# Uxn An [8-bit stack-based computer](https://wiki.xxiivv.com/site/uxn.html), written in ANSI C. ## Build To build the Uxn emulator on Linux, you must have [SDL2](https://wiki.libsdl.org/). ```sh ./build.sh --debug # Add debug flags to compiler --cli # Run rom without graphics ``` To build the Uxn emulator on [9front](http://9front.org/), via [npe](https://git.sr.ht/~ft/npe): ```rc mk ``` If the build fails on 9front because of missing headers or functions, try again after `rm -r /sys/include/npe`. ## Emulator Controls - `ctrl+h` toggle debugger - `alt+h` toggle zoom ## Uxambly Read more in the [Uxambly Guide](https://wiki.xxiivv.com/site/uxambly.html). ``` ( dev/console ) %RTN { JMP2r } ( devices ) |10 @Console [ &pad $8 &char $1 ] ( init ) |0100 ( -> ) ,hello-word &loop ( send ) LDRk .Console/char DEO ( incr ) #01 ADD ( loop ) DUP ,&loop JCN POP BRK @hello-word "hello 20 "World! ``` ## TODOs - Shortcut to export/import disk state ## Palettes - `#6a03` `#4a0d` `#aa0c`, purple/cyan - `#a1f3` `#a14d` `#a16c`, grey-pink/teal - `#8c4b` `#884b` `#e8bb`, commodore64 ## Convert audio for Unx ```sox sub202_C.wav -b 8 -c 1 -e signed output.raw``` ## Refs https://code.9front.org/hg/plan9front/file/a7f9946e238f/sys/src/games/nes/cpu.c http://www.w3group.de/stable_glossar.html http://www.emulator101.com/6502-addressing-modes.html http://forth.works/8f0c04f616b6c34496eb2141785b4454 https://justinmeiners.github.io/lc3-vm/