I'd like to discuss VME boards here. VME based systems are highly modular and was introduced early 80ies as a standardized continuation of Versabus. At first only 68000 family was supported but over the years many CPU types and i/o boards were adapted and the latest standard even support 64bits aka VME64. I intend to contribute drivers for a few early ones suitable for emulation. If you sit on information or ROMs fitting this description please let me know.
First out is Force Computers CPU-1 for which I have just filed a pull request. Or you can grab it at https://github.com/JoakimLarsson/mame.git
layout files and instructions are found here: https://drive.google.com/file/d/0B685nj_1DkdueXdLR2N4STd4RWs/view?usp=sharing