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

[John Robertson]

Hi Matt,

What result do you get when you try to read a truly 'blank' Eprom 
(otherwise known as nothing in the test socket)? Perhaps that will 
give you a clue...

John :-#)#

At 8:54 PM -0800 11/7/05, 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

>

>

>From: techtoolslist-bounces at flippers.com 

>[mailto:techtoolslist-bounces at flippers.com] On Behalf Of Bill Karkula

>Sent: Saturday, October 29, 2005 5:50 PM

>To: Technical Tools Mail List

>Subject: RE: [Techtoolslist] The Age Old - "What Eprom Programmer 

>should Iget"question

>

>I kept my workhorse Data I/O and bought one of those enhanced Willem 

>programmers on ebay.  Mine cost less than $70 when I bought it over 

>a year ago.  Works great on those larger eproms - I only use the 

>Willem when the Data I/O is incapable of programming the device.  I 

>have an old 100Mhz Pentium laptop connected to my data I/o and to 

>the willem and between the two programmers I am covered.

>

>Best Regards,

>

>Bill

>

>-----Original Message-----

>From: techtoolslist-bounces at flippers.com 

>[mailto:techtoolslist-bounces at flippers.com]On Behalf Of Matt Rossiter

>Sent: Saturday, October 29, 2005 7:43 PM

>To: 'Technical Tools Mail List'

>Subject: [Techtoolslist] The Age Old - "What Eprom Programmer should 

>I get"question

>I've been happy with my Data I/O 29b programmer for a long time.  I 

>especially like it because it does all the 82S proms that I need.

>Lately I've had a number of people asking me to program some of the 

>27C4000 and 27C010 series eproms.  I don't have the pinout cartridge 

>to do those and I'm not sure if I feel like hunting one down.

>Even though I fix games on the side for fun and a little side cash, 

>I'd like to get a nice eprom programmer (to program the newer, 

>bigger eproms) - but not pay $Big Bucks$ for one.

>

>I don't want to spend much more than $350 for one so I was thinking 

>of maybe the Needhams EMP-11 

><http://www.needhams.com/products-emp11.html>http://www.needhams.com/products-emp11.html 

>or maybe something that uses USB instead of parallel.

>

>What do you guys recommend?

>

>Thanks

>

>Matt

>

>

>

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