Back in the day, those of us who did advanced video tricks on the Atari (opening borders, hardware scrolling on hw without hardware scroll) knew that there were differences between systems, and sometimes on the same system. After some trial and error you built in some compensation which made things work “always” on all systems. Today we know that a lot of this comes from the fact that the GLUE and the CPU, while both running at 8MHz, can be offset from one another 0-3 cycles (since the master clock everything’s divided from is 32MHz).
Atari · English · Retro · Uncategorized
3 minutes