Recent content by SpaceHobo

Have you tried testing the cables in capacitance mode? Often if there's a wear-induced break in a cable, it can form a crude capacitor. You mostly notice this in audio cables when it sounds like a pass filter has suddenly been added to your chain.

Yeah, inetd is also nice in that you can just write a tiny program that speaks its protocol via stdio, and you sort of magically get a forking TCP server for free!

Running the httpd as root is a hack, for the most part. The only thing it should need root for is in binding to port 80 (if that's what you're doing, and if 2.11BSD's TCP stack requires this for low-numbered ports which it may not). My guess is that your real problem was that you hadn't made...

Astable circuits like this tend to be the bread&butter of radio folks, so it does sound like someone in the EE department might be quicker on the jump at pinpointing the root cause.

See, I went back to school and now I'm trying to work out if I can spend any of it working on the UMD 12...

There was a story from the LINC days of someone having to do a demo the next morning and the thing was behaving extremely oddly. So they phoned up the LINC team and described the symptoms. There was much head-scratching and finally the answer came back "The only place that could explain all...

I don't know about an emacs "clone", but the actual "editing macros" for TECO should work on the 8 version, somewhat.

In the following video (cued up to the relevant portion), there is mention of a PDP-8 clone of vi, enabled by the PiDP-8. Can anyone help me find out where this is, and if there is source anywhere? I'd love to see this!

The goal of TTO is not to compete with FPGAs for retro CPU projects: it's to give people an affordable way to get hands-on experience with actual ASIC development processes right down to the physical silicon. You only get the one chip (which has that run's projects in an array you can select...

So it was a compounding of errors that led to the symptom, but you can recreate the mistake quite simply: MYVAR, 7242 / My variable has important data in it / ...lots of code later... AND, MYVAR / AND my important data with AC This redefines AND to be the address of MYVAR...

Ah, you hit the bug right on the head! It was a stray comma rather than =, later on in the code, but i absolutely managed to accidentally try and redefine AND as a symbol!

I'm tinkering with a project right now, and tracing it through in SIMH. My code walks some SIXBIT text, and I'm trying to do some sub-addressing of the "bytes" in each word. As a result, I do a lot of masking off of bits. No problem, says I. This is the very first instruction for the PDP-8...

One thing you could do also is to share your minirc.dfl files (there's one under /etc/ and a dotfile version in ~) for folks to pick over. There may be a setting that can go in there to prime the connection settings better. Chances are you're getting 1990s modem settings when your use case is...

Oof! Minicom kind of inherits some of this behaviour from the terminal it's started within, so you may be able to poke it with some stty commands, if there aren't options to send specific newline characters. Another thing you can do is manually tap in ^M or ^J as you need.