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Jan-Arendt Klingel

Risk Management, Information Security, Retro Computing

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  • Startseite
  • Security
    • The dissection of a transaction with a fraudulent web shop
    • Finally secure: A book to store all your passwords in
    • Dear Unknown Cyber Hacker,
    • Unglaubliche Smartwatch mit EKG Funktion erobert Deutschland im Sturm!
    • DIRNDL SPIDER
    • Wells Fargo Phishing-Email
    • Security Information Overload
  • Retro Computing
    • Programming C on the C64 using POWER C
      • A POWER C Benchmark
      • POWER C does not do struct padding
      • Using POWER C On An Emulated C64
      • Peek and poke in POWER C on the C64
      • Peculiarities of POWER C
    • Replacing Commodore C128D Fan
    • Shooting Stars 2.1 published
    • Arbeiten mit Programmen auf dem C64
    • C64 Programm aus Basic heraus starten
    • The C64 Maxi – hier nicht kaufen!
    • IBM System /360 und /370
  • Risk Management
    • Is Quantitative Risk Management Dead?
    • Es klafft eine Lücke im Bauplan für das Risikomanagement der Informationssicherheit
    • Risikomanagement für die Supply Chain
    • Drei Ausprägungen des Risikomanagements
    • Buch: „Risikomanagement für KMUs“
  • About me
  • Contact
  • Startseite
  • Security
    • The dissection of a transaction with a fraudulent web shop
    • Finally secure: A book to store all your passwords in
    • Dear Unknown Cyber Hacker,
    • Unglaubliche Smartwatch mit EKG Funktion erobert Deutschland im Sturm!
    • DIRNDL SPIDER
    • Wells Fargo Phishing-Email
    • Security Information Overload
  • Retro Computing
    • Programming C on the C64 using POWER C
      • A POWER C Benchmark
      • POWER C does not do struct padding
      • Using POWER C On An Emulated C64
      • Peek and poke in POWER C on the C64
      • Peculiarities of POWER C
    • Replacing Commodore C128D Fan
    • Shooting Stars 2.1 published
    • Arbeiten mit Programmen auf dem C64
    • C64 Programm aus Basic heraus starten
    • The C64 Maxi – hier nicht kaufen!
    • IBM System /360 und /370
  • Risk Management
    • Is Quantitative Risk Management Dead?
    • Es klafft eine Lücke im Bauplan für das Risikomanagement der Informationssicherheit
    • Risikomanagement für die Supply Chain
    • Drei Ausprägungen des Risikomanagements
    • Buch: „Risikomanagement für KMUs“
  • About me
  • Contact
Retro Computing

Two Dimensions Game of Life from 1970

After experimenting with the one dimensional version of the game of life (see https://janklingel.de/2026/07/20/one-dimension-game-of-life-from-1978/), I wanted to do the same in two dimensions. Instead of …

Von Jan-Arendt Klingel
Veröffentlicht amJuli 22, 2026Juli 22, 2026
Retro Computing

One Dimension Game of Life from 1978

Veröffentlicht amJuli 20, 2026Juli 20, 2026

If you are here for the boy band, sorry. This is about mathematics. Usagi on YouTube (https://www.youtube.com/watch?v=bpdYBsgYF_c) gave me the idea to practice my C …

Retro Computing

Multiple Linear Regression

Veröffentlicht amJuni 11, 2026Juni 11, 2026

Today I was able to compile my code for a multiple linear regression (MLR) sucessfully for the first time. See jklingel/Multiple-Linear-Regression: Creating a multiple linear …

Retro Computing

Gaining resilience by toying with obsolete technology

Veröffentlicht amJuni 8, 2026Juni 8, 2026

One thing I learned in life is that you have to replace negative and frustrating topics with something positive, something that gives you back strength, …

Retro Computing

Simple Linear Regression in POWER C

Veröffentlicht amJuni 7, 2026Juni 10, 2026

To get better in programming C and to understand AI (machine learning) a little bit better, I wrote a tool in modern C to estimate …

Retro Computing

Starting a memory monitor from within a POWER C program

Veröffentlicht amApril 30, 2026April 30, 2026

Wouldn’t it be nice if we could start a memory monitor from within our C program? For example if we want to see where the …

Retro Computing

A POWER C Benchmark

Veröffentlicht amApril 20, 2026April 21, 2026

@NoelsRetroLab published an interesting video on YouTube called „TI-99/4A BASIC Performance, Games and Comparison to Other 8 Bit Systems“. In the video, he benchmarks a …

Retro Computing

POWER C does not do struct padding

Veröffentlicht amApril 17, 2026April 20, 2026

A modern C compiler takes a struct data type and pads its elements to i.e. 4 or 8 bytes in order to improve CPU access …

Retro Computing

Peculiarities of POWER C

Veröffentlicht amFebruar 1, 2026Juli 1, 2026

When writing software in POWER C, there are some peculiarities that must be accounted for. POWER C is a programming language from 1986, meaning that …

Retro Computing

Using POWER C On An Emulated C64

Veröffentlicht amJanuar 17, 2026Januar 31, 2026

If you know how, developing code in POWER C using an emulated C64 is not that hard. In contrast to real hardware it even has …

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