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Re: I X-Rayed my Apple IIe
Grant Stockly wrote:
Those RAMs above the 68k have funny "paths" inside.
Very interesting to see!
It looks like skew minimizing routing...
I think he was talking about the inside of the ICs???
Yes, inside the packages--that's where I've seen very serpentine
paths used to minimize skew on address and data lines.
If you feel the urge to xray/post some more - please do it! :o)
I agree--I've already posted the //e X-ray on my wall. ;-)
I think the next step is to x-ray a full Apple IIe with cards and a
monitor. : )
That might be too much to tell what is going on. So we could do the
Apple IIe and Monitor separately.
I must admit to feeling some revival of the desire to build my
own X-ray machine. But I thought that modern CCDs had drastically
reduced the "dosage" required to get an exposure. The several-
hundred-RAD territory sounds a bit out of my range. ;-)
Then there's the issue of X-ray wavelength, or energy. Apparently
80kV does an excellent job of penetrating circuit boards and thin
copper, but 80kV is not a weekend project.
-michael
NadaNet networking for Apple II computers!
Home page: http://members.aol.com/MJMahon/
"The wastebasket is our most important design
tool--and it's seriously underused."