I looked up the A2024
The monitor is quite unique in that it contains an internal framebuffer which is controlled via the RGBI lines of the video port [...] The monitor manages to achieve the high resolutions by effectively buffering four Amiga screens, whereby each screen displays a portion of the overall picture. Because of this, the "effective" refresh rate decreases to around 10-15Hz (software configurable). [...] It seems that the monitor by be able to individually refresh the separate quadrants of the screen, as the quadrant which contains the mouse cursor appears to be updated more frequently
What an amazing hack! Reminds me of the lengths people went to add larger external displays to the early 9" Macs using SCSI graphics cards that basically re-implemented QuickDraw