The    A   T  O  M    mainboard   (± 37 x 22 cm)

On one side is the QWERTY-keyboard and on the other side the parts are situated. Below, the soldering-side. See also the partslist.

From left to the right, you can see on top of the board the extension bus, the parallel printerport, the cooling device from the power-regulators, the powerplug, the cassetteport and the UHF modulator for the output to a TV-set. On the right-hand side, just under the UHF modulator you can see the already extended video-memory. On the left, under the red wire, the workspace-memory. The diagram and the layout of the board is available on the download page.