If you want to know the details of how it works, see US patent 4851826: https://patents.google.com/patent/US4851826A/en

BBoAH has a pic of an actual A2024: https://bigbookofamigahardware.com/bboah/product.aspx?id=863

There was also a separate video card containing the framebuffer hardware, that could be connected to a "normal" high-res mono monitor: http://amiga.resource.cx/exp/moniterm

There are brilliant hacks and terrible kludges. This is the latter.

Yikes!