Gloomy Wednesday

Added GDB server functionality for remote debugging using GDB.

Yellow Larches

MicroPython improvements:

MicroPython: added headless and UART REPL build modes. Added support for frozen scripts.
MicroPython: implemented compile-time selectable modes for the MicroPython port.
Allow building/running micropython.bin

Frozen lake

RV32IMAC support.

Wisdom tooth

Improved documentation and examples.

Spring Weekend

Added support for memory-mapped IO, memory-mapped UART backed by a a pseudo-terminal, memory-mapped block device backed by a filesystem image file. Added selectable machine timer registers (memory-mapped at standard addressed, and CSR-backed). Performance tweaks (instruction decode cache, word-aligned memory view). Added CircuitPython port. Compliance, robustness and debugging fixes. Better documentation.

Easter break

First feature-complete, reasonable well tested release.