Amiga · original demo

Two Hundred and Twenty-Seven

A demo for the Amiga 500 in the old tradition of the scene — copper bars, a scroller, bobs and music, with its whole source printed and commented.

Source code The book

The demo on the Amiga, red, blue and green copper bars across a black screen, with bobs and a scrolling message at the bottom. — Copper bars, bobs and the scroller

Another frame of the demo, with the copper bars in different positions and the scroller further along. — A few frames later

Grey copper bars drawn one scanline at a time on a dark screen. — The copper bars on their own

Two Hundred and Twenty-Seven is the demo of Amiga Assembly, built in chapter 44 and printed in full, with comments, in appendix K.

It puts the Copper, the Blitter and Paula to work at the same time, in the way the demoscene has done since the Amiga 500 came out: bars of colour that change on every scanline, a scrolling message, bobs drawn by the Blitter, and music on four channels.

Where it comes from

Written line by line in Amiga Assembly:

Chapter 44: Two Hundred and Twenty-Seven: copper bars, a scroller, bobs, and music · ch44/