This gets olitest running (from Chris' site)
The options on the top of the display are probably meant to be displayed line by line as that is the way the arrow moves.
I wonder whether there is something still wrong with our disk definitions ... several images from Chris' site boot, but do not load programs from disk, displaying error 92 (command not found).
The PCOS error messages can be found in http://maben.homeip.net/static//S100/olivetti/PCOS/PCOS.pdf
BIOS versions 2.d and 2.f don't boot from any floppy, but display "Disk error 04 on drive 0" ... and and the MSDOS for the alternate processor board isn't recognized as a valid image.