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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Electronics query re 68000 CPU
What's the best way to pause a 68000 CPU? I'm diagnosing an old game
PCB and want to pause the screen so I can concentrate on fixing a hard to track down graphics error. Pausing it would help immensely. No doubt I'll also have to disable any watchdog otherwise it will just reset. Thanks |
#2
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Electronics query re 68000 CPU
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#3
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Electronics query re 68000 CPU
On Fri, 29 Jan 2010 07:04:22 -0500, JW wrote:
On Fri, 29 Jan 2010 11:59:52 GMT (jamma-plusser) wrote in Message id: : What's the best way to pause a 68000 CPU? I'm diagnosing an old game PCB and want to pause the screen so I can concentrate on fixing a hard to track down graphics error. Pausing it would help immensely. No doubt I'll also have to disable any watchdog otherwise it will just reset. Thanks Drive the *HALT line to a logical 0. Thanks - could I just Ground it? Or should I use a resistor? |
#5
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Electronics query re 68000 CPU
On Fri, 29 Jan 2010 09:30:13 -0500, JW wrote:
Thanks - could I just Ground it? Or should I use a resistor? You could try a 1K resistor without hurting anything. Do you have a schematic of the circuitry in question? What does the *HALT pin connect to? No schems I'm afraid. Guess I could just try it - will do later. Thanks |
#6
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Electronics query re 68000 CPU
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