TRS-80 Model I

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Revision as of 16:25, 30 May 2019 by Jeffa (talk | contribs) (add expansion interface unit)
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TRS-80 Model I found on eBay not working correctly. After some research got it working.

TRS-80 Model I.jpg TRS-80 Model I and Accessories.jpg

Here is another Model I I picked up along the way. This one has the expansion interface. Note 48k displayed on screen.

TRS-80 Model 1 With Expansion Interface.jpg


I acquired from eBay. I replaced one of the video RAM chips resulting in a nice clean boot. This Model I came with the carry cases a monitor cover and cassette drive and cables.

I found this site and a document found there very helpful. After reading it I was able to identify the specific chip that was in error. I found a replacement on eBay for a couple bucks. Working again.


Lots of TRS-80 information on this site by Ira Goldklang

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