A new batch of stands came off the printer.
Featuring all new latches
Much easier access to the electronicals. Farther placement back. Flaps to keep it from sliding forwards.
New confuser placement.
Plans continued for a pointing device. All attention turned from trackballs back to an old fashioned mouse in the short term, eventually being replaced by a trackpad.
So the Elan 33059 isn't documented anywhere, but it's similar to a more common Synaptics described onhttps://www.hackster.io/frank-adams/laptop-touchpad-conversion-to-usb-d70519
The ribbon cable pinout doesn't match, but the Elan version otherwise has the same signals as the Synaptics. The test points are even labeled
TD - PS2 data
TC - PS2 clock
T13_R - right button
T14_L - left button
T19_RR - scroll right
T20_RU - scroll up
T21_RL - scroll left
T22_RD - scroll down
TN - ?
TP - ?
Source code is scarce. The best example was
There were comments about the source code working with an Elan chip. It bit bangs the PS2 pins. Sadly, a quick test showed TN & TP are not USB pins.