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A lot of old AT cases had segmented displays to show the operating freq of the cpu at both the slower and turbo speeds. The display elements were mounted on a board that had many jumper pins. You had to set the jumpers according to the layout on the sheet (like in the pic) to get the appropriate numbers to appear. It was a real pain and it seemed that many case manufacturers used a different layout. I used to throw the charts under the counter mats on my bench after I used them. I guess after all these years, it's time to take all of them and put them in the filing cabinet as I doubt I'll see any more cases that I'll need to set up with them.
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Yeah some only had a few jumpers while others seemed to have a hundred and I don't remember comin' across any that were really the same. You'd get a few that would look to be the same module but the jumper setup would be totally different. ;)
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Yup,
And some very creative,and down right pain in the butt locations of these jumpers...:)Comment
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