This is the only Blaster prototype known to exist. Notice
the odd EPROM board that was used? It is reminiscent of
Colecovision style prototype boards. This prototype was
complete and ready to be released when Atari decided to stop all
support for the 5200.
If you look very closely at the EPROM labels you'll see they
have the number '2084' on them. This is because they are
really recycled Robotron: 2084 EPROMs that were left over from
when Vid Kidz were working on the Robotron arcade game.