diff --git a/syntax-files/Vim/prog8.vim b/syntax-files/Vim/prog8.vim
index 58f4987da..75fdb8774 100644
--- a/syntax-files/Vim/prog8.vim
+++ b/syntax-files/Vim/prog8.vim
@@ -1,7 +1,7 @@
 " Vim syntax file
 " Language: Prog8
 " Maintainer: Elektron72
-" Latest Revision: 22 March 2021
+" Latest Revision: 23 March 2021
 
 if exists("b:current_syntax")
     finish
@@ -31,7 +31,7 @@ syn keyword prog8Conditional if_pl if_pos if_mi if_neg
 syn keyword prog8Conditional when
 syn keyword prog8Repeat for while in do until repeat
 syn match prog8Label "\<\w\+\>:"
-syn keyword prog8Operator and or to downto as
+syn keyword prog8Operator and or to downto as void
 
 syn match prog8Directive "\(^\|\s\)%\(target\|output\|launcher\|zeropage\)\>"
 syn match prog8Directive "\(^\|\s\)%\(zpreserved\|address\|import\|option\)\>"
@@ -51,13 +51,21 @@ syn region prog8Expression start="(" end=")" transparent
 syn region prog8Array start="\[" end="\]" transparent
 
 
+if !exists("g:prog8_no_highlight_builtins")
+    runtime! syntax/prog8_builtins.vim
+endif
+
+
 syn region prog8Asm start="\(%asm\)\@16<=\s\+{{" end="}}" contains=
             \prog8Comment,
             \prog8Character,
             \prog8Number,
             \prog8AsmIdentifier,
             \prog8AsmStatement,
-            \prog8AsmLabel
+            \prog8AsmLabel,
+            \prog8BuiltInVar,
+            \prog8BuiltInFunc
+syn sync match prog8AsmSync groupthere prog8Asm "%asm\s\+{{"
 
 syn keyword prog8AsmIdentifier a x y contained
 
diff --git a/syntax-files/Vim/prog8_builtins.vim b/syntax-files/Vim/prog8_builtins.vim
new file mode 100644
index 000000000..d737d5a75
--- /dev/null
+++ b/syntax-files/Vim/prog8_builtins.vim
@@ -0,0 +1,820 @@
+" Vim syntax file
+" Language: Prog8 (built-in functions)
+" Maintainer: Elektron72
+" Latest Revision: 23 March 2021
+
+
+" Built-in functions
+
+" Math functions
+syn keyword prog8BuiltInFunc abs atan ceil cos cos8u cos8 cos16u cos16 deg floor
+syn keyword prog8BuiltInFunc ln log2 rad round sin sgn sin8u sin8 sin16u sin16
+syn keyword prog8BuiltInFunc sqrt16 sqrt tan
+
+" Array functions
+syn keyword prog8BuiltInFunc any all len max min reverse sum sort
+
+" Miscellaneous functions
+syn keyword prog8BuiltInFunc cmp lsb msb mkword peek peekw poke pokew rnd rndw
+syn keyword prog8BuiltInFunc rndf fastrnd8 rol rol2 ror ror2 sizeof offsetof
+syn keyword prog8BuiltInFunc swap memory
+
+
+" c64/floats.p8
+syn match prog8BuiltInVar "\<floats\.PI\>"
+syn match prog8BuiltInVar "\<floats\.TWOPI\>"
+syn match prog8BuiltInFunc "\<floats\.MOVFM\>"
+syn match prog8BuiltInFunc "\<floats\.FREADMEM\>"
+syn match prog8BuiltInFunc "\<floats\.CONUPK\>"
+syn match prog8BuiltInFunc "\<floats\.FAREADMEM\>"
+syn match prog8BuiltInFunc "\<floats\.MOVFA\>"
+syn match prog8BuiltInFunc "\<floats\.MOVAF\>"
+syn match prog8BuiltInFunc "\<floats\.MOVEF\>"
+syn match prog8BuiltInFunc "\<floats\.MOVMF\>"
+syn match prog8BuiltInFunc "\<floats\.FTOSWORDYA\>"
+syn match prog8BuiltInFunc "\<floats\.GETADR\>"
+syn match prog8BuiltInFunc "\<floats\.QINT\>"
+syn match prog8BuiltInFunc "\<floats\.AYINT\>"
+syn match prog8BuiltInFunc "\<floats\.GIVAYF\>"
+syn match prog8BuiltInFunc "\<floats\.FREADUY\>"
+syn match prog8BuiltInFunc "\<floats\.FREADSA\>"
+syn match prog8BuiltInFunc "\<floats\.FREADSTR\>"
+syn match prog8BuiltInFunc "\<floats\.FPRINTLN\>"
+syn match prog8BuiltInFunc "\<floats\.FOUT\>"
+syn match prog8BuiltInFunc "\<floats\.FADDH\>"
+syn match prog8BuiltInFunc "\<floats\.MUL10\>"
+syn match prog8BuiltInFunc "\<floats\.DIV10\>"
+syn match prog8BuiltInFunc "\<floats\.FCOMP\>"
+syn match prog8BuiltInFunc "\<floats\.FADDT\>"
+syn match prog8BuiltInFunc "\<floats\.FADD\>"
+syn match prog8BuiltInFunc "\<floats\.FSUBT\>"
+syn match prog8BuiltInFunc "\<floats\.FSUB\>"
+syn match prog8BuiltInFunc "\<floats\.FMULTT\>"
+syn match prog8BuiltInFunc "\<floats\.FMULT\>"
+syn match prog8BuiltInFunc "\<floats\.FDIVT\>"
+syn match prog8BuiltInFunc "\<floats\.FDIV\>"
+syn match prog8BuiltInFunc "\<floats\.FPWRT\>"
+syn match prog8BuiltInFunc "\<floats\.FPWR\>"
+syn match prog8BuiltInFunc "\<floats\.FINLOG\>"
+syn match prog8BuiltInFunc "\<floats\.NOTOP\>"
+syn match prog8BuiltInFunc "\<floats\.INT\>"
+syn match prog8BuiltInFunc "\<floats\.LOG\>"
+syn match prog8BuiltInFunc "\<floats\.SGN\>"
+syn match prog8BuiltInFunc "\<floats\.SIGN\>"
+syn match prog8BuiltInFunc "\<floats\.ABS\>"
+syn match prog8BuiltInFunc "\<floats\.SQR\>"
+syn match prog8BuiltInFunc "\<floats\.SQRA\>"
+syn match prog8BuiltInFunc "\<floats\.EXP\>"
+syn match prog8BuiltInFunc "\<floats\.NEGOP\>"
+syn match prog8BuiltInFunc "\<floats\.RND\>"
+syn match prog8BuiltInFunc "\<floats\.COS\>"
+syn match prog8BuiltInFunc "\<floats\.SIN\>"
+syn match prog8BuiltInFunc "\<floats\.TAN\>"
+syn match prog8BuiltInFunc "\<floats\.ATN\>"
+syn match prog8BuiltInFunc "\<floats\.FREADS32\>"
+syn match prog8BuiltInFunc "\<floats\.FREADUS32\>"
+syn match prog8BuiltInFunc "\<floats\.FREADS24AXY\>"
+syn match prog8BuiltInFunc "\<floats\.GIVUAYFAY\>"
+syn match prog8BuiltInFunc "\<floats\.GIVAFAY\>"
