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Found these inside a non-working 71B
03-11-2018, 11:21 PM (This post was last modified: 03-11-2018 11:34 PM by MikeSD.)
Post: #37
RE: Found these inside a non-working 71B
ok, that mystery solved. When you said 2 modules i thought you meant two devices. got it now.

I wonder if my 32K RAM is actually two for 64, or one32K and a different ROM. odd one would be marked and the other not.

One last question befor calling it quits for tonight. You said the chip under Math looked different. i dont see any difference. There are 5 other chips besides the Math. All appear to be the same, except for the center bottom. it has a different solder jumper, than the other 4. its the same other 71B as well.

[Image: built-in.jpg]
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RE: Found these inside a non-working 71B - MikeSD - 03-11-2018 11:21 PM
What's U10? - Dave Frederickson - 03-15-2018, 03:43 PM

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