language-65asm
                                Adds syntax highlighting to 65816/65C816/65802/6502/65C02 files in Atom, with extra support for various compilers.
                            
                        How to download and setup language-65asm
Open terminal and run command
                                            git clone https://github.com/MatthewCallis/language-65asm.git
                                        
                                        git clone is used to create a copy or clone of language-65asm repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with language-65asm https://github.com/MatthewCallis/language-65asm/archive/master.zip
Or simply clone language-65asm with SSH
                                            [email protected]:MatthewCallis/language-65asm.git                                    
                                    If you have some problems with language-65asm
You may open issue on language-65asm support forum (system) here: https://github.com/MatthewCallis/language-65asm/issuesSimilar to language-65asm repositories
Here you may see language-65asm alternatives and analogs
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