I posted the above information on a German forum with several alphatronic owners, and one guy who has a P3 that has been expanded with the P30's coprocessor cards, posted his version of MS-DOS for the P30. It's running on an 8088 that has a 128 RAM extension card connected to it.


This user dumped his P30's ROM


and a picture of a third "mystery" card that belongs in a P30.

Here are pictures of a P30 booting DOS:


plus a very handy guide about the correct order to plug in the P30's cards.

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