Comments for page: 1702A EPROM Programmer

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Posted by Paul Williams. UK October 27, 2012 - 12:21 pm
Thanks Stephen, that was fun. I constructed the Popular Electronics version in 1978/9 for a Z80 homebrew - it worked and I still have it. As you say, hand toggling each byte was arduous, but one1702A held enough code for a monitor, and another held the VDU routines. Those were the days...

Posted by Stu B June 06, 2012 - 10:34 am
I was lucky enough in my research on early eProms to talk to Dov and get the information Martin needed to make the changes to his programmer. Apart from the non As, I also sent a NS 5203 eprom but still need to find him a 5202 to test.
Personally I have been sourcing enough vintage components over the past year for 10 replica 1701/1702 manual programming boards based on Intel 1971/72 documentation

Posted by Steve L. June 06, 2012 - 07:10 am
Thanks, Stu! That's right; Martin's programmer does do the non-A version. Those are apparently rare and I haven't found information on the differences. I did see a posting that someone supplied the non-A version to Martin for testing. FWIW, they said that a few bits were stuck high but after many programming passes, those bits were cleared.

Posted by Stu B June 06, 2012 - 04:30 am
Excellent solution for your needs.. great job.
I noticed Martin didn't mention that his latest version can also deal with the non A version Intel eProms 1701/1702

Posted by Steve L. May 11, 2012 - 10:09 am
Hi Martin,
It's really nice of you to say that! So, have you thought any more about offering more kits? You had mentioned in your posts that PCB cost minimums are a stumbling block. Could something like Batchpcb help with that?

Posted by Martin May 11, 2012 - 09:47 am
Thanks for the kind words about my programmer, Steve. I was about half finished with my design when I saw your first post. I like your design, and had considered this approach as well. But a PIC costs only $3.00, and I am better at assembly language than DOS programming :-)

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