Some of these look very handy. Great work. I am going to play with the sound test to explore the noises in each sound ROM. The CMOS clear is useful for a system 7 board running older software and NVRAM as switching between games leaves you no easy way to clear the RAM on the board.
Since there is sixteen 2716 images one could build a 27256 EPROM board with a 4 position dip and pullup resistors to bank switch between each test rom.