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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Received on Tue Nov 8 03:59:19 2005
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