Vampire boot v1.0.0 has just been released here
https://github.com/henrikstengaard/v...-boot/releases. The readme here
https://github.com/henrikstengaard/vampire-boot has tutorials to install and configure it.
I currently use it in A600 internal IDE port to mount and boot partitions on SD card installed in Vampire accelerator card. It works and might be a crazy side project, but it solved my need to boot from Vampire SD card and make it easy to adjust, if partitions or SD card is changed.