You might have a switch that isn't "on" when it says it is. Matt Rossiter wrote:
I just bought the Willem Eprom Programmer. I am hoping someone can help me out with a couple of easy questions about setup. I think the version I have is called PCB3 . I think this one has added support for earlier eproms like 2716 and 2732.
Let s say I just want to do a simple blank check on a 2716 eprom.
Step 1: Verify that it s blank on my Data I/O just to make sure. Ok it s definitely blank.
Step2: Connect the Willems eprom programmer to my computer using the Parallel port. Ok. All the lights are on and look good.
Step3: Bring up the Software. Click Device -> EPROM -> 27XX -> 2716 Ok
Step4: Click the button that says Willem so that it changes to PCB3 (since that s the board I m using) OK
Step5: Set the Jumper switches according to the diagram in the software Ok
Step6: Put in the chip and click Blank Check
Am I missing any steps? I keep getting Device not Empty
Furthermore if I read the eprom, store the data to a binary file and try to verify it with Romident it fails.
Or if I load an eprom from a file and then compare it with a rom with the same code it fails. I ve tried this with 2716, 2732, 27c4001 and 27c010.
So I think I must be doing something wrong.
Could someone offer me some help?
Thanks!
Matt
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