atom syntax for 6502 assembly using the asm6 assembler, enhanced from the original

asm6.cson

'scopeName': 'source.assembly.6502.asm6'
'fileTypes': [
  'asm'
]
'name': '6502 Assembly (asm6)'
'patterns': [
  {
    'match': ';.*\\n?'
    'name': 'comment.line.semicolon'
  }
  {
    'match': '\\b(?i)(adc|and|asl|bit|clc|cld|cli|clv|cmp|cpx|cpy|dec|dex|dey|eor|inc|inx|iny|lda|ldx|ldy|lsr|nop|ora|pha|php|pla|plp|rol|ror|sbc|sec|sed|sei|sta|stx|sty|tax|txa|tay|tya|tsx|txs)\\b'
    'name': 'keyword'
  }
  {
    'match': '\\b(?i)(bcc|bcs|beq|bmi|bne|bpl|brk|bvc|bvs|jmp|jsr|rti|rts)\\b'
    'name': 'keyword.control'
  }
  {
    'match': '(\\.|\\b)(?i)(DB|DW|BYTE|WORD|DCB|DCW|DC\\.B|DC\\.W|DSB|DSW|DS\\.B|DS\\.W|DL|DH|HEX)\\b'
    'name': 'storage.type'
  }
  {
    'match': '(\\.|\\b)(?i)(BASE|ALIGN|PAD|FILLVALUE|ORG)\\b'
    'name': 'storage.modifier'
  }
  {
    'match': '(\\.|\\b)(?i)(EQU|=|INCLUDE|INCSRC|INCBIN|BIN|IF|ELSEIF|ELSE|ENDIF)\\b'
    'name': 'support.function'
  }
  {
    'match': '(\\.|\\b)(?i)(ERROR|ENUM|ENDE|REPT|ENDR|MACRO|ENDM|IFDEF|IFNDEF)\\b'
    'name': 'constant.language'
  }
  {
    'match': '#?\\$[0-9a-fA-F]+'
    'name': 'constant.numeric.hex'
  }
  {
    'match': '#?\\%[0-1]+'
    'name': 'constant.numeric.binary'
  }
  {
    'match': '{[0-9]+}'
    'name': 'variable.parameter.macro'
  }
  {
      'match': '(?i)(^\\s*([+-]+[a-z0-9]?*):?\\s|\\s([+-]+[a-z0-9]?*)(?=\\s*($|;)))'
      'name': 'constant.language'
  }
  {
      'match': '(?i)(,\\s*X|,\\s*Y)\\b'
      'name': 'variable.language'
  }
]