Re: James has been busy!

Another hint... every now and then I'll either get a ROM that has a bad signature, replace it and it still has a bad signature. OR I will get all ROMs reported as bad. Usually that's a pretty easy chip select problem. I find that the 9010A probe narrows these types of problems very, very quickly. JB ---------------------------------------- From: Martin White <martin_at_guddler.co.uk> Sent: Wednesday, September 14, 2005 2:55 AM To: Technical Tools Mail List <techtoolslist_at_flippers.com> Subject: Re: [Techtoolslist] James has been busy! > By the way, can someone explain the difference between a fluke > signature and > a checksum? Sometimes my fluke reports a bad rom signature, but that > doesn't necessarily mean the rom is bad does it? > > Matt No. But it does mean that EITHER the rom, or the circuitry going to or from the rom is bad. Pop the rom out, dump the rom, then use fluke IDE to calculate the signature of that rom dump and make sure it's what you were expecting. Then if it wasn't then the rom is bad, else start looking at address and data buffers and chip selects and the like. Martin. _______________________________________________ Techtoolslist mailing list Techtoolslist_at_flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist

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Received on Wed Sep 14 07:56:12 2005