EPROM Programming

Krepticor · Post by **Krepticor** » Fri Nov 10, 2006 7:12 pm

ok I recently stumbled overthis (from hack-a-day no less)

http://www.miranda.org/~jkominek/hardware/eeprom/

and I really want to start programming eproms... can someone help me with the scematic since he said he used a different pin labeling system...

Also, could someone help me with the C code he uses, I am not much on code and I do not have a way to read C anyway...

so I need help with...

1) reading the scematic and what chips are needed (couldn't get a product number...)
2) deciphering the C code and programming the eprom
3) a eprom that is extremely cheap and can be bought in bulk and used with this schematic
4) a "For Dummies" approach would be nice

Post by **gannon** » Fri Nov 10, 2006 7:41 pm

1) the schematic is clearly labelled by pin # and signal. All chips are 74x series as stated on the page
2) the C code is just code, you can read it in a text editor if you want. It needs to be compiled to be used
3) He labels it to work with the 28x256 eeprom, but it might work with larger 28 pin eeproms
4) Maybe save up the money for a cheap programmer

You can get one for $20 that only programs serial programmable eeproms, or a $50 that works with most things.

atari2600a · Post by **atari2600a** » Fri Nov 10, 2006 7:58 pm

BTW, EPROMS aren't EEPROMS.

Krepticor · Post by **Krepticor** » Fri Nov 10, 2006 8:30 pm

ok Atari DUH!

Eprom is a designation for erasable programmable read only memory

there are eeproms which are reprogrammed electrically and the usual uv eprom which are erased by UVradiation bouncing off a silicon disrupting magnetic programming of the ROM

thanks gannon All I ever saw on the lines of programmers was the blasted willheim programmer that is like 200+ bucks

I wanted a cheap alternative for some cart reprogramming could you link to those that are really good (and have a list of eproms they can use)

Post by **gannon** » Fri Nov 10, 2006 9:04 pm

I'd say this is a good/cheap one: http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0047130552
I use a serial programmer, but it has limited compatibility.

Krepticor · Post by **Krepticor** » Fri Nov 10, 2006 9:10 pm

ok good I just really want an EPROM writer that works with EPROMS that can be programmed to make NES Flash CArts and the like...

also mabye a reprogramming of my XBOX's BIOS or something in the like.

I just need to know what EPROMs you recommend and all

does this one work with just the USB or is both the SErial needed and the USB needed just for power?

what about this one?
http://cgi.ebay.com/PIC-16F84-24CXX-Sim ... dZViewItem

sammy · Post by **sammy** » Sat Nov 11, 2006 6:46 pm

Why would you want to use an eprom? Eeprom's are much easier to work with and can be stuck in the board permanently.

Post by **CronoTriggerfan** » Sat Nov 11, 2006 7:50 pm

atari2600a wrote:BTW, EPROMS aren't EEPROMS.

Seriously atari, have you EVER posted ANYTHING useful EVER?

And I read a good book on the subject a while back. Lemme see if I can dig up the title, it was by Wiley Publishing (same company that published Ben's book, and my last name!)

CTFan

Krepticor · Post by **Krepticor** » Sat Nov 11, 2006 9:44 pm

yea a book would be nice (so I can stop bothering the nice people on the forums!, but hey read my sig...says it all)

Uzumaki · Post by **Uzumaki** » Mon Nov 13, 2006 6:55 am

I've had great luck with Willem EPROMer. Very cheap and works well with EPROM and EEPROMs and many more devices.

Krepticor · Post by **Krepticor** » Mon Nov 13, 2006 9:35 pm

what program did you use to program with?

Indigno · Post by **Indigno** » Tue Nov 14, 2006 9:24 pm

BTW mice aren't keyboards.

There was a similar article on Hackaday.com a while back, but I have been unable to find it. If you felt like looking a little you could probably find it.