Staringlizard has developed an replacement for the Amiga A520 adapter. The Amiv 2.0 can converts the Amiga RGB 15 KHz signal to HDMI to make it possible to connect your A500 or A1200 to a modern screen. The Amiv has buttons to shrink the picture horizontally and move the picture horizontally and vertically.

YouTube: AMIV 2.0 - Amiga A520 adapter HDMI remake