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Emulators for PSP
Name = Bochs for PSP (x86/PC Emulator for the PSP)
Authors /Website = Matan
Downloads = Here 13th August 2005
What is this?
Yes, it's true. I've managed to run Windows 95 and Linux on the PSP. I've
done it by porting the excellent open source x86 emulator Bochs.
Windows 95 actually runs quite well but don't expect it to be a speed demon.
It takes about 10 minutes to boot but afterwards it's pretty usable. I was
able to do things like: open "My computer" and browse the virtual
hard drive, complete a whole game of Minesweeper and run various other applications.
Now you too can get your Minesweeper fix on the go :)
I've also tested DLX Linux which comes pre-packaged with Bochs and it works
just fine. However, I couldn't do much with it because there's no keyboard
support. If you want to do your word processing on it then wait until keyboard
support is implemented (though I doubt it will be any fun using the joystick).
In windows, mouse handling is extremely difficult. I suspect it has something
to do with the "boost" feature windows has. Once you get the mouse
moving it will keep moving in that direction even when you're trying to
move to a different direction. The solution is to counter the movement by
moving to the opposite direction. It's sort of like trying to push the mouse
the other way in order to stop it.
- I've used a simple software rescaling algorithm so the entire screen
will fit into the tiny 480x272. This of course takes a lot of CPU time and
slows everything down quite a bit. It is possible to rescale the screen
using the built in 3D hardware acceleration and I will get on it soon.
- The analog joystick should be used for mouse support.
- Some sort of keyboard input should be implemented although you can use
the windows virtual keyboard right now.
How to run
1) Create your bochs image and configuration files. I highly recommend
installing the OS on a PC before moving it to the PSP (unless you want to
spend the next 10 years staring at a progress bar). You can also download
some readily available images from here.
2) Download and unzip the files below.
3) If you have 1.0 firmware put the EBOOT.PBP file under the GAME directory
(e.g X:\PSP\GAME\BOCHS where X is the PSP drive). If you have a version
1.5 firmware you need to repackage the file using KXploit. I haven't tested
it on a v1.5 firmware so I hope it works. It won't work on newer firmwares
(v1.51, v1.52, v2.0) because it's impossible to run homebrew applications
on them at this time.
4) Create a directory named VM in the root of the memory stick (e.g X:\VM).
5) Copy the disk images and bios files anywhere on the PSP.
6) Edit the bochs configuration file so it will point to your disk images
and bios files correctly. Note that on a PSP you have to use the "ms0:/"
prefix as the root of your filesystem (see the example configuration in
the downloads). Also set the amount of memory your VM will use. Be sure
to set it to about 8MB as the PSP will crash if you try to use more (the
PSP has about 32MB of RAM total).
7) Rename the bochs configuration file to "bochsrc.bxrc" and
put it under the VM directory. This is the only real requirement as the
path to the configuration is hardcoded. You can put the rest of the files
wherever you want as long as the configuration file points to them correctly.
See downloads section for sample script.
8) Run bochs and hope for the best.
Directional keys - Mouse movement (press repeatedly)
SQUARE - Left mouse button
CIRCLE - Right mouse button
CROSS - Middle mouse button
START - Opens the windows start menu :)
SELECT - Quits immediatly (though you should shutdown windows instead)
By downloading the file you agree that I am not responsible for any damage
caused by this software. I use the "overclocking" feature the
PSP has to make the CPU work full speed at 333mhz. Nobody is sure how it
affects the PSP. Also, the virtual machine sometimes writes a lot of data
to the flash memory stick which could shorten it's life.
Bottom line, If your PSP starts bursting into flames after running this,
don't blame me.
Samples bochs script for DLX Linux
Sources (coming ASAP)
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