diff --git a/doc/notes.txt b/doc/notes.txt
index 06f006a4..f9cb8572 100644
--- a/doc/notes.txt
+++ b/doc/notes.txt
@@ -40,14 +40,15 @@ TODO:
 - update bootstrap to 4.0
 - batariBasic: proper line numbers, debugging
 - granular control over time scrubbing, show CPU state
-- compiler flags for final ROM build
-- workermain: split build functions, better msg types
 - builds:
+  - compiler flags for final ROM build
+  - workermain: split build functions, better msg types
   - what if >1 file with same name? (local/nonlocal/directory)
   - what if .c and .s names collide?
   - maybe put stuff in examples/ dir?
   - error msg when #link doesn't work
   - warning when ROM too big
+  - detect "libcv.h" and include library automagically?
 - sdcc:
   - can't link asm files before c files (e.g. acheader.s must be last)
   - figure out area names ordering
diff --git a/index.html b/index.html
index 4999f46c..d3d5136e 100644
--- a/index.html
+++ b/index.html
@@ -107,7 +107,7 @@ if (window.location.host.endsWith('8bitworkshop.com')) {
       <li class="dropdown dropdown-submenu">
         <a tabindex="-1" href="#">Tools</a>
         <ul class="dropdown-menu">
-          <li><a class="dropdown-item" target="_8bws_tools" href="./tools/fontgen/">Bitmap Font Generator</a></li>
+          <li><a class="dropdown-item" target="_8bws_tools" href="//8bitworkshop.com/bitmapfontgenerator/">Bitmap Font Generator</a></li>
           <li><a class="dropdown-item" target="_8bws_tools" href="http://tomeko.net/online_tools/file_to_hex.php?lang=en">Binary File to Hex Converter</a></li>
           <li class="dropdown dropdown-submenu">
              <a tabindex="-1" href="#">Atari 2600/VCS</a>
diff --git a/presets/coleco/climber.c b/presets/coleco/climber.c
index 12d0cc80..06d6365c 100644
--- a/presets/coleco/climber.c
+++ b/presets/coleco/climber.c
@@ -6,6 +6,8 @@
 
 #include "common.h"
 //#link "common.c"
+
+// for SMS
 //#link "fonts.s"
 
 #define XOFS 12 // sprite horiz. offset
diff --git a/presets/coleco/common.c b/presets/coleco/common.c
index d1af692f..5c82fb4e 100644
--- a/presets/coleco/common.c
+++ b/presets/coleco/common.c
@@ -34,17 +34,17 @@ word getimageaddr(byte x, byte y) {
   return IMAGE + y*COLS + x;
 }
 
-byte getchar(byte x, byte y) {
+byte getcharxy(byte x, byte y) {
   return cvu_vinb(getimageaddr(x,y));
 }
 
-void putchar(byte x, byte y, byte attr) {
+void putcharxy(byte x, byte y, byte attr) {
   cvu_voutb(attr, getimageaddr(x,y));
 }
 
-void putstring(byte x, byte y, const char* string) {
+void putstringxy(byte x, byte y, const char* string) {
   while (*string) {
-    putchar(x++, y, CHAR(*string++));
+    putcharxy(x++, y, CHAR(*string++));
   }
 }
 
@@ -73,7 +73,7 @@ void draw_bcd_word(byte x, byte y, word bcd) {
   byte j;
   x += 3;
   for (j=0; j<4; j++) {
-    putchar(x, y, CHAR('0'+(bcd&0xf)));
+    putcharxy(x, y, CHAR('0'+(bcd&0xf)));
     x--;
     bcd >>= 4;
   }
@@ -123,3 +123,13 @@ void set_shifted_pattern(const byte* src, word dest, byte shift) {
     dest++;
   }
 }
+
+void copy_default_character_set() {
+#ifdef CV_MSX
+  static byte __at(0xf91f) CGPNT;
+  static byte* __at(0xf920) CGADDR;
+  cvu_memtovmemcpy(PATTERN, CGADDR, 256*8);
+#else
+  cvu_memtovmemcpy(PATTERN, (void *)(font_bitmap_0 - '0'*8), 256*8);
+#endif
+}
diff --git a/presets/coleco/common.h b/presets/coleco/common.h
index 1f244640..01ace8ba 100644
--- a/presets/coleco/common.h
+++ b/presets/coleco/common.h
@@ -16,17 +16,24 @@
 #define SPRITE_PATTERNS ((const cv_vmemp)0x3800)
 #define SPRITES		((const cv_vmemp)0x3c00)
 
