge.net /projects/plex86   (155 words)

 Open Directory - Computers: Emulators: Intel x86 Architecture   (Site not responding. Last check: 2007-10-25)
Plex86 - An open source alternative to VMWare.
Plex86 x86 Virtual Machine Project - Simulates a x86 processor and can be used to run Linux as a guest.
It also can be used to accelerate bochs by executing user code inside the plex86 VM, while letting bochs execute kernel code and IO functionality inside the emulator.
dmoz.org /Computers/Emulators/Intel_x86_Architecture   (646 words)

 Running Linux on Windows LG #106   (Site not responding. Last check: 2007-10-25)
The new version of Plex86 doesn't run on Windows yet, and is therefore outside the scope of this article.
In fact, while the original version of Plex86 was designed to be similar to VMWare (the project was originally called FreeMWare), the new version does not perform dynamic translation, or emulate hardware (though as far as I can tell, this is included in
Bochs, and Bochs combined with Plex86 provides the same sort of functionality as VMWare).
www.tesre.bo.cnr.it /Services/Local/lg/106/oregan.html   (963 words)

 The VMWare and plex86 Patent Position   (Site not responding. Last check: 2007-10-25)
Very recently a new player in the virtualisation game has appeared called VOS, unknown until recently they have apparently filled broad ranging patent applications across the discipline.
If legitimate this casts a shadow across the continued development of both VMWare and plex86.
On the other hand the VOS web site looks somewhat suspicious and the current opinion in the community is that it might be a hoax, and since they are currently taking credit card orders, a malicious hoax at that.
star-www.rl.ac.uk /star/dvi/sc15.htx/node120.html   (164 words)

 User Mode Linux and open source virtual machines - Unix Help Forum   (Site not responding. Last check: 2007-10-25)
Plex86 did most of the coding of Bochs in its initial stage, when it
Plex86 and User mode linux run linux only.
Plex86 can be used to speed up Bochs.
www.unixgroups.com /thread98.html   (796 words)

 plex86 (previously FreeMWare)   (Site not responding. Last check: 2007-10-25)
There is an open source competitor to VMWare, called plex86 (previously called FreeMWare).
Since the last edition of this cookbook coding has advanced rapidly and is now actually able to run DOS 6.22 as a guest operating system.
Figure: plex86 running DOS 6.22 as a ``guest'' operating system.
www.starlink.rl.ac.uk /star/docs/sc15.htx/node119.html   (85 words)

 Linux.com Article DB: An End to Your Windows Woes - 1/1
These are both emulators that allow a lesser degree of virtualization on the x86 platform, which allows one to run multiple operating systems concurrently.
Plex86, despite its promising appearance, is still very much pre-alpha and in fact lacks an installer altogether at this stage.
For Linux users who need to be able to exchange files with others in native Microsoft formats, an emulated Windows environment seems to be the only option, at least for the moment.
linux.omnipotent.net /article.php?article_id=11944   (1181 words)

 Functionality vs. Features
Plex86, posted 27 Sep 2002 at 16:32 UTC by zx64 » (Journeyer)
Bochs and VMWare are two different things, if you want an x86 only x86 emulator (which is what VMWare is), there's Plex86 (by the same person as bochs).
Plex86 is faster because it doesn't have to emulate the entire x86 (but needs some kernel patching).
www.advogato.org /article/552.html   (1795 words)

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