Joan Touzet wohali

Using C-Kermit with SimH to transfer files from a simulated PDP-11

This is a short guide on copying files to/from a simulated PDP-11 using C-Kermit. It's slow, but extremely robust.

Configuring SimH

Here's a minimal machine config for Kermit. It's possible to run in less memory but I didn't spend the time to work it out.

The most important parts of this config are the dli/dlo lines, which enable a second serial line for file transfer, and the cpu line setting 256KB of memory.

For CUDA 12, see Installing CUDA 12.1.1 + PyTorch nightly + Python 3.10 on Ubuntu 22.10 for how to install Nvidia driver 530, gcc 12 and CUDA 12.1.1 libraries.
If you want CUDA 11.8, then you can use latest Nvidia driver from Production branch, 525, with gcc 11.

Activate your conda environment, if you haven't done so already.

CUDA 11:
Make sure gcc 11 is the default gcc for your OS, or select gcc 11 explicitly.
CUDA 12:
Make sure gcc 12 is the default gcc for your OS, or select gcc 12 explicitly.
Check CUDA_DIR below points to the CUDA installation you wish to use.

CouchDB downloads, Apr 1 2020 - Apr 1 2021

platform	# of DLs (approx)	# of DLs in 2019 (approx)	comments
Docker	70.5m + 19m = 89.5m	60.4m + 6.7m = 67.1m	See notes
Windows	72k	100k	75% 3.x, 25% 2.x. Extrapolated from 253d of data
deb (Debian / Ubuntu)	65k	65k	76% are 3.x, 24% are 2.x
rpm (CentOS / RedHat)	63k	40k	69% are 2.x, 31% are 3.x
source `.tar.gz`	11.6k	38k	extrapolated from 10 days of data; primarily 3.1.1
Mac	18k	25k	67% 3.x, 32% 2.x. Extrapolated from 253d of data

Install and add a filter to mute any highlights to the word "rune" in #r/leagueoflegends on quakenet.

Autoset is used to make it persistent.

/script install unhighlight.py
/script install buffer_autoset.py
/autosetbuffer add irc.quakenet.#r/leagueoflegends localvar_set_unhighlight_regex rune

Basics

Comments on tone and style:

Never apologize in a design brief
keep it succinct
Do not talk about design features that do not have a direct correlation with a problem

PRE DEFINE

Definition: A design report documents the solution to a unique problem.

I assume you have an RX50 dual-floppy on your machine, and that you're trying to get the data off of e.g. an ST506 MFM HDD that's in the machine.

Get a PC or laptop setup with serial to the box. You want to connect to the Console port (the top left one), set the rotary switch to 9600 bps (setting 14) as 19200 is too unstable. You'll also need a null modem crossover to swap RX/TX and RTS/CTS. I recommend using Kermit on your machine to speak to the PDP, as you'll need it for file copies anyway. You can create the following script as e.g. pdp.ck and execute $ kermit pdp.ck to automatially connect to the machine with the correct parameters:
```
 set line /dev/ttyR0             ; replace with the correct device for you
                                 ; this is port 0 on a RocketCom 8-port serial card
 set speed 9600                  ; rotary switch setting 14 on the micro PDP-11
 set parity even                 ;
 set stop-bits 1                 ;
```

set session-log binar

This configuration is not maintained anymore. You should think twice before using it, Breaking change and security issue will likely eventually happens as any abandonned project.

	// I'm tired of extensions that automatically:
	// - show welcome pages / walkthroughs
	// - show release notes
	// - send telemetry
	// - recommend things
	//
	// This disables all of that stuff.
	// If you have more config, leave a comment so I can add it!!

	{

	#!/usr/bin/python
	# vim: set ts=4 sw=4 expandtab syntax=python:
	"""

	FTDI device permission fixer

	Can be called from a udev rule to ensure connected FTDI devices have
	world-writable permissions for use by user applications

	J. Hipps <[email protected]>

	#!/bin/bash
	exec {times}> times {typescript}> typescript < "${1-/dev/stdin}"
	while read -r; do [[ $REPLY = ' "stdout": [' ]] && break; done # skip to this line
	LANG=C
	printf "Script started on %(%c)T\n" -1 >&"$typescript" # dummy
	while read -r open; [[ $open = '[' ]]; do
	read -r elapsed; read -r string; read -r close
	eval printf %b%n "$string" characters >&"$typescript" # put count in $characters
	printf "%s %s\n" "${elapsed%,}" "$characters" >&"$times"
	done