3 ms·
Build Your Own PDP-11.
- jacquesm 17y agoAmazing stuff. Still the guy was already very good at this: "While I was doing this I was (am) also working on a "real" cpu at a real company doing much the same thing, only on a larger and more grand scale. And my role is much smaller. But I've learned a lot from my day-gig and applied it to this project." What I wonder about is how much his experience of doing the whole thing on a smaller scale affected his day job, I'd hope that doing the whole thing by himself would give a completely different perspective on the work that he's doing for a living. One of these days I'm going to get an FPGA development kit and get my hands dirty. The temptation is very large. (I'm holding off because I feel that it might be just too big of a time sink). I like his debugging technique too, a clock divider to slow down the CPU and a bunch of led displays to show the PC. When working on one of my own projects I used a bunch of led's hooked up to the printer port, an out command in the main loop would indicate where the program was (or crashed...).
- CamperBob 17y agoThe truly '1337 hacker will simply hold an AM radio next to the board to diagnose a crash.