retrocomputing ephemera

Calculating sunrise and sunset times

Posted on 6 January 2022 by Tim

Winter can be a dismal time in the UK. At least we’re now a few days past the winter solstice, so the mornings and evenings are starting to get brighter.

Advent of Code 2021 – Day 25

Posted on 28 December 202131 December 2021 by Tim

The days between Christmas and the new year are always quiet. The weather has been miserable and I’m not feeling particularly inspired to carry on with a brick breaker game

Reviving and repairing a Sharp MZ-700

Posted on 27 November 202128 November 2021 by Tim

I recently acquired a second Sharp MZ-700 that was in a rather poor state. I had no idea whether or not it could be salvaged when I bought it, but

Moonlander

Posted on 1 September 20214 May 2025 by Tim

August’s coding project was an implementation of a Moonlander game in S-BASIC for the Sharp MZ-700. It was inspired by a version created by @electron_greg for the Commodore PET and

The drinking game problem

Posted on 8 August 202126 October 2021 by Tim

Hot on the heels of the 100 door problem, here is a monte carlo simulation for the drinking game problem as described by Mr Barton Maths and others. You have

The 100 door problem

Posted on 6 August 202126 October 2021 by Tim

Retro Computing twitter is a much more tolerant place than covid or politics twitter. By way of an example I had a lovely exchange with fellow retro enthusiast Michael Doornbos

FORTRAN on the Sharp MZ-700

Posted on 14 June 202126 October 2021 by Tim

Yes, really! The sharpmz.no site has a number of programs preserved for download. One of them is the BBG RealFortran compiler, v1, written by Bialke, Berendsen and Gliszczynski. I converted

Gnu Blat 2000

Posted on 5 May 202126 October 2021 by Tim

I’ve finally got a version of my MZ-700 game – Gnu Blat 2000 – working. While it’s playable, it’s not really finished, but as we’re now a few days past

Foundations laid

Posted on 28 March 202126 October 2021 by Tim

I’m writing a new MZ-700 game as a way of raising funds for Lymphoma Action during April 2021. I know its not quite April yet, but I’ve been laying a

A new addition: Sharp MZ-700

Posted on 21 March 202126 October 2021 by Tim

A new addition to my collection of Z80-based machines arrived this week. It’s a Sharp MZ-700 series machine – the 721, as it has an integral tape drive. As far

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retrocomputing ephemera