[thedracle]

So, it was a long time ago, and I did use a JTAG emulator/debugger called the "Partner JET:" https://www.kmckk.co.jp/eng/gigatrace_index.html

It was extremely expensive, and commercial, I'm honestly surprised I could even find a website for it.

It was extremely cool to basically scroll through memory, our hardware had an on-board FPGA that gathered waveforms from a photomultiplier tube attached to a scintillator, and when I was writing the driver for it, I could watch the memory in real-time with the debugger changing.

Setting initial values of memory to something like 0xDEADBEEF, and using this thing, was an incredibly powerful debugging strategy, especially when dealing with hardware.