+#ifndef COLS
 #define COLS 32
+#endif
+
+#ifndef ROWS
 #define ROWS 24
+#endif
 
 typedef unsigned char byte;
 typedef signed char sbyte;
 typedef unsigned short word;
 
-#ifndef CV_SMS
+#ifdef CV_CV
 uintptr_t __at(0x6a) font_bitmap_a;
 uintptr_t __at(0x6c) font_bitmap_0;
-#else
+#endif
+
+#ifdef CV_SMS
 extern char font_bitmap_a[];
 extern char font_bitmap_0[];
 #endif
@@ -34,8 +41,9 @@ extern char font_bitmap_0[];
 #define COLOR_FGBG(fg,bg) (((fg)<<4)|(bg))
 #define COLOR_FG(fg) (((fg)<<4))
 
-#define LOCHAR 0x20
-#define HICHAR 0xff
+#ifndef LOCHAR
+#define LOCHAR 0x0
+#endif
 
 #define CHAR(ch) (ch-LOCHAR)
 
@@ -53,9 +61,9 @@ extern char cursor_y;
 extern void clrscr();
 
 extern word getimageaddr(byte x, byte y);
-extern byte getchar(byte x, byte y);
-extern void putchar(byte x, byte y, byte attr);
-extern void putstring(byte x, byte y, const char* string);
+extern byte getcharxy(byte x, byte y);
+extern void putcharxy(byte x, byte y, byte attr);
+extern void putstringxy(byte x, byte y, const char* string);
 extern void delay(byte i);
 extern byte rndint(byte a, byte b);
 
@@ -69,4 +77,6 @@ extern word bcd_add(word a, word b);
 extern void vdp_setup();
 extern void set_shifted_pattern(const byte* src, word dest, byte shift);
 
+extern void copy_default_character_set();
+
 #endif
diff --git a/presets/coleco/hello.c b/presets/coleco/hello.c
index 20b5dfba..8e89fa17 100644
--- a/presets/coleco/hello.c
+++ b/presets/coleco/hello.c
@@ -5,18 +5,15 @@
 #include <cv.h>
 #include <cvu.h>
 
-#define IMAGE ((const cv_vmemp)0x1c00)
-
 #define COLS 40
-#define ROWS 24
 
-uintptr_t __at(0x6a) font_bitmap_a;
-uintptr_t __at(0x6c) font_bitmap_0;
+#include "common.h"
+//#link "common.c"
 
 void setup_40_column_font() {
   cv_set_image_table(IMAGE);
-  cvu_memtovmemcpy(0x1800, (void *)(font_bitmap_0 - 0x30*8), 2048);
-  cv_set_character_pattern_t(0x1800);
+  copy_default_character_set();
+  cv_set_character_pattern_t(PATTERN);
   cv_set_screen_mode(CV_SCREENMODE_TEXT);
 }
 
diff --git a/presets/coleco/lines.c b/presets/coleco/lines.c
index 5a38e5f8..f5e8950a 100644
--- a/presets/coleco/lines.c
+++ b/presets/coleco/lines.c
@@ -5,16 +5,7 @@
 #include <cv.h>
 #include <cvu.h>
 
-#define PATTERN ((const cv_vmemp)0x0)
-#define COLOR ((const cv_vmemp)0x2000)
-#define IMAGE ((const cv_vmemp)0x1800)
-
-#define COLS 32
-#define ROWS 24
-
-typedef unsigned char byte;
-typedef signed char sbyte;
-typedef unsigned short word;
+#include "common.h"
 
 void setup_mode2() {
   cvu_vmemset(0, 0, 0x4000);
diff --git a/presets/coleco/mode2bitmap.c b/presets/coleco/mode2bitmap.c
index a2d13fe1..18a5aa3b 100644
--- a/presets/coleco/mode2bitmap.c
+++ b/presets/coleco/mode2bitmap.c
@@ -1,14 +1,11 @@
-
+
 
