MCUmall EPROM BIOS Chip Burner Forum
MCUmall EPROM BIOS Chip Burner Forum
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 Open Source Project Willem Programmer Hardware
 Cant write to 27C322 Eproms
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topgeargames

Canada
27 Posts

Posted - 11/25/2011 :  21:58:14  Show Profile  Reply with Quote
hey, i have tried to write to multiple eproms of the 27C322 type, all with no luck. I am using a 18V ac power supply, and have also tried it with a 12V supply.

The chip is recognised and blank check shows its empty, and then when i go to write to it it writes all the wrong bytes of code!

Every last byte is wrong. but it manages to write the entire chip.

What am i doing wrong?

Im using willem version .98D5 on PCB50.
Reply #1

topgeargames

Canada
27 Posts

Posted - 11/30/2011 :  13:04:53  Show Profile  Reply with Quote
Come on people! this site doesnt have much for forum activity do they... I am in need of any answers here. I cant find out any information, ive done extensive searching on the web and cant seem to find anything out. Seeing as this site is for people who use eprom programmers i expected a better turn out
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Reply #2

ZLM

2936 Posts

Posted - 11/30/2011 :  20:20:01  Show Profile  Reply with Quote
If it only the last byte wrong, then looks like software related. Try use other software version. Like 0.97j version.
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Reply #3

topgeargames

Canada
27 Posts

Posted - 12/01/2011 :  09:51:29  Show Profile  Reply with Quote
No ZLM you miss read that. EVERY byte is wrong. i meant all of them. I even tried a different programmer (GQ-4X) and it fails at the same spot every time. Im using the ADP-054 adapter with the 4X and still nothing. Heres what happens:

"Chip is blank
c:\users\downloads\test.bin.
Speed = 3
ID check skipped
Writing... Code
Elapsed time: 2.44 seconds.
Write failed, Address=0x000000, Buffer=0x4C Device=0x48
Write failed"

It fails at the same place every time. I bought the GQ4x because i thought my willem was faulty, but now the 4X is failing too so i dont know what to do...
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Reply #4

ZLM

2936 Posts

Posted - 12/05/2011 :  22:24:12  Show Profile  Reply with Quote
The adapter is wrong in this case.
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Reply #5

topgeargames

Canada
27 Posts

Posted - 12/07/2011 :  15:35:05  Show Profile  Reply with Quote
Thanks for your help so far ZLM.
So you think the adapter is faulty? That sucks, i bought it from MCUmall and it hasnt worked since i got it, so i guess it makes sense that it could be faulty.

Is there a different adapter you would recommend?
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Reply #6

ZLM

2936 Posts

Posted - 12/15/2011 :  11:29:46  Show Profile  Reply with Quote
This is the only adapter for this chip.
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