Whatcha got? I've still got some CP/M machines here too.
Z-100. Dual processor (8085 and 8088), S100 bus, 640x512 color graphics.
The interesting bit is that CP/M itself runs on the 8088, while the application runs on the 8085, and there's some hardware for doing system calls between the two. That gives pretty much all of the 64k address space to the application.
-Dave