+syn match prog8BuiltInFunc "\<floats\.FTOSWRDAY\>"
+syn match prog8BuiltInFunc "\<floats\.GETADRAY\>"
+syn match prog8BuiltInFunc "\<floats\.print_f\>"
+
+
+" c64/graphics.p8
+syn match prog8BuiltInVar "\<graphics\.BITMAP_ADDRESS\>"
+syn match prog8BuiltInVar "\<graphics\.WIDTH\>"
+syn match prog8BuiltInVar "\<graphics\.HEIGHT\>"
+syn match prog8BuiltInFunc "\<graphics\.enable_bitmap_mode\>"
+syn match prog8BuiltInFunc "\<graphics\.disable_bitmap_mode\>"
+syn match prog8BuiltInFunc "\<graphics\.clear_screen\>"
+syn match prog8BuiltInFunc "\<graphics\.line\>"
+syn match prog8BuiltInFunc "\<graphics\.rect\>"
+syn match prog8BuiltInFunc "\<graphics\.fillrect\>"
+syn match prog8BuiltInFunc "\<graphics\.horizontal_line\>"
+syn match prog8BuiltInFunc "\<graphics\.vertical_line\>"
+syn match prog8BuiltInFunc "\<graphics\.circle\>"
+syn match prog8BuiltInFunc "\<graphics\.disc\>"
+syn match prog8BuiltInFunc "\<graphics\.plot\>"
+
+
+" c64/syslib.p8
+syn match prog8BuiltInVar "\<c64\.TIME_HI\>"
+syn match prog8BuiltInVar "\<c64\.TIME_MID\>"
+syn match prog8BuiltInVar "\<c64\.TIME_LO\>"
+syn match prog8BuiltInVar "\<c64\.STATUS\>"
+syn match prog8BuiltInVar "\<c64\.STKEY\>"
+syn match prog8BuiltInVar "\<c64\.SFDX\>"
+syn match prog8BuiltInVar "\<c64\.COLOR\>"
+syn match prog8BuiltInVar "\<c64\.HIBASE\>"
+syn match prog8BuiltInVar "\<c64\.CINV\>"
+syn match prog8BuiltInVar "\<c64\.NMI_VEC\>"
+syn match prog8BuiltInVar "\<c64\.RESET_VEC\>"
+syn match prog8BuiltInVar "\<c64\.IRQ_VEC\>"
+syn match prog8BuiltInVar "\<c64\.SPRPTR0\>"
+syn match prog8BuiltInVar "\<c64\.SPRPTR1\>"
+syn match prog8BuiltInVar "\<c64\.SPRPTR2\>"
+syn match prog8BuiltInVar "\<c64\.SPRPTR3\>"
+syn match prog8BuiltInVar "\<c64\.SPRPTR4\>"
+syn match prog8BuiltInVar "\<c64\.SPRPTR5\>"
+syn match prog8BuiltInVar "\<c64\.SPRPTR6\>"
+syn match prog8BuiltInVar "\<c64\.SPRPTR7\>"
+syn match prog8BuiltInVar "\<c64\.SPRPTR\>"
+syn match prog8BuiltInVar "\<c64\.SP0X\>"
+syn match prog8BuiltInVar "\<c64\.SP0Y\>"
+syn match prog8BuiltInVar "\<c64\.SP1X\>"
+syn match prog8BuiltInVar "\<c64\.SP1Y\>"
+syn match prog8BuiltInVar "\<c64\.SP2X\>"
+syn match prog8BuiltInVar "\<c64\.SP2Y\>"
+syn match prog8BuiltInVar "\<c64\.SP3X\>"
+syn match prog8BuiltInVar "\<c64\.SP3Y\>"
+syn match prog8BuiltInVar "\<c64\.SP4X\>"
+syn match prog8BuiltInVar "\<c64\.SP4Y\>"
+syn match prog8BuiltInVar "\<c64\.SP5X\>"
+syn match prog8BuiltInVar "\<c64\.SP5Y\>"
+syn match prog8BuiltInVar "\<c64\.SP6X\>"
+syn match prog8BuiltInVar "\<c64\.SP6Y\>"
+syn match prog8BuiltInVar "\<c64\.SP7X\>"
+syn match prog8BuiltInVar "\<c64\.SP7Y\>"
+syn match prog8BuiltInVar "\<c64\.SPXY\>"
+syn match prog8BuiltInVar "\<c64\.SPXYW\>"
+syn match prog8BuiltInVar "\<c64\.MSIGX\>"
+syn match prog8BuiltInVar "\<c64\.SCROLY\>"
+syn match prog8BuiltInVar "\<c64\.RASTER\>"
+syn match prog8BuiltInVar "\<c64\.LPENX\>"
+syn match prog8BuiltInVar "\<c64\.LPENY\>"
+syn match prog8BuiltInVar "\<c64\.SPENA\>"
+syn match prog8BuiltInVar "\<c64\.SCROLX\>"
+syn match prog8BuiltInVar "\<c64\.YXPAND\>"
+syn match prog8BuiltInVar "\<c64\.VMCSB\>"
+syn match prog8BuiltInVar "\<c64\.VICIRQ\>"
+syn match prog8BuiltInVar "\<c64\.IREQMASK\>"
+syn match prog8BuiltInVar "\<c64\.SPBGPR\>"
+syn match prog8BuiltInVar "\<c64\.SPMC\>"
+syn match prog8BuiltInVar "\<c64\.XXPAND\>"
+syn match prog8BuiltInVar "\<c64\.SPSPCL\>"
+syn match prog8BuiltInVar "\<c64\.SPBGCL\>"
+syn match prog8BuiltInVar "\<c64\.EXTCOL\>"
+syn match prog8BuiltInVar "\<c64\.BGCOL0\>"
+syn match prog8BuiltInVar "\<c64\.BGCOL1\>"
+syn match prog8BuiltInVar "\<c64\.BGCOL2\>"
+syn match prog8BuiltInVar "\<c64\.BGCOL4\>"
+syn match prog8BuiltInVar "\<c64\.SPMC0\>"
+syn match prog8BuiltInVar "\<c64\.SPMC1\>"
+syn match prog8BuiltInVar "\<c64\.SP0COL\>"
+syn match prog8BuiltInVar "\<c64\.SP1COL\>"
+syn match prog8BuiltInVar "\<c64\.SP2COL\>"
+syn match prog8BuiltInVar "\<c64\.SP3COL\>"
+syn match prog8BuiltInVar "\<c64\.SP4COL\>"
+syn match prog8BuiltInVar "\<c64\.SP5COL\>"
+syn match prog8BuiltInVar "\<c64\.SP6COL\>"
+syn match prog8BuiltInVar "\<c64\.SP7COL\>"
+syn match prog8BuiltInVar "\<c64\.SPCOL\>"
+syn match prog8BuiltInVar "\<c64\.CIA1PRA\>"
+syn match prog8BuiltInVar "\<c64\.CIA1PRB\>"
+syn match prog8BuiltInVar "\<c64\.CIA1DDRA\>"
+syn match prog8BuiltInVar "\<c64\.CIA1DDRB\>"
+syn match prog8BuiltInVar "\<c64\.CIA1TAL\>"
+syn match prog8BuiltInVar "\<c64\.CIA1TAH\>"
+syn match prog8BuiltInVar "\<c64\.CIA1TBL\>"
+syn match prog8BuiltInVar "\<c64\.CIA1TBH\>"
+syn match prog8BuiltInVar "\<c64\.CIA1TOD10\>"
+syn match prog8BuiltInVar "\<c64\.CIA1TODHR\>"
+syn match prog8BuiltInVar "\<c64\.CIA1SDR\>"
+syn match prog8BuiltInVar "\<c64\.CIA1ICR\>"
+syn match prog8BuiltInVar "\<c64\.CIA1CRA\>"
+syn match prog8BuiltInVar "\<c64\.CIA1CRB\>"
+syn match prog8BuiltInVar "\<c64\.CIA2PRA\>"
+syn match prog8BuiltInVar "\<c64\.CIA2PRB\>"
+syn match prog8BuiltInVar "\<c64\.CIA2DDRA\>"
+syn match prog8BuiltInVar "\<c64\.CIA2DDRB\>"
+syn match prog8BuiltInVar "\<c64\.CIA2TAL\>"
+syn match prog8BuiltInVar "\<c64\.CIA2TAH\>"
