GoKawiilThese are my notes and pre-built images for getting OpenBSD-current installed on the Japanese-model Pomera DM250, DM250X, and DM250XY.
Throat-clearing
Much of my work has not yet been committed upstream so installation currently requires a custom kernel and U-Boot image 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).
Note: Do not use these instructions for the US-model DM250US yet. That device has a different power charging chip and keyboard layout.
Making a backup
This is optional but recommended. The tools and instructions at EKESETE.net should be used to make a full eMMC backup before doing anything.
Some DM250 hardware notes
The DM250's factory U-Boot detects Right Shift + Left Alt being pressed immediately after power-on and boots the recovery Linux kernel from its recovery_kernel partition instead of its normal kernel partition. The recovery kernel boots the initramfs image at the recovery_boot partition which mounts the SD card and executes any _sdboot.sh script found at its root directory.
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