KY11 - ever debug one?

Tony Duell wrote: The state appears to be "wait". Intr (pin 18) is in fact low. The "rdy" signal (ping 17) is high. I discovered that if I ground the "rdy" signal (ping 17), then I see the state output change. I suspect the cpu is halting for some reason. I did try and capture the state of the Intr pin from power up and I'm not sure it ever went up (but I was in a hurry and not sure I actually had the scope in the right mode to capture it - edge detect, rising edge, 3v, but I'm not sure the time scale was correct). The 8008 has a bit of setup which is done and the logic counts 16 clocks before asserting Intr, sync'd with the clock, which is reset when it hits a certain cpu state. I'm not convinced this is working. I think the next step is to connect a logic analyzer to the data bus, sync and state pins. The nice thing is there are only 16 signals... If I can watch it fetch I can figure out why it is halting. The maint manual talks about using a delayed sweep to see how far it gets but I think a logic analyzer will get betters results faster. -brad