[Techtoolslist] The Age Old - "What Eprom Programmer should Iget"question

[Rodger Boots]

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

>