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Author Topic: Problem with correct rom and "ffffffff"  (Read 3721 times)

oddi

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Problem with correct rom and "ffffffff"
« on: 08 July 2014, 16:31 »

Hi Roman, me posted problem from other forum:
Clrmame say rom with 0xffffffff it's not correct
Me post scrrenshots and attach this "correct" rom for test.

Tnx :)
« Last Edit: 08 July 2014, 16:31 by oddi »
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Roman

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Re: Problem with correct rom and "ffffffff"
« Reply #1 on: 08 July 2014, 18:23 »

Well...yes....of course a crc of -1 or 1 or is as common as any other value but in the past some people used to use this value as a placeholder for a checksum which was not known....

So...there is this check for "suspicous checksum values" ...and you're asked how to handle it....now in this case you should simply answer "no"...then it's taken as it is and is not transformed into a nodump.



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oddi

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Re: Problem with correct rom and "ffffffff"
« Reply #2 on: 08 July 2014, 18:32 »

Ok Roman, many tnx for answer :)
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Roman

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Re: Problem with correct rom and "ffffffff"
« Reply #3 on: 08 July 2014, 18:43 »

maybe I remove the check in the future ...time will tell
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