Found these inside a non-working 71B

[MikeSD]

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 on.my other 71B as well.