The main component of this schematic is called aZRaEL_vram2vgaAmstradMiaow, due to my first experimentation about drawing a picture on VGA screen.
VGA display component does use the same parameters than unix '''modeline''' command, that's all you need, with that parameters you can display something on VGA at the frequency/resolution you choose.
[[File:aZRaEL_RAM_test_ok_zoom4_decal64_inv.jpg]]