X65 is a modern 8-bit microcomputer built around the W65C816 CPU, featuring 16 MB flat RAM, custom CGIA video with 256-color palette, sprites, layers, and scrolling, SGU-1 synth and PCM audio, USB and Wi-Fi/Bluetooth, and its native OS/816 for multitasking, shell access, and low-level programming.

K816 - https://github.com/X65/K816 :: high-level assembler (HLA) for the WDC 65816 CPU

cc65-dbg debugger support channel

Sound Generator Unit 1