Edit: I'll bet it's no longer possible to do this on modern CPUs; either the memory busses are inaccessible (SoC) or so highly optimised (DDR4) that it's infeasible to probe them without disrupting the transmission line.
[1] Ciarcia, S. "A Penny Pinching Address State Analyzer". BYTE 3(2), pp. 6--12. February, 1978.
Here's an article about it, with photos [1]. I remember reading it in BYTE, years ago.
https://archive.org/stream/byte-magazine-1978-02/1978_02_BYT...
Edit: I'll bet it's no longer possible to do this on modern CPUs; either the memory busses are inaccessible (SoC) or so highly optimised (DDR4) that it's infeasible to probe them without disrupting the transmission line.
[1] Ciarcia, S. "A Penny Pinching Address State Analyzer". BYTE 3(2), pp. 6--12. February, 1978.