3 ms·
I seriously doubt that. This certainly wasn't true on the Atari. The Atari had fine scrolling and no need even to redraw newly exposed areas. The screen was, as
by NonNefarious 4y ago
I seriously doubt that. This certainly wasn't true on the Atari. The Atari had fine scrolling and no need even to redraw newly exposed areas. The screen was, as you describe, merely a window upon as much memory as you had available.
Because the Ataris and Commodores had redefinable character sets, you could create graphic elements as characters and build huge maps and scroll around them smoothly with ease.
- tinus_hn 4y agoIt’s a 1mhz processor and for scrolling to be smooth you need to move 2k of memory within one frame. That means if you get the timing right you have at most 1 million/60 clock ticks, which is about 16666, to do the scrolling and everything else you need to do. You really can’t do that ‘with ease’ which is why c64 games typically divide up the screen so the scrolling area is smaller.
- NonNefarious 4y agoYou don't move the memory at all. You move the window. If that's not clear at this point in the discussion (let alone 30 years later) I don't know what to tell you.