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Home→Categories 65816

Category Archives: 65816

Retro Basic Benchmarking with Mandelbrot

Posted on October 5, 2023 by Gordon

For a long time I’ve been writing Mandelbrot programs for fun and recently to act as a benchmark for some retro BASIC systems. The output has been variable from simple ASCII text to high resolution colour graphics. For retro systems… … Continue reading →

Posted in 6502, 65816, BASIC, Benchmark, General Update, retro, ruby | Tagged 6502, BASIC, Benchmarking, interpreter, retro, ruby

APRICOT – A PRogrammable Interactive Calculate O Tron

Posted on July 19, 2023 by Gordon

What a weird name, but I wanted something with calculate and tron it it, so there you go… What is it? APRICOT is a programmable calculator. A very simple one but it’s quite effective and Turing Complete if you want … Continue reading →

Posted in 6502, 65816, APRICOT, BASIC, BCPL, C, Language, ruby

Retro BASIC and BCPL Benchmarks

Posted on March 24, 2023 by Gordon

Doing some tinkering with my retro BCPL system recently and while I’ve always though it was faster than BASIC on the same hardware, I never really worked out just how much faster it really was… So as it was a … Continue reading →

Posted in 6502, 65816, BASIC, BCPL, Benchmark, General Update, retro, ruby

The Humble “Glass Teletype” and the Lazy Programmer…

Posted on June 24, 2020 by Gordon

Way back we had mechanical output devices for our computers. These were big, slow, noisy and really a spill-over from the days of the telegraph, but they fulfilled their purpose and much code, including early Unix was written using them. … Continue reading →

Posted in 6502, 65816, BCPL, General Update, retro

Ruby816 – Solving the bootstrap paradox

Posted on June 16, 2020 by Gordon

Previously I wrote about the issues bootstrapping BCPL on my Ruby board and I was moaning about needing a C front-end or “shim” to get BCPL going. So I engaged the little grey cells and worked out a strategy… What … Continue reading →

Posted in 6502, 65816, BCPL, ruby | Tagged bcpl, bootstrap, hello world, ruby816

Video Demos..

Posted on August 18, 2019 by Gordon

I’ve just watched Dave Murrays demo of his “Vera” video card moving some balls round the screen. Initially confused by how it was working, but now understand that it’s to do with the way the colour works in text-mode, so … Continue reading →

Posted in 6502, 65816, atmega, BASIC, General Update, retro, ruby, video | Tagged 6502, 65816, BASIC, ruby

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