 #include <stdlib.h>
 
 #include <cv.h>
 #include <cvu.h>
 
-#define PATTERN	0x0000	// $0000 - $17ff
-#define IMAGE	0x1800	// $1800 - $1aff
-#define SPRITES	0x1b00	// not used
-#define COLOR	0x2000	// $2000 - $37ff
+#include "common.h"
 
 /* link in MODE 2 bitmap data */
 
diff --git a/presets/coleco/mode2compressed.c b/presets/coleco/mode2compressed.c
index 6b6ac23f..32e2c249 100644
--- a/presets/coleco/mode2compressed.c
+++ b/presets/coleco/mode2compressed.c
@@ -5,10 +5,7 @@
 #include <cv.h>
 #include <cvu.h>
 
-#define PATTERN	0x0000	// $0000 - $17ff
-#define IMAGE	0x1800	// $1800 - $1aff
-#define SPRITES	0x1b00	// not used
-#define COLOR	0x2000	// $2000 - $37ff
+#include "common.h"
 
 /* link in MODE 2 bitmap data */
 
diff --git a/presets/coleco/multicolor.c b/presets/coleco/multicolor.c
index 640a80fb..8bf6a176 100644
--- a/presets/coleco/multicolor.c
+++ b/presets/coleco/multicolor.c
@@ -1,17 +1,12 @@
-
+/*
+64x48 multicolor mode
+*/
+
 #include <stdlib.h>
 #include <cv.h>
 #include <cvu.h>
 
-#define PATTERN ((const cv_vmemp)0x0000)
-#define IMAGE ((const cv_vmemp)0x1800)
-
-#define COLS 64
-#define ROWS 48
-
-typedef unsigned char byte;
-typedef signed char sbyte;
-typedef unsigned short word;
+#include "common.h"
 
 void multicolor_fullscreen_image_table(word ofs) {
   byte x,y;
diff --git a/presets/coleco/shoot.c b/presets/coleco/shoot.c
index 62237793..1ab3fa10 100644
--- a/presets/coleco/shoot.c
+++ b/presets/coleco/shoot.c
@@ -1,4 +1,4 @@
-
+
 #include <stdlib.h>
 #include <string.h>
 #include <cv.h>
@@ -10,9 +10,8 @@
 #include "stars.h"
 //#link "stars.c"
 
-#ifdef CV_SMS
+// for SMS
 //#link "fonts.s"
-#endif
 
 #define NSPRITES 16
 #define NMISSILES 8
@@ -178,8 +177,8 @@ void copy_sprites() {
 
 void add_score(word bcd) {
   player_score = bcd_add(player_score, bcd);
-  draw_bcd_word(0, 1, player_score);
-  putchar(4, 1, CHAR('0'));
+  draw_bcd_word(0, 0, player_score);
+  putcharxy(4, 0, CHAR('0'));
 }
 
 void clrobjs() {
@@ -593,7 +592,7 @@ void play_round() {
   byte end_timer = 255;
   player_score = 0;
   add_score(0);
-  putstring(0, 0, "PLAYER 1");
+  //putstringxy(0, 0, "PLAYER 1");
   setup_formation();
   clrobjs();
   formation_direction = 1;
@@ -640,7 +639,7 @@ PATTERN TABLE:
 
 void setup_graphics() {
   byte i;
-  cvu_memtovmemcpy(PATTERN, (void *)(font_bitmap_0 - 16*8), 96*8);
+  copy_default_character_set();
   cvu_memtovmemcpy(SPRITE_PATTERNS, sprite_table, sizeof(sprite_table));
   cvu_vmemset(COLOR, COLOR_SCORE<<4, 8); // set color for chars 0-63
   cvu_vmemset(COLOR+8, COLOR_FORMATION<<4, 32-8); // set chars 63-255
diff --git a/presets/coleco/siegegame.c b/presets/coleco/siegegame.c
index 7627ed47..97f40b57 100644
--- a/presets/coleco/siegegame.c
+++ b/presets/coleco/siegegame.c
@@ -7,9 +7,8 @@
 #include "common.h"
 //#link "common.c"
 
