maemo.org - Talk - bochs emulation

I tried out bochs x86 PC emulator on N900 the other day. Here's what I did to install a freedos image in bochs. Just some things you should know to start off:-
bochs file locations
bochs binaries are located here:

Code:

/opt/bochs/bin

bios images, vgabios images, keymaps are located here:

Code:

/opt/bochs/share/bochs/

docs, readme, changes, bochsrc configuration file sample are located here:

Code:

/opt/bochs/share/doc/bochs/

suggested location for disc images (based on the sample bochsrc file disc images are to be placed here, you create this folder yourself):

Code:

/home/user/MyDocs/bochs

How to setup a disc image for use in bochs x86 pc emulator using FreeDOS as an example
1. Download the ready made FreeDOS image to your PC from
http://bochs.sourceforge.net/diskimages.html
2. Extract the contents of freedos-img.tar.gz and you should have four files: a.img, b.img, c.img, bochsrc
3. Open bochsrc in a text viewer on your PC
4. On your N900, copy the sample to your MyDocs/bochs folder ready for editing:

Code:

cp /opt/bochs/share/doc/bochs/bochsrc-sample.txt /home/user/MyDocs/bochs/bochsrc

5. Use the freedos bochsrc settings viewed on your PC to amend the bochsrc file on your N900:

Code:

leafpad /home/user/MyDocs/bochs/bochsrc

It should now look something like this:

Code:

# FreeDOS configuration file on N900

config_interface: textconfig

display_library: sdl

megs: 32

romimage: file="/opt/bochs/share/bochs/BIOS-bochs-latest"

vgaromimage: file="/opt/bochs/share/bochs/VGABIOS-lgpl-latest-cirrus"

vga: extension=vbe

floppy_bootsig_check: disabled=0

floppya: 1_44="/home/user/MyDocs/bochs/a.img", status=inserted

floppyb: 1_44="/home/user/MyDocs/bochs/b.img", status=inserted

ata0: enabled=1, ioaddr1=0x1f0, ioaddr2=0x3f0, irq=14

ata0-master: type=disk, path="/home/user/MyDocs/bochs/c.img", cylinders=306, heads=4, spt=17

boot: c

ata1: enabled=1, ioaddr1=0x170, ioaddr2=0x370, irq=15

ata2: enabled=0

ata3: enabled=0

parport1: enabled=1, file=""

parport2: enabled=0

com1: enabled=1, mode=null, dev=""

com2: enabled=0

com3: enabled=0

com4: enabled=0

usb1: enabled=0

vga_update_interval: 400000

vga: extension=cirrus

cpu: count=1, ips=2000000, reset_on_triple_fault=1

text_snapshot_check: enabled=0

private_colormap: enabled=0

clock: sync=none, time0=local

# no cmosimage

ne2k: enabled=0

pnic: enabled=0

sb16: enabled=0

# no loader

log: bochsout.txt

logprefix: %t%e%d

debugger_log: -

panic: action=ask

error: action=report

info: action=report

debug: action=ignore

pass: action=fatal

keyboard_type: mf

keyboard_serial_delay: 250

keyboard_paste_delay: 100000

keyboard_mapping: enabled=0, map=

user_shortcut: keys=none

mouse: enabled=0

6. Transfer the files a.img, b.img, c.img from your PC to your N900 to the location /home/user/MyDocs/bochs
7. Now you're ready to run FreeDOS in Bochs
Change to the directory where your disc image and config file is located:

Code:

cd /home/user/MyDocs/bochs

Launch bochs:

Code:

/opt/bochs/bin/bochs

and on the bochs main menu, enter 6 to begin simulation.

Hope that helps get you started.
Oh and for reference here's a link to the bochs user manual from the bochs home page - not specific for the N900 but will answer any questions regarding disc images for use in bochs.