[GreenKeys] UGC-136BX EPROMS

[John Hargett]

Dave,

     I  am glad to hear you did get it operational.  I have been 
wondering if you had been able to get it working or not.  I believe you 
were the only one that had a bum one out of the box.


      Eric,

     Just to let you know I have dropped off 2 machines to SAMSAT.  They 
were very much appreciative of the donation.  I got to check out the 
STEM side of their facility, but the interesting side is still tied up 
between the estate and repairs to the A/C system.  They hope to have it 
all worked out by October, so looking forward to getting back down there.


     To all,

  Just a heads up. I still have several UGC-136 BX available ( 2 of 
which I have never received shipping payment or info from the purchaser, 
will probably finally refund his money) Once I get everything 
straightened out on that , if there is interest in the remaining 
machines, I will let them go at the same price and condition for 
shipping to the first  replies.  I did have issues getting some of the 
emails in the first go of these, so please be patient.  I will send out 
another email once I get the refund settled and list machine qty and if 
they are NOS or DEPOT refurbs, and will assign them to those that reply 
first to that email.

     A big thanks to Nick for all the reverse engineering and digging 
into the EPROMS, will definitely be keeping that info around.

John Hargett
   KG5YLG
   

On 9/21/2026 9:10 PM, Dave Beck via GreenKeys wrote:
> As part of the group buy, I was lucky to get one of the famed UGC-136 
> teleprinters. It's quite a machine, and my thanks to all involved in 
> that purchase. Unfortunately, it didn't work when I received it. I 
> tried reseating the boards and socketed chips, but no go that is until 
> recently.
>
> It has been sitting for 2 years, until recently, when I ran into Eric 
> Moore and his working unit at the Chicago computer show last weekend. 
> His teleprinter worked beautifully, and he was very receptive to 
> helping me get mine going. (What a great guy!) He was willing to swap 
> boards, etc, but since I'm 3 hours away in Wisconsin, we settled on 
> comparing EPROM images from my machine with his. So, I purchased an 
> EPROM programmer, removed all 10 EPROMS and read them. To my surprise, 
> when I re-assembled the machine, it WORKED! Now I've got a working 
> machine. I loaded up a new 3D printed ribbon (Again thanks to you and 
> the Greenkeys  group) and I'm all set!
>
> I want to thank Eric for his offer to help me, and Nick for posting 
> the EPROM images to his website.
>
> My question is, these EPROMs were programmed in about 1995, or 31 
> years ago. What is the possibility that they will lose their program 
> after this much time? Anyone have experience with this? From what I 
> can see, there is no harm reprogramming them with the same data. It 
> seems some pinball guys do this for their old machines.
>
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