+syn match prog8BuiltInVar "\<c64\.CIA2TBL\>"
+syn match prog8BuiltInVar "\<c64\.CIA2TBH\>"
+syn match prog8BuiltInVar "\<c64\.CIA2TOD10\>"
+syn match prog8BuiltInVar "\<c64\.CIA2TODHR\>"
+syn match prog8BuiltInVar "\<c64\.CIA2SDR\>"
+syn match prog8BuiltInVar "\<c64\.CIA2ICR\>"
+syn match prog8BuiltInVar "\<c64\.CIA2CRA\>"
+syn match prog8BuiltInVar "\<c64\.CIA2CRB\>"
+syn match prog8BuiltInVar "\<c64\.FREQLO1\>"
+syn match prog8BuiltInVar "\<c64\.FREQHI1\>"
+syn match prog8BuiltInVar "\<c64\.FREQ1\>"
+syn match prog8BuiltInVar "\<c64\.PWLO1\>"
+syn match prog8BuiltInVar "\<c64\.PWHI1\>"
+syn match prog8BuiltInVar "\<c64\.PW1\>"
+syn match prog8BuiltInVar "\<c64\.CR1\>"
+syn match prog8BuiltInVar "\<c64\.AD1\>"
+syn match prog8BuiltInVar "\<c64\.SR1\>"
+syn match prog8BuiltInVar "\<c64\.FREQLO2\>"
+syn match prog8BuiltInVar "\<c64\.FREQHI2\>"
+syn match prog8BuiltInVar "\<c64\.FREQ2\>"
+syn match prog8BuiltInVar "\<c64\.PWLO2\>"
+syn match prog8BuiltInVar "\<c64\.PWHI2\>"
+syn match prog8BuiltInVar "\<c64\.PW2\>"
+syn match prog8BuiltInVar "\<c64\.CR2\>"
+syn match prog8BuiltInVar "\<c64\.AD2\>"
+syn match prog8BuiltInVar "\<c64\.SR2\>"
+syn match prog8BuiltInVar "\<c64\.FREQLO3\>"
+syn match prog8BuiltInVar "\<c64\.FREQHI3\>"
+syn match prog8BuiltInVar "\<c64\.FREQ3\>"
+syn match prog8BuiltInVar "\<c64\.PWLO3\>"
+syn match prog8BuiltInVar "\<c64\.PWHI3\>"
+syn match prog8BuiltInVar "\<c64\.PW3\>"
+syn match prog8BuiltInVar "\<c64\.CR3\>"
+syn match prog8BuiltInVar "\<c64\.AD3\>"
+syn match prog8BuiltInVar "\<c64\.SR3\>"
+syn match prog8BuiltInVar "\<c64\.FCLO\>"
+syn match prog8BuiltInVar "\<c64\.FCHI\>"
+syn match prog8BuiltInVar "\<c64\.FC\>"
+syn match prog8BuiltInVar "\<c64\.RESFILT\>"
+syn match prog8BuiltInVar "\<c64\.MVOL\>"
+syn match prog8BuiltInVar "\<c64\.POTX\>"
+syn match prog8BuiltInVar "\<c64\.POTY\>"
+syn match prog8BuiltInVar "\<c64\.OSC3\>"
+syn match prog8BuiltInVar "\<c64\.ENV3\>"
+syn match prog8BuiltInFunc "\<c64\.STROUT\>"
+syn match prog8BuiltInFunc "\<c64\.CLEARSCR\>"
+syn match prog8BuiltInFunc "\<c64\.HOMECRSR\>"
+syn match prog8BuiltInFunc "\<c64\.IRQDFRT\>"
+syn match prog8BuiltInFunc "\<c64\.IRQDFEND\>"
+syn match prog8BuiltInFunc "\<c64\.CINT\>"
+syn match prog8BuiltInFunc "\<c64\.IOINIT\>"
+syn match prog8BuiltInFunc "\<c64\.RAMTAS\>"
+syn match prog8BuiltInFunc "\<c64\.RESTOR\>"
+syn match prog8BuiltInFunc "\<c64\.VECTOR\>"
+syn match prog8BuiltInFunc "\<c64\.SETMSG\>"
+syn match prog8BuiltInFunc "\<c64\.SECOND\>"
+syn match prog8BuiltInFunc "\<c64\.TKSA\>"
+syn match prog8BuiltInFunc "\<c64\.MEMTOP\>"
+syn match prog8BuiltInFunc "\<c64\.MEMBOT\>"
+syn match prog8BuiltInFunc "\<c64\.SCNKEY\>"
+syn match prog8BuiltInFunc "\<c64\.SETTMO\>"
+syn match prog8BuiltInFunc "\<c64\.ACPTR\>"
+syn match prog8BuiltInFunc "\<c64\.CIOUT\>"
+syn match prog8BuiltInFunc "\<c64\.UNTLK\>"
+syn match prog8BuiltInFunc "\<c64\.UNLSN\>"
+syn match prog8BuiltInFunc "\<c64\.LISTEN\>"
+syn match prog8BuiltInFunc "\<c64\.TALK\>"
+syn match prog8BuiltInFunc "\<c64\.READST\>"
+syn match prog8BuiltInFunc "\<c64\.SETLFS\>"
+syn match prog8BuiltInFunc "\<c64\.SETNAM\>"
+syn match prog8BuiltInFunc "\<c64\.OPEN\>"
+syn match prog8BuiltInFunc "\<c64\.CLOSE\>"
+syn match prog8BuiltInFunc "\<c64\.CHKIN\>"
+syn match prog8BuiltInFunc "\<c64\.CHKOUT\>"
+syn match prog8BuiltInFunc "\<c64\.CLRCHN\>"
+syn match prog8BuiltInFunc "\<c64\.CHRIN\>"
+syn match prog8BuiltInFunc "\<c64\.CHROUT\>"
+syn match prog8BuiltInFunc "\<c64\.LOAD\>"
+syn match prog8BuiltInFunc "\<c64\.SAVE\>"
+syn match prog8BuiltInFunc "\<c64\.SETTIM\>"
+syn match prog8BuiltInFunc "\<c64\.RDTIM\>"
+syn match prog8BuiltInFunc "\<c64\.STOP\>"
+syn match prog8BuiltInFunc "\<c64\.GETIN\>"
+syn match prog8BuiltInFunc "\<c64\.CLALL\>"
+syn match prog8BuiltInFunc "\<c64\.UDTIM\>"
+syn match prog8BuiltInFunc "\<c64\.SCREEN\>"
+syn match prog8BuiltInFunc "\<c64\.PLOT\>"
+syn match prog8BuiltInFunc "\<c64\.IOBASE\>"
+syn match prog8BuiltInFunc "\<c64\.STOP2\>"
+syn match prog8BuiltInFunc "\<c64\.RDTIM16\>"
+syn match prog8BuiltInFunc "\<c64\.init_system\>"
+syn match prog8BuiltInFunc "\<c64\.init_system_phase2\>"
+syn match prog8BuiltInFunc "\<c64\.disable_runstop_and_charsetswitch\>"
+syn match prog8BuiltInFunc "\<c64\.set_irq\>"
+syn match prog8BuiltInFunc "\<c64\.restore_irq\>"
+syn match prog8BuiltInFunc "\<c64\.set_rasterirq\>"
+syn match prog8BuiltInVar "\<sys\.target\>"
+syn match prog8BuiltInFunc "\<sys\.reset_system\>"
+syn match prog8BuiltInFunc "\<sys\.wait\>"
+syn match prog8BuiltInFunc "\<sys\.memcopy\>"
+syn match prog8BuiltInFunc "\<sys\.memset\>"
+syn match prog8BuiltInFunc "\<sys\.memsetw\>"
+syn match prog8BuiltInFunc "\<sys\.rsave\>"
+syn match prog8BuiltInFunc "\<sys\.rrestore\>"
+syn match prog8BuiltInFunc "\<sys\.read_flags\>"
+syn match prog8BuiltInFunc "\<sys\.clear_carry\>"
+syn match prog8BuiltInFunc "\<sys\.set_carry\>"
+syn match prog8BuiltInFunc "\<sys\.clear_irqd\>"
+syn match prog8BuiltInFunc "\<sys\.set_irqd\>"
+syn match prog8BuiltInFunc "\<sys\.exit\>"
+syn match prog8BuiltInFunc "\<sys\.progend\>"
