Recent content by davepl1968

Greetings! I have a full KIM-1 stack from MTU, including about 6 boards. One that I'm currently missing (DOA and out for repair, hopefully) is the K-1013 floppy disc controller. If anyone has a K-1013 that they'll never use again, or has a line on one, please let me know! Thanks! Dave Plummer

Old thread, but I thought I'd show off my KIM-1 w/ MTU-K-1008 graphics board running this plot... slightly sped up :-)

Sigh. Someone monkeyed with a low bit toggle switch, and my bad for not visually confirming! Operator error, disregard!

Greetings! I have an Altair 8800 that was working perfectly; I R&R'd a board and now it won't boot into BASIC from ROM. I've stripped the machine down to just the 88-RBM and the CPU cards installed at this point: Here's what I know: 1) The first byte of the ROM is F3, or 363 octal. 2) With...

I managed to get it running - I had to remove my RQX3 controller as the QBONE takes its place, and they don't co-exist nicely. Photo of my PDP-11/73 and VT220a below! What are the odds I can get basic networking operational through the QBONE? If anyone has any pointers on how to get 211BSD to...

Greetings! I've installed a QBONE into my PDP-11/73, and can connect to it. I can boot RT11 using the QBONE script. Starting any other system, from BSD211 to VMS, I haven't figured out yet. My PDP winds up at this prompt: When I run the 211BSD script, it says this: I'm not sure what it's...

Yes, I'm in Sammamish! It's a quad M8190. 9278A backplane. Only drive is a cartridge tape drive, no floppy. I have a good MFM emulator board to take the place of a physical drive if needed, but still not sure how to get something ONTO that drive!

It's an M7555 in the 11/23. The 11/73 seems to have an M8639.

I received the PDP-11/73 that a viewer kindly donated, got it spiffed up with Simple Green and compressed air, and proceeded to power it up. Dead, not a whimper. So having just seen Usagi Electric’s experience with a very similar looking MicroVAX, I checked the RIFA caps in the power supply and...

I received the PDP-11/73 that a viewer kindly donated, got it spiffed up with Simple Green and compressed air, and proceeded to power it up. Dead, not a whimper. So having just seen Usagi Electric’s experience with a very similar looking MicroVAX, I checked the RIFA caps in the power supply and...

I have an MFM drive emulator, and was wondering if it's possible or practical to perhaps load some of the boot disk images from the pidp-11 onto the SD card and boot them on the PDP-11/23 Has anyone attempted this before? Or failing that, are there images of BSD or System V that I could...

It looks like a 9278 backplane has the connectors I need, whereas the 9275 that I have does not. I've ordered a 9278 in the hopes it will solve my dilemma!

I've assembled the guts of an 11/23 in a backplane and connected it to a front panel, and have it coming up to the boot prompt. I have an HD with an image of RT/11 on it (or maybe RTS), but the M7555 has a 50-pin cable and the drive is the standard 2-cable ST-506. I think there's a plane in...

I found a BA11 so I can likely assemble most of a PDP-11/23 but would still love an 11/73 MicroPDP... or any working system, the more blinkenlights the better!

Greetings! The BA23 chassis I just purchased was lost in shipping :-(. I have the rest of the internals, and can make a switch panel, but was really hoping to have an original setup. If anyone is tiring of their complete PDP-11/23 or MicroPDP, or any complete PDP system for that matter, please...