Wandboard Quad SPL/u-boot?

Having recently acquired a Wandboard Quad, I am hoping to run RISC OS on it. Other OS installation involves adding SPL and u-boot files to the SD card before the start of the first partition.

With an SD card set up using SDCreate, there is nothing on the HDMI-connected monitor and no output over serial. Advice / suggestions from Wandboard users here welcome!

The notes for SDCreate make no reference to this for Wandboard, though other boards require u-boot and x-loader to be added to the ‘create image’ fields. Do I need to add u-boot and SPL somewhere?

With an SD card set up with Debian ‘buster’, using the armhf installation instruction, I see the following over serial:

U-Boot SPL 2021.01+dfsg-5 (May 23 2021 – 04:32:45 +0000)
Trying to boot from MMC1
MMC: block number 0×8b exceeds max(0×0)
mmc_load_image_raw_sector: mmc block read error
MMC: block number 0×1 exceeds max(0×0)
MMC: block number 0×1 exceeds max(0×0)
spl: no partition table found
SPL: failed to boot from all boot devices

1. ERROR ### Please RESET the board ###

Is this a dead board, or have I missed something obvious? The SD card is in the slot on the CPU board, which I understand is MMC1. Tried two SD cards (both Sandisk Ultra 8GB) which show no problems in the PC (Linux) or Pi (RISC OS).

There’s some info in !SDCreate.scripts.Wandboard.txt.

Only the risc os rom and optional CMOS are needed.
A small empty fat partition is also created. If you can see this on another machine it should confirm that SDCreate worked.

Thanks, Chris, for confirming. Guess there is a more fundamental issue as it’s not booting with any of the Linux installation setups I can find either.