70 lines
3.0 KiB
Markdown
70 lines
3.0 KiB
Markdown
# vim-syntax-asm_ca65
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Vim syntax highlighting for the `ca65` assembler.
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## Purpose
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This repository provides `asm_ca65.vim`, a [Vim](http://www.vim.org/)
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syntax-highlighting module for the
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[`ca65`](http://cc65.github.io/doc/ca65.html) assembler.
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`ca65` is a full-featured assembler for the [MOS
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6502](https://en.wikipedia.org/wiki/MOS_Technology_6502) family of
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microprocessors, which powered such historic platforms as the KIM I, Apple II,
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Commodore 64, and Nintendo Entertainment System. It is a part of the popular
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[`cc65`](https://github.com/cc65/cc65) suite of development tools for the 6502,
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which also includes a C compiler, linker, object dumper, etc. `ca65` is
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designed both for direct use by assembly programmers and as the compilation
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target of the `cc65` C compiler. `ca65` is especially used by "homebrew"
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communities for the [NES](http://nesdev.com), SNES, etc.
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The stock Vim runtime distribution includes syntax modules for several dialects
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of assembly, as well as a "generic" module (which is really for the GNU
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Assembler), none of which works particularly well with 6502 assembly
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conventions, and especially not with `ca65`'s many added features.
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## Features
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* Highlights 6502 instruction mnemonics as keywords, with special highlighting
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for "illegal" instructions, and error highlighting for unknown (typo)
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instructions.
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* Highlights all valid `ca65` numeric and string literals, label
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definitions, and comments, with special highlighting for TODOs, FIXMEs, etc.
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* Highlights all valid expression operators and control comands, with special
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treatment for various classes of commands, including `.fileopt`, segment
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names, includes, macro definitions, storage types, conditional assembly,
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linker control commands, structs, unions, procedures, pseudo-functions, some
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built-in macros, console output commands (`.out`, `.warn`, .etc.), and
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assembler behavior switches.
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### Examples (screenshots)
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#### Solarized colorscheme
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#### Elflord colorscheme
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## Limitations
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* `asm_ca65.vim` currently has no awareness of, or support for, assembler
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options that change the rules of valid labels, identifiers, and literals from
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their defaults, for example the following `.feature` options and related
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command-line switches to `ca65`.
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* `.feature at_in_identifiers`
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* `.feature dollar_in_identifiers`
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* `.feature labels_without_colons`
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* `.feature underline_in_numbers`
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## Installation
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Simply place `asm_ca65.vim` in your `~/.vim/syntax/` directory, or, if you use
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Pathogen, clone this repository under `~/.vim/bundle/`.
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## Usage
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`:set syntax=asm_ca65` or create an `autocmd`, as with any syntax module.
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