3 This might one day grow up to become a video output for my 16-bit homebrew
4 computer. At the moment it's trying to display a fixed XOR pattern in 640x480.
8 Copyright (C) 2019 John Tsiombikas <nuclear@member.fsf.org>
9 Creative Commons Attribution Share-Alike (CC BY-SA).
14 pixel clock: 25.175 MHz
16 Horizontal timing in pixels:
18 |----- visible -----|-- FP --|-- HSYNC --|-- BP --|
21 HBLANK: from 640 until HCNT reset at 800
22 ~HSYNC: from 656 until 752
24 Vertical timing in lines:
26 |----- visible -----|-- FP --|-- HSYNC --|-- BP --|
29 VBLANK: from 480 until VCNT reset at 525
30 ~HSYNC: from 490 until 492