This is the disassembled and slightly modernized version of an Amiga intro by United Forces, released in 1991.
The disassembly was done using ReSource V6.06 on an emulated Amiga. Further editing and testing was done using Visual Studio Code with the Amiga Assembly extension.
The intro is interesting because it uses a single line of 6 bitplanes in memory to create a continuous stream of colored lines down the screen. It creates an image with 64 colors and the timing of the bitplane modification on the original 68000 is so tight that it is sort of "racing the beam", keeping up with the screen update on the monitor.
The disassembly was not done to the last bit and I might have misunderstood certain functions of the code, so bear with me. The intro assembles in VS Code and works in the supplied form.
The following changes were done to the code:
- Added the modern startup.i code by StingRay.
- Removed restoring the system display that is now handled by startup.i.
MnemoTroN / Spreadpoint, 2024-04-02