MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X, GQ-3X, GQ-4X)
 35080-3 not writable 0200h-03FFh
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Posted - 05/29/2018 :  10:41:49  Show Profile  Reply with Quote

Looking to find a software fix for an issue detected whilst trying to re-write to a previously programmed 35080-3. The data I wish to modify is located at 0200h.

Neither my GQ-4x or GQ-4x4 are able to modify this region. I checked the datasheet and can see that the status register bits, specifically BP1 and BP0 should be set to zero by the programmer in order to unprotect the "upper half" array from 0200h-03FFh. Can the software be fixed? I'm assuming the later version 7.20 would be rectified?

Please advise?
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