MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
 AM27C1024 Verification Failure		  New Topic  Reply to Topic
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Murray

USA
4 Posts
Posted - 08/18/2009 :  20:03:15  Show Profile  Reply with Quote
I am trying to program two AM27C1024 chips with a GQ-4X 1.30. I have USB driver 2.0 and software 4.03.

Both of these chips constantly fail verification at different locations. I run a blank check, then write, then verify. I have tried different write speeds and using "double write" but nothing seems to help. I also have tried with an external power supply.

What can I do to get this working?
Reply #1

Murray

USA
4 Posts
Posted - 08/19/2009 :  11:12:50  Show Profile  Reply with Quote
A little extra info. I can program a NMC27C512AQ-150 that doesn't need the adapter just fine.

I guess these 27C1024s could just be bad chips but I find it odd that both of them would be defective.
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Reply #2

ZLM

2945 Posts
Posted - 08/21/2009 :  00:47:46  Show Profile  Reply with Quote
It could be the chip problem. Try other brand new chips.
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