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EPROMs - Need good, low cost device to program

Discussion in 'Electronic Basics' started by Mark, May 29, 2005.

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  1. Mark

    Mark Guest

    I would like to program the 27c256 chip (29c256 would actually be

    1. Are there good, low cost devices to program this chip?

    2. Also, are there any good, low cost chip emulators for this 28-pin DIP?

    3. Are there any good internet sites for information?


  2. "Good" (depending on your definition) and "low cost" are very
    often exclusive. A device programmer is an investment, like any other
    quality tool, and should be treated as such.

    In short: Don't cheat yourself by buying a poorly-made piece of
    crap that'll fry more chips than it programs. Be willing and ready to
    shell out the $$ for a decent programmer.

    Now, with that said... Try searching Greed-bay with this link:

    It'll turn up a number of choices. The kicker is that you need to
    be careful what you buy, because many programmers are either difficult
    to support (in terms of hard-to-get control software) or hideously
    expensive to support (in terms of Data I/O units).

    Do your homework -- Pick one that looks interesting, and contact
    the unit's manufacturer. See what it'll cost to run the thing before you

    If you're looking for 'cheap,' and your computer has an available
    ISA slot and can run basic MS-DOS, you may want to consider Ebay item #
    7518303890. This is an older programmer, and it is limited in what it
    can do, but it should work well enough for your application and it's got
    a very low ($3.58) current bid.

    Happy hunting.

    Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute.
    (Known to some as Bruce Lane, ARS KC7GR,
    kyrrin (a/t) bluefeathertech[d=o=t]calm --
    "If Salvador Dali had owned a computer, would it have been equipped
    with surreal ports?"
  3. colin

    colin Guest

    I was looking on ebay just now for something that would program a variety of
    devices, eprom, flash, programable logic, micro controlers etc

    theres so many to choose from I get brain fade, what to go for, something
    cheap that program a limited range or an expensive one that does almost
    every thing, i supose if you go for cheap one if it doesnt do a device you
    need you can aford to buy another cheap one that does ... theres a very big
    diference in prices.

    Colin =^.^=
  4. John Fields

    John Fields Guest

    Ive got one of these that I bought somewhen between five and ten years
    ago. I run it on an old DOS box, I've never had a bit ;) of trouble
    with it and it's been worth every penny.
  5. Mark

    Mark Guest

    The ebay item you mentioned does not program 2732 since it doesn't include a
    needed adapter, so I wouldn't think it would program a 27256 chip, is this

    I have checked Ebay and searched on Google.
    I only want something compatible with Windows XP so I can use my most
    advanced computer.

    The reaons for my post is that I thought someone here would have experience
    in using such a device and have some tips on selecting a specific device
    capable of programming a 27c256 chip..

    I can't tell from the descriptions if they will likely fry the chips or
    difficult to program. Is there something I'm missing when I read the

    It seems that Batronix and Willems have 2 of the least expensive devices
    with software and can program the 27c256 chip..

    Which one of the above is better?
    Are there any other devices with acceptable software?

    Thanks again,



  6. is in the $300 range, but
    it will program anything you're likely to need in the way of memory, and
    some processors. I used the older EMP-20 for several years in a
    manufacturing environment. This may be more than you want to spend, but
    its worth taking a look at what it can do.
  7. Rich Webb

    Rich Webb Guest

    Another endorsement here for the EMP11. I picked one up a few years ago
    as a "personal" programmer for home and, occasionally, my desk at work
    to complement the EMP-20 and Data I/O programmers there.

    It did fail in use a year or so back. We popped it open and it appears
    that it was killed by one of the bad electrolytic caps that was making
    the rounds a few years ago. Although it was out of warranty, Needhams
    cleaned, repaired, tested, and returned it for free.

    The only caveat is that it's a parallel port device and that interface
    is slowly disappearing.

  8. That's why I keep a few old machines around, just in case. I think
    that there are USB to parallel adapters that are transparent enough to
    let you use most older programs if your computer doesn't have a printer
    port. The one on my bench at Microdyne had three printer ports and four
    serial ports because I had to do ISP on several families of chips plus
    the EMP-20 for socketed parts. All the images were stored on the
    engineering server so I created a HTML document to open the right file
    for each rev number.

    I think they need to start building programmers with an Ethernet
    interface. Use something like the Rabbit prototype board and build the
    programmer around it. I wonder if any of the software for DIY
    programmers has the source code available to convert it to Ethernet or
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