Download ULN-2 User's Guide

Mobile I/O ULN-2 User’s Guide – Appendicies
Rolling back your firmware
If you find that you have problems with any given release, you can always go
back to a previous release by downloading a package from
http://www.mhlabs.com.com/mio
and following the update instructions in that package. Please do not roll
back the firmware to an earlier version than was originally supplied with
your unit unless instructed to do so by Metric Halo.
Instructions on the OS 9 only MIOBootInstaller Tool (obsolete)
Metric Halo provides a firmware update tool that allows you to download an
updated firmware image to the Mobile I/O from your computer. The following section describes how to use the previous, Mac OS 9 only version of the
firmware update tool, called MIOBootInstaller.
You may have had the experience of updating the firmware for your computer in the past. As you may know, this can be a stressful procedure, since
there is a moment while the old firmware is being replaced by the new firmware, and if the process is interrupted you may be left with no firmware at
all. Metric Halo has addressed this issue with a “safe firmware update” procedure. The Mobile I/O uses a dual-boot procedure. The first boot happens
in the first 100ms (about 0.1 seconds) and has been extensively tested. It is
smart enough to do two things:
1. It can boot the secondary boot image
2. It can update the secondary boot image over the FireWire bus
Actually, the primary boot firmware is much smarter than that. The box is
completely functional on the primary boot, but all of the more advanced features of the box are enabled by the second boot. The firmware revision of the
primary boot is 1.1.0.
As soon as the primary boot image has booted, it checks the secondary boot
image, and if the secondary boot image is installed and not corrupted in any
way, the system immediately boots the secondary image. If the secondary
image is corrupted or if you have held down the front-panel Mute button
during the initial boot process, the Mobile I/O will not boot the secondary
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