lelegard

Installing Debian for LoongArch64 on Qemu

This note is a summary of my experience of installing Debian for LoongArch64 on Qemu on a macOS host. This is just a personal experience. There may be other ways.

LoongArch is a recent CPU ISA (Instruction Set Architecture) from 2021. LoongArch was designed by the Chinese company Loongson Technology. It is considered as a common heir of MIPS and RISC-V. LoongArch64 is the 64-bit version of LoongArch. Two 32-bit versions also exist.

Note: Loongson Technology used to design MIPS chips. LoongArch is not a MIPS architecture, it is a new CPU architecture which was designed by Loongson Technology, based on their prior experience with the MIPS architecture.

Background information:

• https://loongson.github.io/LoongArch-Documentation/README-EN.html

lelegard

Monitoring CPU temperature on macOS

This note describes various ways to monitor the CPU and GPU temperatures on macOS.

These methods were tested on Apple Silicon Macs with macOS 26.5. They may not work on older Intel Macs or other versions of macOS.

macmon

The open source utility macmon displays various indicators on the system, including the CPU and GPU temperatures,

lelegard

Setting Qt Creator language on macOS with Homebrew

On macOS, the C++ IDE "Qt Creator" can be installed using Homebrew. This is simpler than fetching and installing the complete Qt for Open Source Use environment. The updates are also managed with the rest of Homebrew.

The installation command is:

brew install qt-creator

lelegard

<#
 .SYNOPSIS

  Disable Windows power throttling on VirtualBox executables.

  Copyright (c) 2024, Thierry Lelegard
  BSD-2-Clause license, see https://opensource.org/license/BSD-2-Clause

  The problem: On some recent Intel chips such as the Alder Lake family,
  there are two types of cores: P-cores and E-cores. P-cores are designed

lelegard

Installing Ubuntu for RISC-V on Qemu

This note is a summary of my experience of installing Ubuntu for RISC-V on Qemu on a macOS host. This is just a personal experience. There may be other ways.

For simplicity, all files will be copied in one single dedicated directory and all commands will be run from that current directory.

Initial reference: https://wiki.ubuntu.com/RISC-V/QEMU

Prerequisites

lelegard

Installing Ubuntu for IBM s390x on Qemu

This note is a summary of my experience of installing Ubuntu for IBM s390x on Qemu on a macOS host. This is just a personal experience. There may be other ways.

If you wonder why I had the silly idea of installing an IBM s390x virtual machine on macOS, 1) because it is possible, 2) because it is a big endian system which can be useful to test the portability of some applications.

For simplicity, all files will be copied in one single dedicated directory and all commands will be run from that current directory.

Initial reference: https://community.ibm.com/community/user/ibmz-and-linuxone/blogs/timothy-sipples1/2020/04/28/run-ubuntu-z-linuxone

lelegard

Apple architectures arm64 and arm64e on macOS

This document has been moved here, inside the arm-cpusysregs project.

lelegard

#!/usr/bin/env bash
# Reorder pages in a PDF file to print a booklet.
# Then, print the output PDF in duplex mode, short-edge binding, 2 pages per sheet.

SCRIPT=$(basename "$BASH_SOURCE")
INFILE=
OUTFILE=
VERBOSE=false
SYSTEM=$(uname -s)

lelegard

#!/usr/bin/env bash
# Create a one-page blank PDF file.
# Optionally with same page size as an existing reference PDF file (default size: A4).

SCRIPT=$(basename "$0")
usage() { echo >&2 "usage: $SCRIPT output-file [reference-file]"; exit 1; }
error() { echo >&2 "$SCRIPT: error: $*"; exit 1; }
warning() { echo >&2 "$SCRIPT: warning: $*"; }

# Find various tools.

lelegard

function Set-WallPaper {
<#
    .SYNOPSIS

    Applies a specified wallpaper to the current user's desktop
    Reference: https://www.joseespitia.com/2017/09/15/set-wallpaper-powershell-function/

    .PARAMETER Image

    Provide the exact path to the image