diff --git a/runtime/syntax/a65.vim b/runtime/syntax/a65.vim
new file mode 100644
index 0000000..dbf1cdb
--- /dev/null
+++ b/runtime/syntax/a65.vim
@@ -0,0 +1,166 @@
+" Vim syntax file
+" Language:	xa 6502 cross assembler
+" Maintainer:	Clemens Kirchgatterer <clemens@thf.ath.cx>
+" Last Change:	2003 May 03
+
+" For version 5.x: Clear all syntax items
+" For version 6.x: Quit when a syntax file was already loaded
+if version < 600
+  syntax clear
+elseif exists("b:current_syntax")
+  finish
+endif
+
+syn case ignore
+
+" Opcodes
+syn match a65Opcode	"\<PHP\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<PLA\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<PLX\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<PLY\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<SEC\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<CLD\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<SED\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<CLI\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<BVC\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<BVS\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<BCS\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<BCC\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<DEY\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<DEC\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<CMP\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<CPX\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<BIT\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<ROL\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<ROR\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<ASL\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<TXA\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<TYA\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<TSX\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<TXS\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<LDA\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<LDX\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<LDY\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<STA\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<PLP\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<BRK\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<RTI\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<NOP\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<SEI\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<CLV\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<PHA\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<PHX\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<BRA\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<JMP\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<JSR\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<RTS\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<CPY\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<BNE\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<BEQ\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<BMI\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<LSR\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<INX\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<INY\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<INC\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<ADC\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<SBC\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<AND\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<ORA\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<STX\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<STY\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<STZ\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<EOR\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<DEX\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<BPL\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<CLC\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<PHY\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<TRB\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<BBR\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<BBS\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<RMB\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<SMB\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<TAY\($\|\s\)" nextgroup=a65Address
+syn match a65Opcode	"\<TAX\($\|\s\)" nextgroup=a65Address
+
+" Addresses
+syn match a65Address	"\s*!\=$[0-9A-F]\{2}\($\|\s\)"
+syn match a65Address	"\s*!\=$[0-9A-F]\{4}\($\|\s\)"
+syn match a65Address	"\s*!\=$[0-9A-F]\{2},X\($\|\s\)"
+syn match a65Address	"\s*!\=$[0-9A-F]\{4},X\($\|\s\)"
+syn match a65Address	"\s*!\=$[0-9A-F]\{2},Y\($\|\s\)"
+syn match a65Address	"\s*!\=$[0-9A-F]\{4},Y\($\|\s\)"
+syn match a65Address	"\s*($[0-9A-F]\{2})\($\|\s\)"
+syn match a65Address	"\s*($[0-9A-F]\{4})\($\|\s\)"
+syn match a65Address	"\s*($[0-9A-F]\{2},X)\($\|\s\)"
+syn match a65Address	"\s*($[0-9A-F]\{2}),Y\($\|\s\)"
+
+" Numbers
+syn match a65Number	"#\=[0-9]*\>"
+syn match a65Number	"#\=$[0-9A-F]*\>"
+syn match a65Number	"#\=&[0-7]*\>"
+syn match a65Number	"#\=%[01]*\>"
+
+syn case match
+
+" Types
+syn match a65Type	"\(^\|\s\)\.byt\($\|\s\)"
+syn match a65Type	"\(^\|\s\)\.word\($\|\s\)"
+syn match a65Type	"\(^\|\s\)\.asc\($\|\s\)"
+syn match a65Type	"\(^\|\s\)\.dsb\($\|\s\)"
+syn match a65Type	"\(^\|\s\)\.fopt\($\|\s\)"
+syn match a65Type	"\(^\|\s\)\.text\($\|\s\)"
+syn match a65Type	"\(^\|\s\)\.data\($\|\s\)"
+syn match a65Type	"\(^\|\s\)\.bss\($\|\s\)"
+syn match a65Type	"\(^\|\s\)\.zero\($\|\s\)"
+syn match a65Type	"\(^\|\s\)\.align\($\|\s\)"
+
+" Blocks
+syn match a65Section	"\(^\|\s\)\.(\($\|\s\)"
+syn match a65Section	"\(^\|\s\)\.)\($\|\s\)"
+
+" Strings
+syn match a65String	"\".*\""
+
+" Programm Counter
+syn region a65PC	start="\*=" end="\>" keepend
+
+" HI/LO Byte
+syn region a65HiLo	start="#[<>]" end="$\|\s" contains=a65Comment keepend
+
+" Comments
+syn keyword a65Todo	TODO XXX FIXME BUG contained
+syn match   a65Comment	";.*"hs=s+1 contains=a65Todo
+syn region  a65Comment	start="/\*" end="\*/" contains=a65Todo,a65Comment
+
+" Preprocessor
+syn region a65PreProc	start="^#" end="$" contains=a65Comment,a65Continue
+syn match  a65End			excludenl /end$/ contained
+syn match  a65Continue	"\\$" contained
+
+" Define the default highlighting.
+" For version 5.7 and earlier: only when not done already
+" For version 5.8 and later: only when an item doesn't have highlighting yet
+if version >= 508 || !exists("did_a65_syntax_inits")
+  if version < 508
+    let did_a65_syntax_inits = 1
+    command -nargs=+ HiLink hi link <args>
+  else
+    command -nargs=+ HiLink hi def link <args>
+  endif
+
+  HiLink a65Section	Special
+  HiLink a65Address	Special
+  HiLink a65Comment	Comment
+  HiLink a65PreProc	PreProc
+  HiLink a65Number	Number
+  HiLink a65String	String
+  HiLink a65Type	Statement
+  HiLink a65Opcode	Type
+  HiLink a65PC		Error
+  HiLink a65Todo	Todo
+  HiLink a65HiLo	Number
+
+  delcommand HiLink
+endif
+
+let b:current_syntax = "a65"