Posted by minime

August 30, 2014 - 01:02 pm

This is by far the best writer description I could find so far... unfortunately for me I am searching for a reader only, to keep things simple, but most on the net is either incomprehensible or includes a writer. Would it be hard to extract from the schematics only the writer part?

Posted by Steve L.

August 28, 2013 - 06:32 am

Hi Mike, I'm not familiar with the M5203Q part and could not find a datasheet on it. Sometimes, board manufacturers use "house numbers" on parts, instead of the standard commercial ones. It's possible that that is what this number is. I'm sorry that I cannot help further with your question.

Posted by Mike

August 27, 2013 - 09:35 pm

I need some help programming a few M5203Q eproms. Im not electronically inclined. Will this copy / program this eprom? Thanks

Posted by Steve L.

October 27, 2012 - 12:47 pm

Hi Paul, I appreciate the kind words. It's neat that you built the PE programmer and Z80 computer. I had a somewhat similar experience around 1976, building an 8080-based computer. I was lucky though, that the company where I worked had an Intel development system (in another building). Used that to burn the 1702A-based debugger for my 8080. Used every byte!

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