3 ms·
The ZX80 could literally not do screen sync when the CPU was doing anything else at all. Pressing a key would cause the screen to go flicker.
by jameshart 5y ago
The ZX80 could literally not do screen sync when the CPU was doing anything else at all. Pressing a key would cause the screen to go flicker.
- sys_64738 5y agoThere were some ingenious games for the ZX80 which used cycle counting to precisely time the beam being offscreen to process keyboard input. This allow flicker free keyboard games like you can see on YouTube.