There are two boards, both with blue or green solder masks. The top one (slightly
larger) is the CPU board, has the 4 processors and program EPROMS, and holds a
small credit-card sized daughter board that plugs into a 28-pin DIP socket near
the EPROMS. It also has 'DG-09-2' silk-screened in one corner near the main
connector. The bottom board is the video board. It has a small 5-pin connector
in one corner for the video output signal, wired as shown on the right.
Zig Zag Notes:
These are two boards very similar to the boards above. The CPU board is labeled
PCB-X and appears to be the same as the Gallag CPU board. The Video board
is labeled PCB-Y, and also has a daughter card, this card is labeled NV284/N0015 and fits into two narrow 20-pin sockets. The video board also has the same 5-pin video connector as Gallag. The pinouts
are the same with the addition of the Up and Down joystick connections
for both players.