2021-01-29 14:17:59 -05:00
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# Uxn
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2021-05-01 12:59:57 -04:00
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An [8-bit stack-based computer](https://wiki.xxiivv.com/site/uxn.html), written in ANSI C.
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2021-01-29 14:35:59 -05:00
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2021-03-22 22:04:31 -04:00
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## Build
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2021-02-11 21:48:45 -05:00
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2021-05-01 12:59:57 -04:00
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To build the Uxn emulator, you must have [SDL2](https://wiki.libsdl.org/) and [Portmidi](http://portmedia.sourceforge.net/portmidi/).
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2021-02-11 21:48:45 -05:00
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2021-03-22 22:04:31 -04:00
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```sh
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./build.sh
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--debug # Add debug flags to compiler
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--cli # Run rom without graphics
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2021-02-11 21:48:45 -05:00
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```
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2021-03-24 12:39:19 -04:00
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## Emulator Controls
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- `ctrl+h` toggle debugger
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- `alt+h` toggle zoom
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2021-03-11 23:41:35 -05:00
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## Uxambly
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2021-03-11 23:41:35 -05:00
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Read more in the [Uxambly Guide](https://wiki.xxiivv.com/site/uxambly.html).
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2021-02-06 13:39:13 -05:00
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2021-01-29 14:35:59 -05:00
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```
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2021-04-21 12:48:04 -04:00
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( dev/console )
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2021-03-16 12:27:51 -04:00
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%RTN { JMP2r }
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2021-04-21 12:48:04 -04:00
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( devices )
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|10 @Console [ &pad $8 &char $1 ]
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( init )
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2021-03-21 17:37:39 -04:00
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2021-04-21 12:48:04 -04:00
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|0100 ( -> )
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2021-02-23 16:49:36 -05:00
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2021-05-01 12:59:57 -04:00
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;hello-word ,print JSR
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2021-04-20 14:32:26 -04:00
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2021-02-13 16:21:05 -05:00
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BRK
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2021-02-05 17:01:34 -05:00
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2021-04-29 00:00:39 -04:00
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@print ( addr* -- )
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2021-03-11 15:19:59 -05:00
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2021-04-20 14:32:26 -04:00
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&loop
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2021-04-21 14:12:42 -04:00
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( send ) DUP2 GET .Console/char DEO
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( incr ) #0001 ADD2
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( loop ) DUP2 GET #00 NEQ ,&loop JNZ
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2021-02-23 16:49:36 -05:00
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POP2
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2021-03-01 12:38:54 -05:00
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2021-04-20 14:32:26 -04:00
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RTN
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2021-04-21 14:12:42 -04:00
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@hello-word "hello 20 "World!
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```
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2021-02-08 17:49:45 -05:00
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## TODOs
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2021-02-01 14:58:47 -05:00
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2021-04-02 23:40:53 -04:00
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- Shortcut to export/import disk state
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2021-03-11 15:19:59 -05:00
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2021-03-08 13:30:13 -05:00
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## Palettes
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2021-04-13 14:38:22 -04:00
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- `#6a03` `#4a0d` `#aa0c`, purple/cyan
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- `#a1f3` `#a14d` `#a16c`, grey-pink/teal
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- `#8c4b` `#884b` `#e8bb`, commodore64
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2021-03-08 13:30:13 -05:00
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2021-01-30 17:25:48 -05:00
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## Refs
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https://code.9front.org/hg/plan9front/file/a7f9946e238f/sys/src/games/nes/cpu.c
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http://www.w3group.de/stable_glossar.html
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http://www.emulator101.com/6502-addressing-modes.html
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http://forth.works/8f0c04f616b6c34496eb2141785b4454
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2021-02-05 23:18:30 -05:00
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https://justinmeiners.github.io/lc3-vm/
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