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Fixing an 88-PPG 1702A Programmer
I borrowed a MITS 88-PPG 1702A programmer from H. E. Robert in December. I did not get around to trying the programmer for some time and when I did it did not work.
Not only did I have a need to program/copy 1702A EPROMs, but I can't return a borrowed item broken! At the time I was not sure if it had arrived to me broken, or if I did something to it! I later found the issue, a solder joint, and there is no way *I* did it. I detailed the problem and process that I went through to fix it on the "Altair Computer Club" yahoo mailing list run by Steve Sheppard, a former MITS employee. I talk about files during the process. All those files are available here: http://www.stockly.com/images3/MITS_88-PPG_Debug/ Data sheets, logic analyzer captures, pictures, etc... |
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1702A programmer works! | Grant Stockly | Altair 8800 | 4 | 01-15-2009 07:58 PM |