xyw is an experimental register/stack virtual machine programmable using an assembly-like concatenative language. It is inspired by Uxn and by early assemblers targeting 8-bit CPUs like the MOS 6502, the Motorola 6809, and the Zilog Z80. IMPORTANT xyw is in very early stage of development! The source code is however available here. overview syntax instructions modes devices directives formats memory key design decisions todo examples/ helloworld.xyw d6.xyw factorial16.xyw factorial8.xyw print-stdin.xyw print-args.xyw on-error.xyw time.xyw fileops.xyw korobeiniki.xyw lib/ macros.xyw putd.xyw putdw.xyw puts.xyw