https://www.globalscaletechnologies.com/p-88-espressobin-ultra.aspx
Just got my hands on one of these. Looking at the existing targets the Espressobinv7-emmc target probably includes most if not all of the same hardware (cpu, ram, switch) but the patch seems to indicate it still depends on micro-sd for booting
commit de3387654b5b65dcd9029d68c8c2fab29f6fef84
Author: Tomasz Maciej Nowak <tomek_n@o2.pl>
Date: Sat May 11 19:37:35 2019 +0200
mvebu: add images for additional ESPRESSObin boards
This commit adds support for different iterations of ESPRESSObin.
The added variants are:
ESPRESSObin with soldered eMMC,
ESPRESSObin V7, compared to V5 some passive elements changed and ethernet
ports labels positions have been reversed,
ESPRESSObin V7 with soldered eMMC.
Please refer to:
584d7c5 ("mvebu: new subtarget cortex A53")
for instruction how to boot OpenWrt image placed on SD card. It is
advised for owners of V5 and previous with bootloader based on U-Boot
2015.01, to upgrade the latest version available at:
http://espressobin.net/tech-spec.
Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>
The ultra does not have a microsd card slot so booting from the emmc is mandatory. I'm tempted to just try writing the sd-card image using dd and see what happens.