MCUmall EPROM BIOS Chip Burner Forum
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 M27C256B File Offset problem
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erps

USA
3 Posts

Posted - 05/08/2015 :  05:26:15  Show Profile  Reply with Quote
I have loaded an HEX file with the corresponding File Offset 8000.
However, when I check what is in the buffer by clicking on the Code tab, I see addresses from 0000 to 7FF0 filled with FF, but can't scroll down to see from 8000 to FFFF, where the code is supposedly to be.

So when I program the chip, it doesn't do anything because the chip is being programmed with FFs. What I am doing wrong?

Thanks,
Reply #1

ZLM

2923 Posts

Posted - 05/13/2015 :  15:31:50  Show Profile  Reply with Quote
The chip only has maximum address up to 7FFF. So, no way to see beyond the that point.
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Reply #2

erps

USA
3 Posts

Posted - 05/13/2015 :  16:24:56  Show Profile  Reply with Quote
quote:
Originally posted by ZLM

The chip only has maximum address up to 7FFF. So, no way to see beyond the that point.



Ok, so what I need to do to see the code between 0000 and 7FFF?
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Reply #3

ZLM

2923 Posts

Posted - 05/14/2015 :  17:58:59  Show Profile  Reply with Quote
If you set the file offset in software, then the software load the data starting from 8000. If the data beyond that location, then software will ignore it.

If your file has build in offset 7FFF, then you need to put file offset value to -7FFF, in that case, the software load the data from 000.
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Reply #4

erps

USA
3 Posts

Posted - 05/19/2015 :  08:56:39  Show Profile  Reply with Quote
quote:
Originally posted by ZLM

If you set the file offset in software, then the software load the data starting from 8000. If the data beyond that location, then software will ignore it.

If your file has build in offset 7FFF, then you need to put file offset value to -7FFF, in that case, the software load the data from 000.



It worked by entering the File Offset -8000
Thanks for the tip.
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