For “THEA500 Mini” Siegfried Hübner describes how to run also Atari ST programs on this rebuild of the Amiga 500 by Retro Games Ltd. It requires  EmuTOS-Amiga.ROM and AmiBerry.

In hist post, he warns that to avoid a flickering display, open the Amiberry menu and change Display Line Mode from “Single” to “Double”. The .st floppy disk images are compressed with GZip, so that, for example, the file disk.st becomes disk.st.gz instead.

Link: Emutos on the A500 Mini (atari-home.de)

Source: Amiga News