There are 2 repositories under 65816 topic.
A language-agnostic JSON-encoded instruction-by-instruction test suite for the 8088, 68000, 65816, 65[c]02 and SPC700 that includes bus activity.
An Apple IIgs Emulator and Debugger written in C/C++ for Windows, Linux and macOS
Adds syntax highlighting to 65816/65C816/65802/6502/65C02 files in Atom, with extra support for various compilers.
The WE816 is a 16-bit 65816 based system with 512K of System RAM, 96K of System ROM, 32K of video RAM, a TMS9918 graphics processor and an AY-3-8910 Sound chip. The system runs a custom version of BASIC and supports commodore compatible IEC disk drives.
WIP: A toy SNES emulator written in Go.
An "initial" ANSI(ish) Forth for the W65C265SXB SBC (65816 CPU)
Video Game Music Player for C256 Foenix
WLA Assembly (6502, 65C02, 65816) syntax highlighting
OS-free, tool-free, accurate vt100 emulator for the Apple IIgs
decompression code for Deflate in 65c816
Original SNES Star Fox source code restored to produce 1:1 retail ROM releases on compile
Multi-platform cross-assembler for MOS 6502/65C02/6510/65816 CPUs
65c816 assembly code I've written for Super Mario World ROM hacks