Unfortunately the keyboard controller ROM dump turned out to be bad - TeamE to the rescue, he dumped the 8049 of the first machine and the 8278 of another that I've acquired in the mean time with consistent results. Thanks!

The ROM dumps are on the FTP and here:

TA Alphatronic P3 ROM dumps (new)

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