I digged up the A1060 sidecar and connected it to my spare A1000. While it booted fine, it did not recognize the floppy diskdrive. So I thougt I format and prepare a harddisk, connect it to the ISA CD adapter, and hope the Sidecar would boot from it. It didn't. It repeats bleeping when the floppy diskdrive is needed, the drive's light blinks for two seconds and it starts over to check the RAM. And over and over again.
I now believe the floppy disk drive is faulty. As I have no spare I need to get one.
To be continued.