A simple tic-80 fantasy console card in Lua scrtipting language, that display some possible effects of vbank() usage. That's an equivalent to Amiga, hardware video bitmap mixing. This kind of video mixing technology still exists on several ARM SoCs. At least seen on AllWinner and Rockchip SoCs.

Vbank are

Two independant 16 colours palette layers
Can be modified independantly, during TIC() main function, or even BDR() rastersync function, allowing nice effects
the vbank(1) accept a transparent colour to display under layer through. By default it's colour 0.

It replace former OVR() "overlay" function mode. See this old demo

Table of Content

Filling of the background
- Prepare the tiles map
- Copy tile map to the screen
Using vbank() to switch video banks
Sprite trick
Realtime fantasy hardware accelerated twist and colors effects
The demo

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Table of Content