Subj : Re: Summer Games
To   : Tom Lake
From : Frank Linhares
Date : Sat Jun 08 2019 08:32 pm

 TL> As long as the doves stay in the sky and the fire stays OUT of the sky
 TL> and away from the ground, they might have used vertical interrupts to
 TL> switch sprite sets as the electron beam hit certain parts of the screen.
 TL> Think of it like a layer cake. Each 
 TL> layer can have up to eight sprites which are independent of the sprites
 TL> in any other layer. On the 64, the layers can be different widths. You
 TL> can have dozens of sprites on the screen at the same time but each group
 TL> of eight can only stay in its own 
 TL> layer.

Many of the demo scene demos from back in the day (and currently) took
advantage of vertical interrupts to make incredible demos. I would bet that
Epyx did the same.

frank%netsurge%demonic
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