[cctalk] VT-100 Text Windows library

I am looking for a C library that implements a crude windowing system on a VT-100 or compatible terminal via the serial port.  I've seen such things before but not recently. I will be running this on bare metal (no operating system). Preferably the package would use the regional scrolling capabilities of the VT-100 for faster screen updates. I might be able to get Txwindows to work but I am looking for something a bit simpler? Any ideas would be greatly appreciated. Thank you....        Mike