Ed Paradis eparadis

Pocket Chip Debian 10 Upgrade Guide

The purpose of this tutorial is to walk through the required steps to upgrade NXT chip (or pocketchip) from debian jessie to debian buster.

If you would like to start your Chip from scratch, follow the steps in the Preparation section.

Preparation (Optional)

A linux host machine, recommended Ubuntu 18.04. However I managed to do it with 20.10 with some tweak.

Mounting VirtualBox shared folders on Ubuntu Server 18.04 LTS (Bionic Beaver)

This guide will walk you through the steps on how to setup a VirtualBox shared folder inside your Ubuntu Server guest.

Prerequisites

This guide assumes that you are using the following setup:

Oracle VM VirtualBox version 6.0.10 with Extension Pack installed
Microsoft Windows 7 SP1 as the host OS
A fresh install of Ubuntu Server 18.04.2 LTS as the guest OS

You could still make this guide work with other setups (possibly with some modifications to the commands and whatnot).

SDCC - Interfacing with Z80 assembler code

The basics

When writing code to be compiled with SDCC targetting Z80, assembler code fragments can be inserted in the C functions by enclosing them between the __asm and __endasm; tags:

void DoNotDisturb()
{
  __asm

di

DX7

Note: One of the algorithms is incorrect due to a missing operator. Need to update the image. Will have to get on that soon.

These are the original 32 algorithms as used in Yamaha DX7.

The later Yamaha FS1R and Yamaha SY77 may have compatibility with these algorithms, but that's beyond the current scope. The FS1R contains 88 algorithms, while the SY77 contains 45 algorithms.

appinfo

A script for getting details of installed Mac apps. Like Get Info but faster and cooler.

Save the script below as appinfo somewhere in your path. Make it executable with chmod a+x appinfo. Then just run appinfo APPNAME to get info on any installed app.

	#!/bin/bash

	if [[ $# -ne 1 ]]; then
	echo "Usage: ./meeting_countdown.sh NUM_MINS"
	exit 1
	fi

	MINS=$1
	OUTFILE=~/src/obs/timer_out.txt
	MESSAGE="time remaining in this meeting: "

	// @MAP_IO port_out_00[0] 06
	// @MAP_IO port_out_00[1] 07
	// @MAP_IO port_out_00[2] 08
	// @MAP_IO port_out_00[3] 09
	// @MAP_IO port_out_00[4] 10
	// @MAP_IO port_out_00[5] 11
	// @MAP_IO port_out_00[6] 12
	// @MAP_IO port_out_00[7] 14

	// @MAP_IO reset 18

	/*
	* PunyForth
	*
	* Copyright 2020(c) mtvee
	* All rights reserved.
	*
	* MIT License
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy of this
	* software and associated documentation files (the "Software"), to deal in the Software

	#!/bin/bash
	# Raspberry Pi stress CPU temperature measurement script.
	#
	# Download this script (e.g. with wget) and give it execute permissions (chmod +x).
	# Then run it with ./pi-cpu-stress.sh
	#
	# NOTE: In recent years, I've switched to using s-tui. See:
	# https://github.com/amanusk/s-tui?tab=readme-ov-file#options

	# Variables.

	import collections
	import math
	import os
	import cv2
	import numpy as np
	import time

	MAX_LINES = 4000
	N_PINS = 36*8
	MIN_LOOP = 20 # To avoid getting stuck in a loop