+syn match prog8BuiltInVar "\<cx16\.r0\>"
+syn match prog8BuiltInVar "\<cx16\.r1\>"
+syn match prog8BuiltInVar "\<cx16\.r2\>"
+syn match prog8BuiltInVar "\<cx16\.r3\>"
+syn match prog8BuiltInVar "\<cx16\.r4\>"
+syn match prog8BuiltInVar "\<cx16\.r5\>"
+syn match prog8BuiltInVar "\<cx16\.r6\>"
+syn match prog8BuiltInVar "\<cx16\.r7\>"
+syn match prog8BuiltInVar "\<cx16\.r8\>"
+syn match prog8BuiltInVar "\<cx16\.r9\>"
+syn match prog8BuiltInVar "\<cx16\.r10\>"
+syn match prog8BuiltInVar "\<cx16\.r11\>"
+syn match prog8BuiltInVar "\<cx16\.r12\>"
+syn match prog8BuiltInVar "\<cx16\.r13\>"
+syn match prog8BuiltInVar "\<cx16\.r14\>"
+syn match prog8BuiltInVar "\<cx16\.r15\>"
+
+
+" c64/textio.p8
+syn match prog8BuiltInVar "\<txt\.DEFAULT_WIDTH\>"
+syn match prog8BuiltInVar "\<txt\.DEFAULT_HEIGHT\>"
+syn match prog8BuiltInFunc "\<txt\.clear_screen\>"
+syn match prog8BuiltInFunc "\<txt\.home\>"
+syn match prog8BuiltInFunc "\<txt\.nl\>"
+syn match prog8BuiltInFunc "\<txt\.spc\>"
+syn match prog8BuiltInFunc "\<txt\.column\>"
+syn match prog8BuiltInFunc "\<txt\.fill_screen\>"
+syn match prog8BuiltInFunc "\<txt\.clear_screenchars\>"
+syn match prog8BuiltInFunc "\<txt\.clear_screencolors\>"
+syn match prog8BuiltInFunc "\<txt\.color\>"
+syn match prog8BuiltInFunc "\<txt\.lowercase\>"
+syn match prog8BuiltInFunc "\<txt\.uppercase\>"
+syn match prog8BuiltInFunc "\<txt\.scroll_left\>"
+syn match prog8BuiltInFunc "\<txt\.scroll_right\>"
+syn match prog8BuiltInFunc "\<txt\.scroll_up\>"
+syn match prog8BuiltInFunc "\<txt\.scroll_down\>"
+syn match prog8BuiltInFunc "\<txt\.chrout\>"
+syn match prog8BuiltInFunc "\<txt\.print\>"
+syn match prog8BuiltInFunc "\<txt\.print_ub0\>"
+syn match prog8BuiltInFunc "\<txt\.print_ub\>"
+syn match prog8BuiltInFunc "\<txt\.print_b\>"
+syn match prog8BuiltInFunc "\<txt\.print_ubhex\>"
+syn match prog8BuiltInFunc "\<txt\.print_ubbin\>"
+syn match prog8BuiltInFunc "\<txt\.print_uwbin\>"
+syn match prog8BuiltInFunc "\<txt\.print_uwhex\>"
+syn match prog8BuiltInFunc "\<txt\.print_uw0\>"
+syn match prog8BuiltInFunc "\<txt\.print_uw\>"
+syn match prog8BuiltInFunc "\<txt\.print_w\>"
+syn match prog8BuiltInFunc "\<txt\.input_chars\>"
+syn match prog8BuiltInFunc "\<txt\.setchr\>"
+syn match prog8BuiltInFunc "\<txt\.getchr\>"
+syn match prog8BuiltInFunc "\<txt\.setclr\>"
+syn match prog8BuiltInFunc "\<txt\.getclr\>"
+syn match prog8BuiltInFunc "\<txt\.setcc\>"
+syn match prog8BuiltInFunc "\<txt\.plot\>"
+syn match prog8BuiltInFunc "\<txt\.width\>"
+syn match prog8BuiltInFunc "\<txt\.height\>"
+
+
+" cx16/floats.p8
+syn match prog8BuiltInVar "\<floats\.PI\>"
+syn match prog8BuiltInVar "\<floats\.TWOPI\>"
+syn match prog8BuiltInFunc "\<floats\.AYINT\>"
+syn match prog8BuiltInFunc "\<floats\.GIVAYF\>"
+syn match prog8BuiltInFunc "\<floats\.GETADR\>"
+syn match prog8BuiltInFunc "\<floats\.FADDH\>"
+syn match prog8BuiltInFunc "\<floats\.FSUB\>"
+syn match prog8BuiltInFunc "\<floats\.FSUBT\>"
+syn match prog8BuiltInFunc "\<floats\.FADD\>"
+syn match prog8BuiltInFunc "\<floats\.FADDT\>"
+syn match prog8BuiltInFunc "\<floats\.ZEROFC\>"
+syn match prog8BuiltInFunc "\<floats\.NORMAL\>"
+syn match prog8BuiltInFunc "\<floats\.LOG\>"
+syn match prog8BuiltInFunc "\<floats\.FMULT\>"
+syn match prog8BuiltInFunc "\<floats\.FMULTT\>"
+syn match prog8BuiltInFunc "\<floats\.CONUPK\>"
+syn match prog8BuiltInFunc "\<floats\.MUL10\>"
+syn match prog8BuiltInFunc "\<floats\.DIV10\>"
+syn match prog8BuiltInFunc "\<floats\.FDIV\>"
+syn match prog8BuiltInFunc "\<floats\.FDIVT\>"
+syn match prog8BuiltInFunc "\<floats\.MOVFM\>"
+syn match prog8BuiltInFunc "\<floats\.MOVMF\>"
+syn match prog8BuiltInFunc "\<floats\.MOVFA\>"
+syn match prog8BuiltInFunc "\<floats\.MOVAF\>"
+syn match prog8BuiltInFunc "\<floats\.MOVEF\>"
+syn match prog8BuiltInFunc "\<floats\.SIGN\>"
+syn match prog8BuiltInFunc "\<floats\.SGN\>"
+syn match prog8BuiltInFunc "\<floats\.FREADSA\>"
+syn match prog8BuiltInFunc "\<floats\.ABS\>"
+syn match prog8BuiltInFunc "\<floats\.FCOMP\>"
+syn match prog8BuiltInFunc "\<floats\.INT\>"
+syn match prog8BuiltInFunc "\<floats\.FINLOG\>"
+syn match prog8BuiltInFunc "\<floats\.FOUT\>"
+syn match prog8BuiltInFunc "\<floats\.SQR\>"
+syn match prog8BuiltInFunc "\<floats\.FPWRT\>"
+syn match prog8BuiltInFunc "\<floats\.NEGOP\>"
+syn match prog8BuiltInFunc "\<floats\.EXP\>"
+syn match prog8BuiltInFunc "\<floats\.RND2\>"
+syn match prog8BuiltInFunc "\<floats\.RND\>"
+syn match prog8BuiltInFunc "\<floats\.COS\>"
+syn match prog8BuiltInFunc "\<floats\.SIN\>"
+syn match prog8BuiltInFunc "\<floats\.TAN\>"
+syn match prog8BuiltInFunc "\<floats\.ATN\>"
+syn match prog8BuiltInFunc "\<floats\.GIVUAYFAY\>"
+syn match prog8BuiltInFunc "\<floats\.GIVAYFAY\>"
+syn match prog8BuiltInFunc "\<floats\.FTOSWRDAY\>"
+syn match prog8BuiltInFunc "\<floats\.GETADRAY\>"
+syn match prog8BuiltInFunc "\<floats\.FREADUY\>"
+syn match prog8BuiltInFunc "\<floats\.h\>"
+
+
+" cx16/gfx2.p8
+syn match prog8BuiltInVar "\<gfx2\.active_mode\>"
+syn match prog8BuiltInVar "\<gfx2\.width\>"
+syn match prog8BuiltInVar "\<gfx2\.height\>"
