it's a little 68000 board, equipped with RAM, ROM, UART, PIT
inside the ROM there is a "monitor", able to read/write/show registers and to upload programs over the serial line
this board comes with documentation (schematic, and detailed description)
I am asking 60 euro plus shipping
it requires +5V, and +/- 12V
I can give you a tricks to "build" a DC/DC in order to provide +/- 12V with a single 5V source
have fun