2021-01-29 14:17:59 -05:00
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# Uxn
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2021-03-22 22:04:31 -04:00
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A [stack-based VM](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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2021-03-22 22:04:31 -04:00
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To build the Uxn emulator, you must have [SDL2](https://wiki.libsdl.org/).
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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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2021-01-29 14:35:59 -05:00
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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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2021-03-16 12:27:51 -04:00
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%RTN { JMP2r }
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2021-03-21 17:37:39 -04:00
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( devices )
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2021-04-06 13:45:53 -04:00
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|0110 ;Console { vector 2 pad 6 char 1 byte 1 short 2 }
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2021-03-21 17:37:39 -04:00
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( program )
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2021-04-06 13:45:53 -04:00
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|0200
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2021-02-23 16:49:36 -05:00
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2021-03-11 15:19:59 -05:00
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,text1 ,print-label JSR2
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,text2 ,print-label JSR2
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2021-03-13 20:34:08 -05:00
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#ab =Console.byte
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#cdef =Console.short
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2021-02-07 23:49:00 -05:00
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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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2021-02-23 16:49:36 -05:00
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@print-label ( text )
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2021-03-11 15:19:59 -05:00
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2021-03-26 14:45:10 -04:00
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$loop
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( send ) DUP2 PEK2 =Console.char
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2021-03-11 18:47:28 -05:00
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( incr ) #0001 ADD2
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( loop ) DUP2 PEK2 #00 NEQ ^$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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2021-03-14 17:26:17 -04:00
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RTN
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2021-02-23 16:49:36 -05:00
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2021-03-11 18:47:28 -05:00
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@text1 [ Welcome 20 to 20 UxnVM 0a00 ]
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@text2 [ Hello 20 World 0a00 ]
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2021-01-29 14:35:59 -05:00
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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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- Implement Uxambly REPL
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- Load disks at a different place than 0x0000.
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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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- `[ 6a03 4a0d aa0c ]`, purple/cyan
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- `[ a1f3 a14d a16c ]`, grey-pink/teal
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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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