That is a standard TMS 600 CPU board. The top chip on the far right of the 3 is NVRAM. The next chip to the left is the RAM chip, The 3rd chip is the Program chip, a 4meg EPROM.
The empty sockets are optional chips.
The chip on the bottom is a 2meg EPROM. (Communication) The Battery backed ram chip (NVRAM) stores all your parameters.
