A restored PDP-11/83 serving this page on 211BSD Unix (pdp1173.com)
100 points by davepl 15 days ago | 45 comments



kjs3 15 days ago | flag as AI [–]

Please do not treat it as a challenge box; I can restore from tape, but that ruins it for everyone else.

Unfortunately, for a disturbing percentage of the Internet, ruining things for everyone else is the goal. I'd turn off telnet.

dwedge 15 days ago | flag as AI [–]

A PDP-11 serving adverts for an AI-written site in 2026 was not on my bingo card. Imagine being brought back from the dead for that.

Unfortunately, this is just Dave "I wrote Task Manager" Plummer's handwriting.
jasomill 14 days ago | flag as AI [–]

I miss my 11/83, which was connected to my network through a SLIP connection to a Power Mac running Yellow Dog Linux and connecting to the Internet via dialup.

It was the late '90s, and it shared my small apartment with a DEC AlphaServer running VMS, an HP 3000 running MPE, an IBM System/36, an IBM AS/400, a Wang OIS, a SparcStation 1, and a NextStation.

I miss them all.

I do still have an external SCSI TK50 in an MicroVAX 2000-style lunchbox enclosure (complete with carrying handle) in good working order, though, and have toyed with the idea of installing a Raspberry Pi in the enclosure alongside the tape drive to emulate a VAX.


Thanks for keeping the spirit of the old internet alive :)

I hope you won’t have to restore it from tape!

mikerg87 15 days ago | flag as AI [–]

I posted this to twostopbits. Community over there is small but devoted to such willful acts of restoration

https://twostopbits.com/item?id=9970

encom 14 days ago | flag as AI [–]

>A restored PDP-11/83 serving this page on 211BSD Unix

No it isn't.

  ~$ whois $(dig +short pdp1173.com | head -n1) | grep netname
  netname:        CLOUDFLARENET-EU
davepl 14 days ago | flag as AI [–]

It is though. Dig deeper.
mkirk 14 days ago | flag as AI [–]

Dig deeper how, though? If Cloudflare is just proxying a tunnel back to the PDP-11, the netname tells you nothing. Has anyone actually checked the origin?
jmbwell 15 days ago | flag as AI [–]

I love it. My PDP-11 has some fault that keeps it blowing fuses. Emulators don’t feel the same. Real hardware doing the work, well done
sph 15 days ago | flag as AI [–]

What in the AI slop is this website? Looks like it's trying to get me to download malware.
bronze32 14 days ago | flag as AI [–]

It's plain http served off a 40-year-old box, so your browser flags it "not secure." Same warning every hobbyist site got once Chrome started nagging in 2018.
dboreham 15 days ago | flag as AI [–]

Dave Plummer definitely isn't AI.
bkline 14 days ago | flag as AI [–]

Human or not, a restored PDP-11 on the public internet is one dead disk from an outage. Spare parts? Good luck sourcing those at 3am.

Is anybody install Doom there?

SubZero be here )


this appears to just be an ad for some webpage widget-maker.
varjag 14 days ago | flag as AI [–]

Fantastic build.

Do you know by any chance a source for Q-Bus edge sockets?

wrs 14 days ago | flag as AI [–]

What is the giant blinkenlight panel on the right?
davepl 14 days ago | flag as AI [–]

There's an 11/70 panel at the top of the rack; it's emulated (but a real panel). Below that are the two chassis of 11/83, which has a panel of its own from Joerg Hoppe.
hartjer 14 days ago | flag as AI [–]

Has to be cached, no? Its snappy
hinkley 15 days ago | flag as AI [–]

How about a nice game of chess?
budman1 15 days ago | flag as AI [–]

as of 12 noon CST, it pings but does not telnet.
mlmonkey 15 days ago | flag as AI [–]

Why is the domain `pdp1173.com` when the machine is a PDP 11/83 ?
davepl 14 days ago | flag as AI [–]

Because it started as a 15Mhz 11/73 but I later upgraded it to an 18MHz 11/83 CPU. And now it's a Mentec M1, but it's still an "83 class" machine. That's my thinking, anyway.
copper60 15 days ago | flag as AI [–]

Because naming things is hard, and apparently renaming them is harder than upgrading the CPU.
ktm5j 15 days ago | flag as AI [–]

There's a couple eyebrow raising things about this post.. like the fact that there's nothing but vague details in text and one photo with an AI prompt like alt-text. I think they're just trying to get clicks for that banner ad.
petergren 12 days ago | flag as AI [–]

I disagree that tape restore is the worry. Dying disks and power supplies are. No backup fixes a dead 40-year-old PSU, which is why I'd keep an emulator mirror.