INTL 3:770/1 3:770/3   
   REPLYADDR ank@spamfence.net   
   REPLYTO 3:770/3.0 UUCP   
   MSGID: <87muiqjwtd.fsf@usenet.ankman.de> 8098ef17   
   REPLY: 1:229/101.0 358b6d2b   
   PID: SoupGate-Win32 v1.05   
   On Sat, 08 Jun 2019 20:32:30 +1300, Frank Linhares wrote:   
   >   
   >  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.   
      
   Thank you and Tom. So vertical interrupts might made this   
   happen. Amazing, because in 1984 the Commodore 64 was only two years old.   
   --   
   Andreas   
      
   My random thoughts and comments   
   https://news-commentaries.blogspot.com/   
      
   --- SoupGate-Win32 v1.05   
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)   
   SEEN-BY: 1/19 123 15/2 16/0 57/0 123/130 131 132/174 153/250 203/0   
   SEEN-BY: 220/70 221/0 1 6 360 226/16 17 229/101 275 354 426 1014 230/0   
   SEEN-BY: 240/5138 5832 5853 249/206 317 400 261/38 267/800 280/5003   
   SEEN-BY: 310/31 317/3 320/119 219 322/0 757 342/200 393/68 633/267   
   SEEN-BY: 633/280 640/1321 1384 712/620 848 770/0 1 3 10 100 340 772/0   
   SEEN-BY: 772/1 210 500 2432/390 2454/119   
   PATH: 770/3 1 712/848 640/1384 221/1 320/219 240/5832 229/426