Stopping the clock on a 68000 system

May 02, 2006 2 Replies

I have this in-circuit IC tester that requires that I stop the clock by removing the cpu which I can't do because it is soldered in. How would I go about stopping the clock in a safe way? This is a arcade game board and has a few cristals on it. Do I just ground the clock off of the cpu or can I ground one of the pins off of the cristal? There are a few CPU's on this board. One 68000 and one Z80. Thanks for the help



Will using the "Hault" pin on the cpu stop the clock on the whole system? And do I just ground it or do I have to use a resistor or some other way to get that pin low. This is on the 68000. Thanks for the help Uriah

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