new file mode 100644
--- /dev/null
+++ b/runtime/syntax/cuplsim.vim
@@ -0,0 +1,80 @@
+" Vim syntax file
+" Language:	CUPL simulation
+" Maintainer:	John Cook <john.cook@kla-tencor.com>
+" Last Change:	2001 Apr 25
+
+" 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
+
+" Read the CUPL syntax to start with
+if version < 600
+  source <sfile>:p:h/cupl.vim
+else
+  runtime! syntax/cupl.vim
+  unlet b:current_syntax
+endif
+
+" omit definition-specific stuff
+syn clear cuplStatement
+syn clear cuplFunction
+syn clear cuplLogicalOperator
+syn clear cuplArithmeticOperator
+syn clear cuplAssignmentOperator
+syn clear cuplEqualityOperator
+syn clear cuplTruthTableOperator
+syn clear cuplExtension
+
+" simulation order statement
+syn match  cuplsimOrder "order:" nextgroup=cuplsimOrderSpec skipempty
+syn region cuplsimOrderSpec start="." end=";"me=e-1 contains=cuplComment,cuplsimOrderFormat,cuplBitVector,cuplSpecialChar,cuplLogicalOperator,cuplCommaOperator contained
+
+" simulation base statement
+syn match   cuplsimBase "base:" nextgroup=cuplsimBaseSpec skipempty
+syn region  cuplsimBaseSpec start="." end=";"me=e-1 contains=cuplComment,cuplsimBaseType contained
+syn keyword cuplsimBaseType octal decimal hex contained
+
+" simulation vectors statement
+syn match cuplsimVectors "vectors:"
+
+" simulator format control
+syn match cuplsimOrderFormat "%\d\+\>" contained
+
+" simulator control
+syn match cuplsimStimulus "[10ckpx]\+"
+syn match cuplsimStimulus +'\(\x\|x\)\+'+
+syn match cuplsimOutput "[lhznx*]\+"
+syn match cuplsimOutput +"\x\+"+
+
+syn sync minlines=1
+
+" 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_cuplsim_syn_inits")
+  if version < 508
+    let did_cuplsim_syn_inits = 1
+    command -nargs=+ HiLink hi link <args>
+  else
+    command -nargs=+ HiLink hi def link <args>
+  endif
+
+  " append to the highlighting links in cupl.vim
+  " The default highlighting.
+  HiLink cuplsimOrder		cuplStatement
+  HiLink cuplsimBase		cuplStatement
+  HiLink cuplsimBaseType	cuplStatement
+  HiLink cuplsimVectors		cuplStatement
+  HiLink cuplsimStimulus	cuplNumber
+  HiLink cuplsimOutput		cuplNumber
+  HiLink cuplsimOrderFormat	cuplNumber
+
+  delcommand HiLink
+endif
+
+let b:current_syntax = "cuplsim"
+" vim:ts=8