Picture of a German A4000 Keyboard. (QWERTZ)

Hi Res Version (1093 x 393)

The A4000 uses a small 6pin DIN connector (PS/2 style, but is not PS/2 compatible)

Pin	Function
1	I/O
2	Not Connected
3	GND
4	+5VDC (100mA)
5	Clock
6	Not Connected

Thanks to Gruber Kristof