I got a couple of 5150s the other day and one had an "IBM Personal Computer Network Adapter" from 1984 fitted. Due to the stupid general name of that card, I wasn't able to find much info on it. Only some press-releases indicating that it's not ethernet or something, but a proprietary networking solution by IBM. So I guess that card is completely useless these days? Does it hold any value? I'm currently unsure what to do with this thing...
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