| From: Scott Allen via talk <talk@gtalug.org> | On Tue, 20 Jun 2023 at 10:40, James Knott via talk <talk@gtalug.org> wrote: | > Is this documented anywhere? Sure the audio is sent over the cable, but | > why should there be such a thing as a blanking interval on a digital | > system? | | https://en.wikipedia.org/wiki/Vertical_blanking_interval#Vertical_blanking_i... There is also a horizontal blanking interval. <https://en.wikipedia.org/wiki/Horizontal_blanking_interval> On the Atari ST, in the first wave of consumer computers with a frame buffer, the number of colours on the screen was limited to 16. A paint program called Spectrum 512 could change the colour look-up table during any HBI and thus 512 different colours on the screen (just not on the same line). More extreme: the Atari 2600 had only 128 bytes of RAM! That doesn't seem enough to hold even a single line of the display. <https://en.wikipedia.org/wiki/Atari_2600_hardware>