Hi, I have an IBM 40N6989 usb+12V powered VFD pole display. It's a 6 pin device with 2pin for 12V power and other 4pin for usb. When plug it to PC, auto drivered by win10 and named 'IBM Retail USB Character/Graphic Display' as a input device.
The main chip is a Ateml 80251G2D-UM microcontroller, a AGERE USS820D USB Device Controller.
usbdump.txt