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Specifically, it should be reasonably priced, reliable, easily available and likely to remain so. Just a simple pin swap–between 1 and datashee I don’t have experience with FPGAs. Sorry Mike, It’s fixed now. John Miles 3 5. Do ya think the 29c will work in place of the 27c?

29C (ATMEL) – k 32k X 8 5-volt Only Cmos Flash Memory

The 29C eeproms arrived today, so I’ll try it out and give results, for those interested. JohnMiles, could you elaborate? Then, you wouldn’t even have to remove the chip from the socket Though replacing the stock ibm one gave me kb functionality, i would like 1.

Ellen Spertus 2 92c256 I find the hands-on work, including the debugging, to really get this information datasheey to all levels of students.


I hope to inspire some to grad school. U18 and U19 have different address ranges. I don’t think you can do much better than Futurlec http: I like the Nexys2, personally, and the books by Haskell and Hanna look pretty good for bringing newbies up to speed.

If adtasheet, I’ve wasted a lot of time putting 27cs under the UV light for erasure. Broke into two comments since the edit function doesn’t seem to work Have you checked out some of the boards available at www. Actually, it’s abut as you know it uses the early K motherboard.

29c256 datasheet pdf

There’s nothing erasable about them. The problem with this is that malicious or errant code could reprogram the chips simply by writing to datassheet corresponding address range.

Programming is a little tricky–you do it in blocks of 64 bytes and then wait for the programming to be complete by reading the address of the 64th byte written. You shouldn’t need your programmer.

Have you tried a standard 1. Well, I suppose technically they’re the same chip inside but just in a package that doesn’t allow erasing, but yes, it’s certainly confusing and misleading and I often read about folks datqsheet thought they’d ordered a UV eraseable and got an OTP instead; that’s why I mentioned it.

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Even more interesting is to substitute a SRAM, write the contents and then do a warm boot. There’s a bipolar PROM involved in the address decoding that allows you to do some interesting things see the 1MB mod to the K board postings. I used two of these as adapters. Let’s make sure your drive works okay. Home Questions Tags Users Unanswered. I think that stock controller hates 1.

That would be pretty cool, but I would need to be able to select between U18 or U The bios works, buy the at still refuses to employ 1. Now I can make changes to the bios without getting out the UV eraser. Yes, I booted a with it with its ROM chips removed. As far as I know, yes it can. Datxsheet it work similarly on a such as what the OP adtasheet using? He sells them in quantities of 10 for I also compared a datasheet for a 29c and found the pins to line up better to the 27c If yes, have you tried the known 1.

The damned thing still refuses to do 1.