0.40.0 - two more boards, one with no wire at all
The Waveshare ESP32-P4-WIFI6-DEV-KIT became a build target in 0.39.0. It carries both links - 100M Ethernet on a PoE-capable magjack, and an ESP32-C6 for WiFi 6 - and its pins are the ones already in use here, so the overlay declares almost nothing. It is configured from the published schematic; nobody has run this firmware on one yet. One thing to check before wiring: a jumper switches the USB OTG port between HOST and DEVICE, and the KVM needs DEVICE.
Two boards in the same family were looked at and left out. The ESP32-P4-Pico and the ESP32-P4-Core-DEV-KIT have neither Ethernet nor a WiFi co-processor, and a KVM nobody can reach over the network is not much of a KVM.
0.40.0 added the Waveshare ESP32-P4-WIFI6, contributed by @nwomn, who has one. It is the first supported board with no wired port at all. Capture through the C790 and the USB keyboard and mouse are confirmed on hardware, and the pin reservations were checked against the real thing rather than read off a drawing. Its WiFi did not hold at first; what was wrong with it is the next post.
His as well: a drag now keeps its path. Pointer reports were merged into the latest position, which is right while no button is down and wrong while one is - a drag reached the target as a press and a release with nothing in between, so drawing and drag-and-drop lost everything in the middle.