[ghaerr]

Yes it runs on that Amstrad. A funny story about the Amstrad, at one point we added divide-by-zero trap handler in the kernel for user space apps. When the Amstrad reboots via our 'shutdown', its gets a div zero exception in its own BIOS (which at the time prohibited the reboot, lol).

[kolleykibber]

I'm having a play on the PPC640 with a Gotek running Flashfloppy with fd720-fat.img

It's erroring after the mount with panic:No init or sh found SYSTEM HALTED. BOOT:

The computer is unreponsive at the boot: prompt.

I've tried a few different settings in the ff.cfg, but no joy. Could it be a Gotek issue?

[ghaerr]

Open up an issue on GitHub and we can help you better. The usual reason for problems like this is the layout of the image is incorrect on GoTek, and/or the GoTek is set to the wrong CHS (cylinders/head/sector) for the image being used.

[ghaerr]

Also worth trying would be the 1440k image, as that's the later standard 3.5" floppy format.