Hi all,
this is the Z80-MBC2, an easy to build 4ICs Z80 multi-boot system with 128KB banked RAM, CP/M 2.2 and 3, QP/M 2.71, Disk on SD, RTC, 16 GPIO, I2C, cross Assembler toolchain, cross C compiler toolchain (with SDCC):
Here Z80-MBC2 playing Startrek with CP/M 2.2:
...and some more photos:
More info
here.