installing CRUX

Anthony LaTorre tlatorre at
Tue Jul 5 22:38:25 UTC 2016

Hi all,

It turns out it was just bad RAM. I ran memtest and saw lots of
errors. Thanks everybody for the help! I've attached instructions for
how to install CRUX on the SBC. Maybe it will be useful for somebody
in the future (I think a lot of physicists use CRUX for these single
board computers).



On Fri, Jul 1, 2016 at 11:22 PM, Danny Rawlins
<monster.romster at> wrote:
> On 02/07/16 02:49, Anthony LaTorre wrote:
>> Hi,
>> I'm trying to install CRUX 2.7.1 on a Pentium 3 single board computer
>> with 512 MB of RAM. The data sheet for the SBC is here:
>> I'm booting from a CD ROM and after I get to the "boot: " prompt and
>> hit enter everything goes OK until I get to:
>> * Copying files from squashfs
>> at which point everything goes haywire. Sometimes I get "cp: read
>> error" messages, sometimes it segfaults, but I've never been able to
>> get past this point.
>> I should mention that the only hard drive on the machine is an 8 GB
>> compact flash card, I don't know if that's relevant.
>> Any ideas on whether I might be able to get this to work or not?
>> Thanks,
>> Tony
>> _______________________________________________
>> CRUX mailing list
>> CRUX at
> Media sounds defective. compare the md5sum from the meda and the iso,
> you might want to use that has a crux 3.2 32bit iso.
> Regards,
> Danny
-------------- next part --------------
Installing CRUX 2.7.1 on a VMIVME-7648 Single Board Computer

Create a Bootable CD

First, download the CRUX 2.7.1 iso from To
create a bootable CD use OSX and burn the image using the following command:

    $ hdiutil burn crux-2.7.1.iso

Installing CRUX

Now, hook up a CD ROM drive to the SBC and reboot it. Make sure to press F2 to
get to the BIOS set up and set the correct date and time, and set the boot
order to boot from the USB drive first. I could only get the computer to
recognize a keyboard plugged in via USB and not with a PS/2 keyboard, although
later during the installation it would only recognize a PS/2 keyboard and not
the USB one, so I recommend having both plugged in while installing CRUX.

The computer should boot to a CRUX screen with just the word "boot:". Press
ENTER and login as root. First we need to partition the hard drive.

    $ fdisk /dev/sda

Delete all existing partitions and then create three partitions for /, swap,
and /home. If you are using an 8 GB flash card for storage, I would suggest the
following sizes for each partition:

- 5 GB for /
- 1 GB for swap
- the rest for /home

After writing the changes:

    $ mkfs.xfs -f /dev/sda1
    $ mkswap /dev/sda2
    $ mkfs.xfs -f /dev/sda3
    $ mount /dev/sda1 /mnt
    $ swapon /dev/sda2
    $ mkdir /mnt/home
    $ mount /dev/sda3 /mnt/home
    $ setup

After running setup the CRUX installation should start. Just press ENTER to
accept all the default options. Then,

    $ setup-chroot

Now, edit /etc/fstab to look like the following:

    /dev/sda1   /       xfs     defaults    0   0
    /dev/sda2   swap    swap    defaults    0   0
    /dev/sda3   /home   xfs     defaults    0   0

Modify /etc/rc.conf:

    SERVICES=(net crond sshd)

Modify /etc/rc.d/net and add the ip address of the computer and the gateway.

Add DNS servers to /etc/resolv.conf.

Add the following to /etc/hosts.allow:

    sshd sshd1 sshd2 : ALL : ALLOW

Now, it's time to compile the kernel.

    $ cd /usr/src/linux-
    $ make menuconfig

Now, we need to enable a few drivers to be built in rather than as modules.
Navigate to Device Drivers and then press y on the line labeled Serial ATA and
Parallel ATA. Then navigate into that submenu and press y on the line labeled
"Intel ESB, ICH, ...". Go back to the main menu and select Processor Type and
change it to "Pentium III". Exit and save the changes. Finally edit
.config to enable a few more drivers to be built in.