+syn match prog8BuiltInVar "\<gfx2\.bpp\>"
+syn match prog8BuiltInVar "\<gfx2\.monochrome_dont_stipple_flag\>"
+syn match prog8BuiltInFunc "\<gfx2\.screen_mode\>"
+syn match prog8BuiltInFunc "\<gfx2\.clear_screen\>"
+syn match prog8BuiltInFunc "\<gfx2\.monochrome_stipple\>"
+syn match prog8BuiltInFunc "\<gfx2\.rect\>"
+syn match prog8BuiltInFunc "\<gfx2\.fillrect\>"
+syn match prog8BuiltInFunc "\<gfx2\.horizontal_line\>"
+syn match prog8BuiltInFunc "\<gfx2\.vertical_line\>"
+syn match prog8BuiltInFunc "\<gfx2\.line\>"
+syn match prog8BuiltInFunc "\<gfx2\.circle\>"
+syn match prog8BuiltInFunc "\<gfx2\.disc\>"
+syn match prog8BuiltInFunc "\<gfx2\.plot\>"
+syn match prog8BuiltInFunc "\<gfx2\.position\>"
+syn match prog8BuiltInFunc "\<gfx2\.next_pixel\>"
+syn match prog8BuiltInFunc "\<gfx2\.next_pixels\>"
+syn match prog8BuiltInFunc "\<gfx2\.set_8_pixels_from_bits\>"
+syn match prog8BuiltInVar "\<gfx2\.charset_orig_bank\>"
+syn match prog8BuiltInVar "\<gfx2\.charset_orig_addr\>"
+syn match prog8BuiltInVar "\<gfx2\.charset_bank\>"
+syn match prog8BuiltInVar "\<gfx2\.charset_addr\>"
+syn match prog8BuiltInFunc "\<gfx2\.text_charset\>"
+syn match prog8BuiltInFunc "\<gfx2\.text\>"
+syn match prog8BuiltInFunc "\<gfx2\.cs_innerloop640\>"
+syn match prog8BuiltInFunc "\<gfx2\.addr_mul_24_for_highres_4c\>"
+syn match prog8BuiltInFunc "\<gfx2\.addr_mul_24_for_lores_256c\>"
+
+
+" cx16/graphics.p8
+syn match prog8BuiltInVar "\<graphics\.WIDTH\>"
+syn match prog8BuiltInVar "\<graphics\.HEIGHT\>"
+syn match prog8BuiltInFunc "\<graphics\.enable_bitmap_mode\>"
+syn match prog8BuiltInFunc "\<graphics\.disable_bitmap_mode\>"
+syn match prog8BuiltInFunc "\<graphics\.clear_screen\>"
+syn match prog8BuiltInFunc "\<graphics\.line\>"
+syn match prog8BuiltInFunc "\<graphics\.fillrect\>"
+syn match prog8BuiltInFunc "\<graphics\.rect\>"
+syn match prog8BuiltInFunc "\<graphics\.horizontal_line\>"
+syn match prog8BuiltInFunc "\<graphics\.vertical_line\>"
+syn match prog8BuiltInFunc "\<graphics\.circle\>"
+syn match prog8BuiltInFunc "\<graphics\.disc\>"
+syn match prog8BuiltInFunc "\<graphics\.plot\>"
+
+
+" cx16/palette.p8
+syn match prog8BuiltInVar "\<palette\.vera_palette_ptr\>"
+syn match prog8BuiltInVar "\<palette\.c\>"
+syn match prog8BuiltInFunc "\<palette\.set_color\>"
+syn match prog8BuiltInFunc "\<palette\.set_rgb4\>"
+syn match prog8BuiltInFunc "\<palette\.set_rgb\>"
+syn match prog8BuiltInFunc "\<palette\.set_rgb8\>"
+syn match prog8BuiltInFunc "\<palette\.set_monochrome\>"
+syn match prog8BuiltInFunc "\<palette\.set_grayscale\>"
+syn match prog8BuiltInVar "\<palette\.C64_colorpalette_dark\>"
+syn match prog8BuiltInVar "\<palette\.C64_colorpalette_pepto\>"
+syn match prog8BuiltInVar "\<palette\.C64_colorpalette_light\>"
+syn match prog8BuiltInFunc "\<palette\.set_c64pepto\>"
+syn match prog8BuiltInFunc "\<palette\.set_c64light\>"
+syn match prog8BuiltInFunc "\<palette\.set_c64dark\>"
+
+" cx16/syslib.p8
+syn match prog8BuiltInFunc "\<c64\.CINT\>"
+syn match prog8BuiltInFunc "\<c64\.IOINIT\>"
+syn match prog8BuiltInFunc "\<c64\.RAMTAS\>"
+syn match prog8BuiltInFunc "\<c64\.RESTOR\>"
+syn match prog8BuiltInFunc "\<c64\.VECTOR\>"
+syn match prog8BuiltInFunc "\<c64\.SETMSG\>"
+syn match prog8BuiltInFunc "\<c64\.SECOND\>"
+syn match prog8BuiltInFunc "\<c64\.TKSA\>"
+syn match prog8BuiltInFunc "\<c64\.MEMTOP\>"
+syn match prog8BuiltInFunc "\<c64\.MEMBOT\>"
+syn match prog8BuiltInFunc "\<c64\.SCNKEY\>"
+syn match prog8BuiltInFunc "\<c64\.SETTMO\>"
+syn match prog8BuiltInFunc "\<c64\.ACPTR\>"
+syn match prog8BuiltInFunc "\<c64\.CIOUT\>"
+syn match prog8BuiltInFunc "\<c64\.UNTLK\>"
+syn match prog8BuiltInFunc "\<c64\.UNLSN\>"
+syn match prog8BuiltInFunc "\<c64\.LISTEN\>"
+syn match prog8BuiltInFunc "\<c64\.TALK\>"
+syn match prog8BuiltInFunc "\<c64\.READST\>"
+syn match prog8BuiltInFunc "\<c64\.SETLFS\>"
+syn match prog8BuiltInFunc "\<c64\.SETNAM\>"
+syn match prog8BuiltInFunc "\<c64\.OPEN\>"
+syn match prog8BuiltInFunc "\<c64\.CLOSE\>"
+syn match prog8BuiltInFunc "\<c64\.CHKIN\>"
+syn match prog8BuiltInFunc "\<c64\.CHKOUT\>"
+syn match prog8BuiltInFunc "\<c64\.CLRCHN\>"
+syn match prog8BuiltInFunc "\<c64\.CHRIN\>"
+syn match prog8BuiltInFunc "\<c64\.CHROUT\>"
+syn match prog8BuiltInFunc "\<c64\.LOAD\>"
+syn match prog8BuiltInFunc "\<c64\.SAVE\>"
+syn match prog8BuiltInFunc "\<c64\.SETTIM\>"
+syn match prog8BuiltInFunc "\<c64\.RDTIM\>"
+syn match prog8BuiltInFunc "\<c64\.STOP\>"
+syn match prog8BuiltInFunc "\<c64\.GETIN\>"
+syn match prog8BuiltInFunc "\<c64\.CLALL\>"
+syn match prog8BuiltInFunc "\<c64\.UDTIM\>"
+syn match prog8BuiltInFunc "\<c64\.SCREEN\>"
+syn match prog8BuiltInFunc "\<c64\.PLOT\>"
+syn match prog8BuiltInFunc "\<c64\.IOBASE\>"
+syn match prog8BuiltInFunc "\<c64\.STOP2\>"
+syn match prog8BuiltInFunc "\<c64\.RDTIM16\>"
+syn match prog8BuiltInFunc "\<c64\.MEMTOP2\>"
+syn match prog8BuiltInVar "\<cx16\.CINV\>"
+syn match prog8BuiltInVar "\<cx16\.NMI_VEC\>"
+syn match prog8BuiltInVar "\<cx16\.RESET_VEC\>"
+syn match prog8BuiltInVar "\<cx16\.IRQ_VEC\>"
+syn match prog8BuiltInVar "\<cx16\.r0\>"
