4 ms·
Right, but the Apple II video generator is already reading 40 bytes per scan line, and is using all 8 bits of each byte to generate the video signal. I would t
by thought_alarm 6y ago
Right, but the Apple II video generator is already reading 40 bytes per scan line, and is using all 8 bits of each byte to generate the video signal. I would think that drawing 8 pixels per byte instead of 7 would have been the simpler thing to implement.
- ddingus 6y agoActually, it's not. In the Apple 1, only 7 bits were output. Expanding that circuit to do graphics would take a byte and still output just 7 bits, simple. People are pretty sure the Apple 1 video circuit was just expanded to do graphics, which is why it's 7, and that left the high bit for a color shift.