2704 / 2708 EPROM reader / programmer kit :)

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asbesto's picture
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Joined: Aug 22 2012
Posts: 29

Hi there,

We was in need to read a 2708 EPROM from some of our historical pieces at our "Museo dell'Informatica Funzionante" Computer Museum; any normal EPROM reader can't read or program those EPROM, and the professional EPROM burner are very expensive.

So we created this reader using a PIC and a bit of software Smile

Here it is under GNU Free Software License! (Schematics, PCB layout, PIC firmware and Python software):

http://museo.freaknet.org/eprom-2708/

Happy EPROM reading! ^_^

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73 de IW9HGS - Gabriele "Asbesto" Zaverio"
Director of "Museo dell'Informatica Funzionante" Computer Museum
http://museum.freaknet.org - Palazzolo Acreide (SR) - Italy

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Joined: Oct 9 2011
Posts: 653
Re: 2704 / 2708 EPROM reader / programmer kit :)

Awesome I was just getting ready to look for one of these. I need to program a couple of 2708s for my Altair so this is perfect timing. Now I just have to learn Italian to read the directions Wink

Cheers,
Corey

asbesto's picture
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Joined: Aug 22 2012
Posts: 29
Re: 2704 / 2708 EPROM reader / programmer kit :)

There is the english version of that post, just select the language from the menu at right (hope it works!). Anyway the english version is here:

http://museo.freaknet.org/en/eprom-2708/

hope it works - we just added language support to our site so we're just hacking it Smile

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73 de IW9HGS - Gabriele "Asbesto" Zaverio"
Director of "Museo dell'Informatica Funzionante" Computer Museum
http://museum.freaknet.org - Palazzolo Acreide (SR) - Italy

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Joined: Oct 9 2011
Posts: 653
Re: 2704 / 2708 EPROM reader / programmer kit :)

I can read it now, thanks!!!!

so you haven't finished the "burning" a prom part only the reading. Please keep us in the loop when you do get that part working. That is the function I need to burn a monitor EPROM for my Altair.

Thanks,
Corey

speedyG's picture
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Joined: Nov 16 2011
Posts: 1386
Re: 2704 / 2708 EPROM reader / programmer kit :)

Hello together,

i didn´t realize that to be such a problem, because most of the "old-fashioned" eprom programmer cards out of the apple II series can do the task of programming and reading of 2716 and 2708 eproms....

i have one from the german company Springmann .... together with the software in Applesoft....
anyhow.... it seems i will add this to the tasks on my "todo-list" and make within the next 2 weeks or so a documentation of that card ( including the shematic circuitplan ) and upload the disk-image to asimov.....

The different kinds of eproms requested a eprom specific plug on a so called "selection socket".....
you can take a look to that card allready at:
http://www.harrowalsh.de/Elektronik/APPLEBOX/appleboxdownload.htm
its the second card in the list of special cards on that page....
the new page about the programmer ( not finished yet ! ) will be located at:
http://www.harrowalsh.de/Elektronik/APPLEBOX/appleboxSpringmannPage.htm
at the moment the page only contains some basic information... i will have to reengineer that card to add the
circuitplan .... but i have allready completed the parts on the card and made a link to the german manual ( which
i will of course translate to english too... ) and i must create a .DSK image of the software and i also must
create a PCB-film of the card... ) .... but you can get at least already now a impression of the card....

Quote:

EDITED UPDATE: The basic pictures have been made and i´m at least complete with the traces of the card.
Partialy the circuitplan ( in separated parts ) has been started - but yet not commented that far... just few
initial comments inserted.... feedback is welcome....

I´ll pickup this task as soon as i am finished with the 4th page on my series about adjusting the DISK II drives, which i intend to complete this week ( i just need some time to make the pictures off from the scope and comment them... ) that 4th page....
http://www.applefritter.com/content/disk-ii-drive-problems#comment-65247
and the page to be complated is at:
http://www.harrowalsh.de/Elektronik/APPLEBOX/appleboxdiskiipage4.htm
sincerely
speedyG

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eeun's picture
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Joined: Dec 19 2003
Posts: 1853
Re: 2704 / 2708 EPROM reader / programmer kit :)

Very nice. Just saw it posted on Hack-a-Day, too!

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speedyG's picture
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Joined: Nov 16 2011
Posts: 1386
Re: 2704 / 2708 EPROM reader / programmer kit :)

Hello asbesto,

after all, if you want to build the mimeo as announced, and you are still hunting for a epromprogrammer you should probably follow up the thread:
http://www.applefritter.com/content/interest-3-expansion-cards-fot-mimeoapple1#comment-65516
and there follow to the parts related to the ROMcard, because it will be designed for also beeing used as programmer.

sicerely speedyG

__________________

In early days I had a lot of money but no time - now I have no money but a lot of time....
the second part includes less friends but a lot more joy on life....