This is intended to become a collection of assembly-language demos for the Agon family of computers:
Right now there's only one demo (Plasma), but once I get that fully optimized, I plan to port over Nyan Cat, and after that... who knows?
Perhaps most importantly, these demos are intended as a vehicle for developing a library of reusable assembly language routines for interacting with the VDP.
- The Agon Community Docs will be of great help in making sense of the code in this repo.
- agon-ez80asm is what I use to build this. Available both as a native Agon assembler, and as a cross-assembler for modern platforms.
A beautiful and flexible plasma effect (YouTube Video) with the following features:
- easily define effects in a standard and concise format
- change the palette independent of the effect
- hold a particular effect on screen indefinitely
- switch immediately to a new effect
- runtime generation of random effects
- adjust parameters to customize effect
q: quith: hold current effect on/offp: switch paletten: next effecta: animation on/offr: toggle random/playlist
The original version had additional commands that are yet to be implemented in the Agon version.
- The C64 demos Plascii Petsma and Produkthandler Kom Her, both by Camelot, were the inspiration for my original Z80 port.
- My original Z80/TMS9918A port ran on the RCBus-compatible TMS9918A board I designed.
- Hackaday.io Article explaining my original port for the TMS9918A.
- The TMS9918A port can also be configured at build-time to run on an MSX, or at least on the emulator I tested it with.
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