iPAQ H3600 Linux Update Instructions - v0.20

WARNINGS:

• If this installation fails then your iPAQ could become (temporarily) unusable.

  This version is very unlikely to result in an installation failure. We are trying very hard to make this procedure bullet proof, and we think we're there with the boot loader. The boot loader can not be overwritten by accident; it does an end to end checksum before writing flash, and short of losing power during the actual writing of flash memory, an unlikely scenario, is believed bullet proof. Some additionial bug is certainly possible, but we think it is unlikely. If you have not upgraded your boot load to version 2.13.2 or later, please do so immediately.

  Compaq Research will ensure that you do not permanently turn your iPAQ into a paperweight, but it is very inconvenient for all of us if we have to fix a unit that was rendered nonbooting by a failed installation (or WinCE restoration).

• Windows CE Restoration

  If you save an image of your Windows CE software as described in the WinCE restoration instructions then you will be able to restore it again after installing Linux.

  The restoration process is not simple. It is error-prone. Be extremely careful. But it is available. We will help anyone who has trouble with it.

  We are working on an improved process, but it is not ready yet.

  WinCE has been successfully restored by many people on many different iPAQs. The current status of the save / restoration of WinCE is available at http://www.handhelds.org/projects/wincerestoration.html.

• Errata

  • Some web browser's default download settings is 'ASCII' mode instead of 'binary' mode, this will make the downloaded files corrupt. For example, Netscape requires that you hold down the shift key when you click on an item for downloading in 'binary' mode.

    WARNING: Please verify the 'md5sum' of any file before using.

  • Unless you really really know what you are doing, do not mix kernels, ramdisk and cramfs files from different V0.?? releases. Each version can have different memory mappings.

Requirements:

• A computer that runs Windows 95/98/2000/NT. A few people have installed Linux on the iPAQ using a Linux computer. There are Linux conectivity instructions at http://www.handhelds.org/minihowto/wince-link/index.html and http://www.handhelds.org/pipermail/ipaq/2000-Auguest/000061.html
  • Install the ActiveSync application (Async) from the iPAQ H3600 Pocket PC distribution CD that came with your unit onto your Windows system.
  • You will also be using HyperTerminal (or other terminal emulator capable of the xmodem protocol, such as minicom on Linux.
• The following files from URLBASE:
  • init-2-70.cramfs
  • init-2-70.cramfs.md5sum
  • root-2-57.cramfs
  • root-2-57.cramfs.md5sum
  • usr-2-61.cramfs
  • usr-2-61.cramfs.md5sum
  • zImage-2.4.0-rmk2-np1-hh1
  • zImage-2.4.0-rmk2-np1-hh1.md5sum
  • bootldr-0000-2.13.2
  • bootldr-0000-2.13.2.md5sum

• iPAQ H3600 with a serial cable (USB is NOT supported at this time). For those of you that can not wait for a serial cable (they are now often in stock at various distributors if you look around for them), Peter Monta has instructions for a home made cable which invalidates the warrenty on the base station at http://www.handhelds.org/pipermail/ipaq/2000-Auguest/000061.html

Installation:

1. Plug your iPAQ into the serial port of your Windows machine using a serial cable.
2. Run your terminal emulator on whatever machine can talk to your serial port with the settings of: 115200 8N1 (115200 baud, 8 bits, No Parity, 1 stop bit) and Flow control: 'None'.
3. While booting the iPAQ, in your terminal emulator, hit the space key on your keyboard on your machine: you should see a 'boot>' prompt. You can type 'help' at the bootloader at the 'boot>' prompt to get a list of commands.
4. This one step is dangerous: do so with the unit under AC power (so that even if your battery happened to fail that instant, it wouldn't matter). At the 'boot>' prompt, type 'load bootldr', then start an xmodem download of the file bootldr-0000-2.13.2. A bootldr tarball corresponding exactly to these boot loader bits is available. Note this is a new version of the bootloader, which should work better with some xmodem implentations and worth updating.
5. Your iPAQ will say "verifying ... done.". The loader program has a simple sanity check in it (it verifies a checksum contained in the bootldr file) to ensure that only a bootloader can get installed into flash at the iPAQ's bootloader's address.
6. Be paranoid. Make sure the bootldr flash sector is protected:
   • qflash 2
   • should print 00010001.
   • Otherwise, protect the flash sector manually.
   • pflash 0 0xffff 1
7. Proceed to the instructions in update.html for the rest of the linux installation.

Note: if you need to get back into the boot loader after you have Linux running, restart the iPAQ and quickly hit the space bar a few times during the boot process. You can restart the iPAQ with the Linux command shutdown -r now.

If you have any problems, please post to one of the followig lists:

General problems with setup, installation, user-land software or configuration: ipaq@handhelds.org.

Issues believed to be related to the kernel: linux@handhelds.org.

Thank you.

Modified Friday May 11, 2001

Please send comments on this document to Jamey Hicks (jamey.hicks@compaq.com).