+syn match prog8BuiltInVar "\<cx16\.r1\>"
+syn match prog8BuiltInVar "\<cx16\.r2\>"
+syn match prog8BuiltInVar "\<cx16\.r3\>"
+syn match prog8BuiltInVar "\<cx16\.r4\>"
+syn match prog8BuiltInVar "\<cx16\.r5\>"
+syn match prog8BuiltInVar "\<cx16\.r6\>"
+syn match prog8BuiltInVar "\<cx16\.r7\>"
+syn match prog8BuiltInVar "\<cx16\.r8\>"
+syn match prog8BuiltInVar "\<cx16\.r9\>"
+syn match prog8BuiltInVar "\<cx16\.r10\>"
+syn match prog8BuiltInVar "\<cx16\.r11\>"
+syn match prog8BuiltInVar "\<cx16\.r12\>"
+syn match prog8BuiltInVar "\<cx16\.r13\>"
+syn match prog8BuiltInVar "\<cx16\.r14\>"
+syn match prog8BuiltInVar "\<cx16\.r15\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_BASE\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_ADDR_L\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_ADDR_M\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_ADDR_H\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_DATA0\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_DATA1\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_CTRL\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_IEN\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_ISR\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_IRQ_LINE_L\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_DC_VIDEO\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_DC_HSCALE\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_DC_VSCALE\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_DC_BORDER\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_DC_HSTART\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_DC_HSTOP\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_DC_VSTART\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_DC_VSTOP\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L0_CONFIG\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L0_MAPBASE\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L0_TILEBASE\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L0_HSCROLL_L\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L0_HSCROLL_H\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L0_VSCROLL_L\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L0_VSCROLL_H\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L1_CONFIG\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L1_MAPBASE\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L1_TILEBASE\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L1_HSCROLL_L\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L1_HSCROLL_H\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L1_VSCROLL_L\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_L1_VSCROLL_H\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_AUDIO_CTRL\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_AUDIO_RATE\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_AUDIO_DATA\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_SPI_DATA\>"
+syn match prog8BuiltInVar "\<cx16\.VERA_SPI_CTRL\>"
+syn match prog8BuiltInVar "\<cx16\.via1\>"
+syn match prog8BuiltInVar "\<cx16\.d1prb\>"
+syn match prog8BuiltInVar "\<cx16\.d1pra\>"
+syn match prog8BuiltInVar "\<cx16\.d1ddrb\>"
+syn match prog8BuiltInVar "\<cx16\.d1ddra\>"
+syn match prog8BuiltInVar "\<cx16\.d1t1l\>"
+syn match prog8BuiltInVar "\<cx16\.d1t1h\>"
+syn match prog8BuiltInVar "\<cx16\.d1t1ll\>"
+syn match prog8BuiltInVar "\<cx16\.d1t1lh\>"
+syn match prog8BuiltInVar "\<cx16\.d1t2l\>"
+syn match prog8BuiltInVar "\<cx16\.d1t2h\>"
+syn match prog8BuiltInVar "\<cx16\.d1sr\>"
+syn match prog8BuiltInVar "\<cx16\.d1acr\>"
+syn match prog8BuiltInVar "\<cx16\.d1pcr\>"
+syn match prog8BuiltInVar "\<cx16\.d1ifr\>"
+syn match prog8BuiltInVar "\<cx16\.d1ier\>"
+syn match prog8BuiltInVar "\<cx16\.d1ora\>"
+syn match prog8BuiltInVar "\<cx16\.via2\>"
+syn match prog8BuiltInVar "\<cx16\.d2prb\>"
+syn match prog8BuiltInVar "\<cx16\.d2pra\>"
+syn match prog8BuiltInVar "\<cx16\.d2ddrb\>"
+syn match prog8BuiltInVar "\<cx16\.d2ddra\>"
+syn match prog8BuiltInVar "\<cx16\.d2t1l\>"
+syn match prog8BuiltInVar "\<cx16\.d2t1h\>"
+syn match prog8BuiltInVar "\<cx16\.d2t1ll\>"
+syn match prog8BuiltInVar "\<cx16\.d2t1lh\>"
+syn match prog8BuiltInVar "\<cx16\.d2t2l\>"
+syn match prog8BuiltInVar "\<cx16\.d2t2h\>"
+syn match prog8BuiltInVar "\<cx16\.d2sr\>"
+syn match prog8BuiltInVar "\<cx16\.d2acr\>"
+syn match prog8BuiltInVar "\<cx16\.d2pcr\>"
+syn match prog8BuiltInVar "\<cx16\.d2ifr\>"
+syn match prog8BuiltInVar "\<cx16\.d2ier\>"
+syn match prog8BuiltInVar "\<cx16\.d2ora\>"
+syn match prog8BuiltInFunc "\<cx16\.close_all\>"
+syn match prog8BuiltInFunc "\<cx16\.lkupla\>"
+syn match prog8BuiltInFunc "\<cx16\.lkupsa\>"
+syn match prog8BuiltInFunc "\<cx16\.screen_set_mode\>"
+syn match prog8BuiltInFunc "\<cx16\.screen_set_charset\>"
+syn match prog8BuiltInFunc "\<cx16\.pfkey\>"
+syn match prog8BuiltInFunc "\<cx16\.jsrfar\>"
+syn match prog8BuiltInFunc "\<cx16\.fetch\>"
+syn match prog8BuiltInFunc "\<cx16\.stash\>"
+syn match prog8BuiltInFunc "\<cx16\.cmpare\>"
+syn match prog8BuiltInFunc "\<cx16\.primm\>"
