Plane of core memory

I am the enviable owners of a plane of memory (procured a few years back at VCF-East, when there were a bunch of 32K? boards int he consignment pile. (Sorry, not currently interested in selling :-) But, I am thankful for the links, as I have wanted to interface this with a CPU or PC of some kind. A few questions, though: * Is there a way to "read" the core non destructively using any kind of passive method (I know, it would be tedious, no doubt, but I just feel like I should "backup" the core before I go messing with it)? * Along with the above, might there be a way to extend the passive read to be a worthy "exhibit" I could take to shows? Core memory is impressive just to look at, but reading it out using the PC and displaying the contents is so easy to fake that I think people will assume the core memory is not really being used.? Some way of showing the actual magnetic changes in a small matrix (the large plane I have is probably not a good candidate unless there is a way to show such minute cores fields) would I think make the exhibit far more interesting, especially if I arranged the grid in a square and created a really slow version of something like "Tetris" on the plane. Ideas appreciated. Jim