I'll give it a shot later. I have prepared a disk image with a collection of all the different HDINIT versions.

https://dl.dropboxusercontent.com/u/55419307/Siemens%20PC-D/pcd_collection.mfi


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20