Signal Cleanup - VGA from Scratch - Part 17

This is a small modification to the vga circuitry but something I wanted to talk about before designing the final output circuit pcb. This is an update on a tweak I originally did to clean up the output of the Doomed demo, that tweak is less effective now due to the evolution of the vga circuit but in this video I discuss what it was, why it doesn’t work as well now and implement a similar circuit that does improve the output. This all relates to the screen corruption that occurs when the cpu writes to video memory outside of the blanking intervals, something I will still be avoiding in the most demos and games.

0:00 Introduction 1:57 The noise 2:48 Original Tweak 5:13 Timing on the oscilloscope 7:34 New Tweak 11:01 Outro 12:34 Credits ... https://www.youtube.com/watch?v=LAeGkXgCOpE