> Oh that blinkenlights panel is excellent! All emulators should have > one! :-)
Yeah, isn't that fun? Once I got it running, I just sat and watched it for about fifteen minutes while it ran our disk exercising program. And then I noticed a bug. It apparently wasn't causing a problem but the address line 00 was lighting up each time it did a DMA. That didn't seem right. I looked through the Verilog and figured out what was going on. It probably wouldn't have caused a problem, maybe, but I got to fix it anyway. See? 'Dem blinkenlights are useful! > I'm not really into Qbus much but would probably buy a > production example anyway. I'd certainly fork out for several Unibus > devices if you make them! Our plan was to do a Unibus version of the same thing as a follow-on. It ought to be reasonably straightforward. > One tip from someone with same issue in a parallel endeavor (IBM > System/360 panel): they look much better and more authentic with 'warm > white' LEDs. These are the ones I'm using: > https://octopart.com/l5-n55n-fuv-sloanled-29855005 Yeah. You can see in this picture that the LEDs I picked have this yellow lens. I was hoping that would warm up the output but obviously it didn't. I looked through the list of 1206 and 0805 LEDs on DigiKey and didn't find any that were obviously what I wanted. I'll take suggestions from anyone. Or, I suppose, I could re-spin the board for through-hole LEDs. I've actually come to prefer surface-mount though and I'm hoping that one of these days I'll have my own pick and place machine (or I'll talk our soon to exist MakerSpace into getting one). http://pdp10.froghouse.org/qsic/indp.jpg