+syn match prog8BuiltInFunc "\<cx16\.macptr\>"
+syn match prog8BuiltInFunc "\<cx16\.enter_basic\>"
+syn match prog8BuiltInFunc "\<cx16\.mouse_config\>"
+syn match prog8BuiltInFunc "\<cx16\.mouse_get\>"
+syn match prog8BuiltInFunc "\<cx16\.mouse_scan\>"
+syn match prog8BuiltInFunc "\<cx16\.joystick_scan\>"
+syn match prog8BuiltInFunc "\<cx16\.joystick_get\>"
+syn match prog8BuiltInFunc "\<cx16\.clock_set_date_time\>"
+syn match prog8BuiltInFunc "\<cx16\.clock_get_date_time\>"
+syn match prog8BuiltInFunc "\<cx16\.GRAPH_init\>"
+syn match prog8BuiltInFunc "\<cx16\.GRAPH_clear\>"
+syn match prog8BuiltInFunc "\<cx16\.GRAPH_set_window\>"
+syn match prog8BuiltInFunc "\<cx16\.GRAPH_set_colors\>"
+syn match prog8BuiltInFunc "\<cx16\.GRAPH_draw_line\>"
+syn match prog8BuiltInFunc "\<cx16\.GRAPH_draw_rect\>"
+syn match prog8BuiltInFunc "\<cx16\.GRAPH_move_rect\>"
+syn match prog8BuiltInFunc "\<cx16\.GRAPH_draw_oval\>"
+syn match prog8BuiltInFunc "\<cx16\.GRAPH_draw_image\>"
+syn match prog8BuiltInFunc "\<cx16\.GRAPH_set_font\>"
+syn match prog8BuiltInFunc "\<cx16\.GRAPH_get_char_size\>"
+syn match prog8BuiltInFunc "\<cx16\.GRAPH_put_char\>"
+syn match prog8BuiltInFunc "\<cx16\.GRAPH_put_next_char\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_init\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_get_info\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_set_palette\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_cursor_position\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_cursor_position2\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_cursor_next_line\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_get_pixel\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_get_pixels\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_set_pixel\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_set_pixels\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_set_8_pixels\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_set_8_pixels_opaque\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_fill_pixels\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_filter_pixels\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_move_pixels\>"
+syn match prog8BuiltInFunc "\<cx16\.sprite_set_image\>"
+syn match prog8BuiltInFunc "\<cx16\.sprite_set_position\>"
+syn match prog8BuiltInFunc "\<cx16\.memory_fill\>"
+syn match prog8BuiltInFunc "\<cx16\.memory_copy\>"
+syn match prog8BuiltInFunc "\<cx16\.memory_crc\>"
+syn match prog8BuiltInFunc "\<cx16\.memory_decompress\>"
+syn match prog8BuiltInFunc "\<cx16\.console_init\>"
+syn match prog8BuiltInFunc "\<cx16\.console_put_char\>"
+syn match prog8BuiltInFunc "\<cx16\.console_get_char\>"
+syn match prog8BuiltInFunc "\<cx16\.console_put_image\>"
+syn match prog8BuiltInFunc "\<cx16\.console_set_paging_message\>"
+syn match prog8BuiltInFunc "\<cx16\.kbdbuf_put\>"
+syn match prog8BuiltInFunc "\<cx16\.entropy_get\>"
+syn match prog8BuiltInFunc "\<cx16\.monitor\>"
+syn match prog8BuiltInFunc "\<cx16\.rombank\>"
+syn match prog8BuiltInFunc "\<cx16\.rambank\>"
+syn match prog8BuiltInFunc "\<cx16\.vpeek\>"
+syn match prog8BuiltInFunc "\<cx16\.vaddr\>"
+syn match prog8BuiltInFunc "\<cx16\.vpoke\>"
+syn match prog8BuiltInFunc "\<cx16\.vpoke_or\>"
+syn match prog8BuiltInFunc "\<cx16\.vpoke_and\>"
+syn match prog8BuiltInFunc "\<cx16\.vpoke_xor\>"
+syn match prog8BuiltInFunc "\<cx16\.vload\>"
+syn match prog8BuiltInFunc "\<cx16\.FB_set_pixels_from_buf\>"
+syn match prog8BuiltInFunc "\<cx16\.init_system\>"
+syn match prog8BuiltInFunc "\<cx16\.init_system_phase2\>"
+syn match prog8BuiltInFunc "\<cx16\.set_irq\>"
+syn match prog8BuiltInFunc "\<cx16\.restore_irq\>"
+syn match prog8BuiltInFunc "\<cx16\.set_rasterirq\>"
+syn match prog8BuiltInFunc "\<cx16\.set_rasterline\>"
+syn match prog8BuiltInFunc "\<sys\.reset_system\>"
+syn match prog8BuiltInFunc "\<sys\.wait\>"
+syn match prog8BuiltInFunc "\<sys\.memcopy\>"
+syn match prog8BuiltInFunc "\<sys\.memset\>"
+syn match prog8BuiltInFunc "\<sys\.memsetw\>"
+syn match prog8BuiltInFunc "\<sys\.rsave\>"
+syn match prog8BuiltInFunc "\<sys\.rrestore\>"
+syn match prog8BuiltInFunc "\<sys\.read_flags\>"
+syn match prog8BuiltInFunc "\<sys\.clear_carry\>"
+syn match prog8BuiltInFunc "\<sys\.set_carry\>"
+syn match prog8BuiltInFunc "\<sys\.clear_irqd\>"
+syn match prog8BuiltInFunc "\<sys\.set_irqd\>"
+syn match prog8BuiltInFunc "\<sys\.exit\>"
+syn match prog8BuiltInFunc "\<sys\.progend\>"
+
+
+" cx16/textio.p8
+syn match prog8BuiltInVar "\<txt\.DEFAULT_WIDTH\>"
+syn match prog8BuiltInVar "\<txt\.DEFAULT_HEIGHT\>"
+syn match prog8BuiltInFunc "\<txt\.clear_screen\>"
+syn match prog8BuiltInFunc "\<txt\.home\>"
+syn match prog8BuiltInFunc "\<txt\.nl\>"
+syn match prog8BuiltInFunc "\<txt\.spc\>"
+syn match prog8BuiltInFunc "\<txt\.column\>"
+syn match prog8BuiltInFunc "\<txt\.fill_screen\>"
+syn match prog8BuiltInFunc "\<txt\.clear_screenchars\>"
+syn match prog8BuiltInFunc "\<txt\.clear_screencolors\>"
+syn match prog8BuiltInVar "\<txt\.color_to_charcode\>"
+syn match prog8BuiltInFunc "\<txt\.color\>"
