Hallo Wilfried,

Ich zitiere:
..The "frequency-counter" actually measures 1.1 MHz, but taking into account inaccuracies in the test-probe, it could be a 1.2 MHz system. This would give a divide-by-3 clock system. It appears to be based on the 74LS74 chip, which is used for such jobs as clock-division. The use of a CPU and crystal is pure selling technique, i think. 98% of people purchasing a chess-computer don't know the difference between a diode and their left-foot !......Let alone a 3.6 MHz crystal and a CPU ! Either way....the frequency-counter is a "philips" high quality unit. And it measures the 8-MHz at near enough bang-on, so it MUST be telling the truth

Gruß,

Christian

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Fidelity rules.