uLisp now supports Adafruit’s Metro M4 Grand Central, based on the 128-pin Atmel ATSAMD51P20 Cortex M4 core running at 120 MHz:
It gives you over 50 I/O pins, 30720 cells of uLisp workspace, the ability to save or load from the workspace to the on-board DataFlash using save-image or load-image, and support for the on-board SD card interface.
For more information see Adafruit M4 boards.