LITEON 9504 question about old 9504 chip set

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LoneWolf913

did the 9504 boards comes with number 5 chip set
If by 'number 5 chip set' you mean Winbond, yes, as far as I know it's a mixed bag buying a 9504, you may get an MXIC or you may get a Winbond.
 
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LoneWolf913

so the 9504 winbound you could write to them before the updated it to 0272
Yeah, I believe you could, there are OEM unlocked 9504 pcbs out there from systems that just never got updated to whatever dashboard started locking them.