This is the doc for the WD2793 Floppy disk controller used in the Siemens PC-D
https://dl.dropboxusercontent.com/u/55419307/WD2793%20datasheet.pdfIt would be great if the PC-D could benefit from the recent changes to the 80186 driver and be broken out from PC compatibles into a seperate driver (it uses no standard PC bus and can not boot from generic MS-DOS floppies).
Robert