    $ vim .config

and make sure that the following three options look like this:


Now, time to compile the kernel:

    $ make all

And go grab a cup of coffee at Tim Hortons. After it finishes:

    $ make modules_install
    $ cp arch/i386/boot/bzImage /boot/vmlinuz
    $ cp /boot/

Finally, edit /etc/lilo.conf to look like:


Run lilo:

    $ lilo

And reboot, remembering to change the boot order back to the HD at the BIOS!

Installing the VME Drivers

First, we have to install git. Log in as root, download and install git:

    # curl -O -L
    # tar -xzvf v2.7.0.tar.gz
    # cd git-2.7.0
    # make configure
    # ./configure --prefix=/usr
    # make all
    # make install

Now, download the VME drivers and install:

    # git clone
    # cd VMELinux/driver
    # make
    # make install

If after make install you get a warning about "Device Busy" or something, then
you need to edit /etc/rc.d/universe and change the size_to_reserve and
reserve_from_address lines. To find out what size and where to reserve from,
open up /proc/iomem and look for a large gap in the allocations:

    $ less /proc/iomem

I found a gap in the PCI Bus 0000:00 line. For example:

    00000000-0000ffff : reserved
    00010000-0009f3ff : System RAM
    0009f400-0009ffff : reserved
    000a0000-000bffff : PCI Bus 0000:00
      000a0000-000bffff : Video RAM area
    000c0000-000c7fff : Video ROM
    000d0000-000d3fff : PCI Bus 0000:00
    000d4000-000d7fff : PCI Bus 0000:00
    000d8000-000dbfff : PCI Bus 0000:00
    000dc000-000dffff : PCI Bus 0000:00
    000e0000-000fffff : reserved
      000f0000-000fffff : System ROM
    00100000-7f66ffff : System RAM
      01000000-012147f0 : Kernel code
      012147f1-012ee97f : Kernel data
      01334000-01352fff : Kernel bss
    7f670000-7f6fffff : ACPI Non-volatile Storage
    7f700000-7fffffff : reserved
    80000000-febfffff : PCI Bus 0000:00
      80000000-801fffff : PCI Bus 0000:05
      80200000-803fffff : PCI Bus 0000:04
      80400000-805fffff : PCI Bus 0000:02
      80600000-807fffff : PCI Bus 0000:01
      80800000-809fffff : PCI Bus 0000:01
      80a00000-80a00fff : Intel Flush Page
      d0000000-dfffffff : 0000:00:02.0

In this case, there is a gap at 0x90000000 so I added the following lines to


Then you should be able to start the universe driver:

    $ /etc/rc.d/universe start

Finally add universe to /etc/rc.conf:

    SERVICES=(net crond sshd universe)

Now, we can install the VME universe API:

    # cd VMELinux/universe_api
    # make
    # make install

By default, it installs the header files into /usr/local/universe/include and
the library in /usr/local/universe/lib.

Test Program

To test if the VME drivers are working properly, here is a short example
program to communicate over VME:

#include <stdio.h>
#include <universe_api.h>
#include <stdint.h>

#define BASE_ADDRESS 0x550000
#define ADDRESS_MODIFIER 0x9 // A32 bit addressing
#define DATA_WIDTH 4 // 32 bit data
#define REGISTER 0x1900

int main(int argc, char **argv)
    TUVMEDevice *dev;
    uint32_t value;
    int nbytes;


    dev = get_new_device(ADDRESS, ADDRESS_MODIFIER, DATA_WIDTH, 0x10000);

    if (dev == NULL) {
        fprintf(stderr, "dev = NULL\n");
        return 1;

    if ((nbytes = read_device(dev, (char *) &value, DATA_WIDTH, REGISTER)) != DATA_WIDTH) {
        fprintf(stderr, "read_device returned %i bytes\n", nbytes);
        return 1;

    printf("value = 0x%4.4x\n", value);

    return 0;

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