English Amiga Board - View Single Post - Does the Amiga scroll in selected areas of the screen?

Foebane · 05 January 2021, 21:18

I often wonder how the Amiga manages the hardware scrolling it is famous for, and recently I saw two demos that exhibit that I think that a selected rectangular region of the screen is selected, and then a direction vector and axis is specified, like -1 for left/up and 1 for right/down or something, with the programmer having to fill in the blanks after scrolling:

[ Show youtube player ]
(move to 0:44 in video)

[ Show youtube player ]
(move to 3:54 in video)

The principle is probably behind the famous parallax scrolling in games like Shadow of the Beast, am I right?

Also, it seems that many areas can be scrolled in one frame, too, as these examples show.

05 January 2021, 21:18	#1
Foebane Banned Join Date: Sep 2011 Location: Cardiff, UK Age: 51 Posts: 2,871	Does the Amiga scroll in selected areas of the screen? I often wonder how the Amiga manages the hardware scrolling it is famous for, and recently I saw two demos that exhibit that I think that a selected rectangular region of the screen is selected, and then a direction vector and axis is specified, like -1 for left/up and 1 for right/down or something, with the programmer having to fill in the blanks after scrolling: [ Show youtube player ] (move to 0:44 in video) [ Show youtube player ] (move to 3:54 in video) The principle is probably behind the famous parallax scrolling in games like Shadow of the Beast, am I right? Also, it seems that many areas can be scrolled in one frame, too, as these examples show.