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I have exactly the same problem, but my board it's crystal clear!

Still looking! :)

Sure you can find it here. Scroll down a bit and you see dos version of pc-4600 https://winworldpc.com/product/ms-dos/3x

Still searching!

Hello! Any luck you have a pair or just one pcs of Stackpole switch that I am missing please? Look here: https://forum.vcfed.org/index.php?threads/wanted-key-switch-for-netronics-research-video-keyboard.1240784/ Thank you!

Still searching! 🙏🏻

Happy New Year to all !!! Still looking, thank you!

I am still in search

Still looking :)

Hello all! :) Here is what we need to connect eprom programmer with PC. As i told you earlier, i am waiting the parts to come! I upload it as pdf because is easiest to keep the text format.

Here is the part that talk about that: ------------------------------------------------------------------------------------------------------------ 8.2 COMMUNICATION FORMAT The developer uses two formats. The "memory dump" described below and the intel hex. To change the format, after...

I will try in the next days to translate the manual from Greek to English. I don’t know if there is a tool on the net that do that automatically. From little I read it is a great manual with very interesting infos. He has the way you have to do to make a communication rs-232 cable. About...

Just now, next to me in the passenger seat! ;) I cross my fingers for the software next time! We meet with Mr Rizos co founder of RELEC company in person to give me this manual. No time to talk but I have to say that is a very kind person!

Well, I think I have some good, promising news! Yesterday I send one more email to RELEC company and send them a link from this thread to understand the work we do here to get any informations. And just get an answer! Here it is: (translated from Greek) Happy days! :)

Yes that is the only solution. I will do it when I return cause I am away :)

Exactly! :)

Hello all. Bad news. There is no software available. They don’t have it any more. Maybe in the future they will find the manual. But to be honest, I don’t hear them at the phone very positive to help…

Hello all. i am searching 1 or 2 key switches for Netronics Research Video Keyboard. Black Key caps are welcome too. Photos are for internet: thank you.

If i remember well the U24 it's a Mostek MK34073N

I suppose you have already buy your tester but the following tester may still help you in some ways. For 7400,74LS,74HC,74C and 4000 Series give a try to Tauntek IC tester. I have it about two years and i find it very useful. It is terminal based with many output infos for tested ic. And that...