The digi design board is a Motorola 56001 DSP as used in the Falcon, primarily used with Digi design - Sound Tools - a 2 track audio editor.
This board also has a Scsi connector on it for connecting to the Digi Design Digital Inteface, like an FDI on the Falcon.
I'm not sure whether you can use this DD board on a regular st? no expansion port? might be wrong?
If it does come to life i think you will be able to find a replacement keyboard from somewhere, maybe a pc key with an adapter?
Good luck!
Gwiz
If any one wants to suggest anything for my Mega 4? It also has a Digi design board fitted!(hence my apparent knowledge)
Previous owner reported that ' it just stopped working' 1988 till about 1998!?