+syn match prog8BuiltInFunc "\<txt\.color2\>"
+syn match prog8BuiltInFunc "\<txt\.lowercase\>"
+syn match prog8BuiltInFunc "\<txt\.uppercase\>"
+syn match prog8BuiltInFunc "\<txt\.scroll_left\>"
+syn match prog8BuiltInFunc "\<txt\.scroll_right\>"
+syn match prog8BuiltInFunc "\<txt\.scroll_up\>"
+syn match prog8BuiltInFunc "\<txt\.scroll_down\>"
+syn match prog8BuiltInFunc "\<txt\.chrout\>"
+syn match prog8BuiltInFunc "\<txt\.print\>"
+syn match prog8BuiltInFunc "\<txt\.print_ub0\>"
+syn match prog8BuiltInFunc "\<txt\.print_ub\>"
+syn match prog8BuiltInFunc "\<txt\.print_b\>"
+syn match prog8BuiltInFunc "\<txt\.print_ubhex\>"
+syn match prog8BuiltInFunc "\<txt\.print_ubbin\>"
+syn match prog8BuiltInFunc "\<txt\.print_uwbin\>"
+syn match prog8BuiltInFunc "\<txt\.print_uwhex\>"
+syn match prog8BuiltInFunc "\<txt\.print_uw0\>"
+syn match prog8BuiltInFunc "\<txt\.print_uw\>"
+syn match prog8BuiltInFunc "\<txt\.print_w\>"
+syn match prog8BuiltInFunc "\<txt\.input_chars\>"
+syn match prog8BuiltInFunc "\<txt\.setchr\>"
+syn match prog8BuiltInFunc "\<txt\.getchr\>"
+syn match prog8BuiltInFunc "\<txt\.setclr\>"
+syn match prog8BuiltInFunc "\<txt\.getclr\>"
+syn match prog8BuiltInFunc "\<txt\.setcc\>"
+syn match prog8BuiltInFunc "\<txt\.setcc2\>"
+syn match prog8BuiltInFunc "\<txt\.plot\>"
+syn match prog8BuiltInFunc "\<txt\.width\>"
+syn match prog8BuiltInFunc "\<txt\.height\>"
+
+
+" conv.p8
+syn match prog8BuiltInFunc "\<conv\.str_ub0\>"
+syn match prog8BuiltInFunc "\<conv\.str_ub\>"
+syn match prog8BuiltInFunc "\<conv\.str_b\>"
+syn match prog8BuiltInFunc "\<conv\.str_ubhex\>"
+syn match prog8BuiltInFunc "\<conv\.str_ubbin\>"
+syn match prog8BuiltInFunc "\<conv\.str_uwbin\>"
+syn match prog8BuiltInFunc "\<conv\.str_uwhex\>"
+syn match prog8BuiltInFunc "\<conv\.str_uw\>"
+syn match prog8BuiltInFunc "\<conv\.str_w\>"
+syn match prog8BuiltInFunc "\<conv\.any2uword\>"
+syn match prog8BuiltInFunc "\<conv\.str2ubyte\>"
+syn match prog8BuiltInFunc "\<conv\.str2byte\>"
+syn match prog8BuiltInFunc "\<conv\.str2uword\>"
+syn match prog8BuiltInFunc "\<conv\.str2word\>"
+syn match prog8BuiltInFunc "\<conv\.hex2uword\>"
+syn match prog8BuiltInFunc "\<conv\.bin2uword\>"
+syn match prog8BuiltInFunc "\<conv\.ubyte2decimal\>"
+syn match prog8BuiltInFunc "\<conv\.uword2decimal\>"
+syn match prog8BuiltInFunc "\<conv\.byte2decimal\>"
+syn match prog8BuiltInFunc "\<conv\.ubyte2hex\>"
+syn match prog8BuiltInFunc "\<conv\.uword2hex\>"
+
+
+" cx16logo.p8
+syn match prog8BuiltInFunc "\<cx16logo\.logo_at\>"
+syn match prog8BuiltInFunc "\<cx16logo\.logo\>"
+syn match prog8BuiltInVar "\<cx16logo\.logo_lines\>"
+
+
+" diskio.p8
+syn match prog8BuiltInFunc "\<diskio\.directory\>"
+syn match prog8BuiltInFunc "\<diskio\.list_files\>"
+syn match prog8BuiltInFunc "\<diskio\.lf_start_list\>"
+syn match prog8BuiltInFunc "\<diskio\.lf_next_entry\>"
+syn match prog8BuiltInFunc "\<diskio\.lf_end_list\>"
+syn match prog8BuiltInFunc "\<diskio\.f_open\>"
+syn match prog8BuiltInFunc "\<diskio\.f_read\>"
+syn match prog8BuiltInFunc "\<diskio\.f_read_all\>"
+syn match prog8BuiltInFunc "\<diskio\.f_readline\>"
+syn match prog8BuiltInFunc "\<diskio\.f_close\>"
+syn match prog8BuiltInFunc "\<diskio\.status\>"
+syn match prog8BuiltInFunc "\<diskio\.save\>"
+syn match prog8BuiltInFunc "\<diskio\.load\>"
+syn match prog8BuiltInFunc "\<diskio\.delete\>"
+syn match prog8BuiltInFunc "\<diskio\.rename\>"
+
+
+" prog8_lib.p8
+syn match prog8BuiltInFunc "\<prog8_lib\.pattern_match\>"
+
+
+" string.p8
+syn match prog8BuiltInFunc "\<string\.length\>"
+syn match prog8BuiltInFunc "\<string\.left\>"
+syn match prog8BuiltInFunc "\<string\.right\>"
+syn match prog8BuiltInFunc "\<string\.slice\>"
+syn match prog8BuiltInFunc "\<string\.find\>"
+syn match prog8BuiltInFunc "\<string\.copy\>"
+syn match prog8BuiltInFunc "\<string\.compare\>"
+syn match prog8BuiltInFunc "\<string\.lower\>"
+syn match prog8BuiltInFunc "\<string\.upper\>"
+
+
+" test_stack.p8
+syn match prog8BuiltInFunc "\<test_stack\.test\>"
+
+
+hi def link prog8BuiltInVar Identifier
+hi def link prog8BuiltInFunc Function
diff --git a/syntax-files/Vim/readme.txt b/syntax-files/Vim/readme.txt
index 419d61f55..f405a3e18 100644
--- a/syntax-files/Vim/readme.txt
+++ b/syntax-files/Vim/readme.txt
@@ -3,7 +3,9 @@ Created by Elektron72 on github
 
 
 To install:
-    Copy prog8.vim into ~/.vim/syntax/
+    Copy prog8.vim and prog8_builtins.vim into ~/.vim/syntax/. If you will never
+    use highlighting for built-in functions and variables, you do not need to
+    copy prog8_builtins.vim.
 
 To enable:
     Type:
@@ -12,3 +14,9 @@ To enable:
     like to enable syntax highlighting for all .p8 files, add the following line
     to your .vimrc:
         au BufRead,BufNewFile *.p8 setfiletype prog8
+
+    If you would like to disable highlighting for built-in functions and
+    variables without deleting or renaming the file, add the following line to
+    your .vimrc:
+        let g:prog8_no_highlight_builtins = 1
+    (The value doesn't actually matter, only that the variable is defined.)