Installing OpenBSD on the Pomera DM250

These are my notes and pre-built images for getting OpenBSD-current installed on the Pomera DM250, DM250X, DM250XY, and DM250US. Table of Contents Top Throat-clearing Making a backup Some DM250 hardware notes Making an OpenBSD installation SD card Installing OpenBSD Post-Installation Building a custom installation ramdisk Recovery Throat-clearing Much of my work has not yet been committed upstream so installation currently requires a custom kernel and U-Boot images which are provided here. OpenBSD support is still improving and may not be stable at any given time. Install at your own risk. These risks include: If the battery completely drains due to a software bug, the device may not power on correctly and will not be able to recharge its battery (see below). If the device cannot boot properly into U-Boot, you may need to recover it through a USB cable which may also require having to open the device (see recovery). Making a backup This is optional but recommended. The tools and…