-#ifdef CV_SMS
+// for SMS
 //#link "fonts.s"
-#endif
 
 ////////// GAME DATA
 
@@ -41,26 +40,26 @@ const char BOX_CHARS[8] = {
 
 void draw_box(byte x, byte y, byte x2, byte y2, const char* chars) {
   byte x1 = x;
-  putchar(x, y, chars[2]);
-  putchar(x2, y, chars[3]);
-  putchar(x, y2, chars[0]);
-  putchar(x2, y2, chars[1]);
+  putcharxy(x, y, chars[2]);
+  putcharxy(x2, y, chars[3]);
+  putcharxy(x, y2, chars[0]);
+  putcharxy(x2, y2, chars[1]);
   while (++x < x2) {
-    putchar(x, y, chars[5]);
-    putchar(x, y2, chars[4]);
+    putcharxy(x, y, chars[5]);
+    putcharxy(x, y2, chars[4]);
   }
   while (++y < y2) {
-    putchar(x1, y, chars[6]);
-    putchar(x2, y, chars[7]);
+    putcharxy(x1, y, chars[6]);
+    putcharxy(x2, y, chars[7]);
   }
 }
 
 void draw_playfield() {
   draw_box(0,1,COLS-1,ROWS-1,BOX_CHARS);
-  putstring(0,0,"Plyr1:");
-  putstring(20,0,"Plyr2:");
-  putchar(7,0,CHAR(players[0].score+'0'));
-  putchar(27,0,CHAR(players[1].score+'0'));
+  putstringxy(0,0,"Plyr1:");
+  putstringxy(20,0,"Plyr2:");
+  putcharxy(7,0,CHAR(players[0].score+'0'));
+  putcharxy(27,0,CHAR(players[1].score+'0'));
 }
 
 typedef enum { D_RIGHT, D_DOWN, D_LEFT, D_UP } dir_t;
@@ -86,14 +85,14 @@ void reset_players() {
 }
 
 void draw_player(Player* p) {
-  putchar(p->x, p->y, p->head_attr);
+  putcharxy(p->x, p->y, p->head_attr);
 }
 
 void move_player(Player* p) {
-  putchar(p->x, p->y, p->tail_attr);
+  putcharxy(p->x, p->y, p->tail_attr);
   p->x += DIR_X[p->dir];
   p->y += DIR_Y[p->dir];
-  if (getchar(p->x, p->y) != CHAR(' '))
+  if (getcharxy(p->x, p->y) != CHAR(' '))
     p->collided = 1;
   draw_player(p);
 }
@@ -118,7 +117,7 @@ byte ai_try_dir(Player* p, dir_t dir, byte shift) {
   dir &= 3;
   x = p->x + (DIR_X[dir] << shift);
   y = p->y + (DIR_Y[dir] << shift);
-  if (x < 29 && y < 27 && getchar(x, y) == CHAR(' ')) {
+  if (x < 29 && y < 27 && getcharxy(x, y) == CHAR(' ')) {
     p->dir = dir;
     return 1;
   } else {
@@ -179,9 +178,9 @@ void declare_winner(byte winner) {
     draw_box(i,i,COLS-1-i,ROWS-1-i,BOX_CHARS);
     delay(1);
   }
-  putstring(12,10,"WINNER:");
-  putstring(12,13,"PLAYER ");
-  putchar(12+7, 13, CHAR('1')+winner);
+  putstringxy(12,10,"WINNER:");
+  putstringxy(12,13,"PLAYER ");
+  putcharxy(12+7, 13, CHAR('1')+winner);
   delay(75);
   gameover = 1;
 }
@@ -219,8 +218,8 @@ void play_game() {
 }
 
 void setup_32_column_font() {
+  copy_default_character_set();
   cv_set_colors(0, CV_COLOR_BLUE);
-  cvu_memtovmemcpy(PATTERN, (void *)(font_bitmap_0 - 16*8), 96*8);
   cvu_vmemset(COLOR, COLOR_FG(CV_COLOR_YELLOW), 8); // set color for chars 0-63
   cvu_vmemset(COLOR+8, COLOR_FG(CV_COLOR_WHITE), 32-8); // set chars 63-255
 }
diff --git a/presets/coleco/stars.c b/presets/coleco/stars.c
index bdf9d150..23662d40 100644
--- a/presets/coleco/stars.c
+++ b/presets/coleco/stars.c
@@ -18,9 +18,11 @@ byte starfield_get_tile_xy(byte x, byte y) {
 }
 
 void starfield_setup() {
+  // clear star patterns
+  cvu_vmemset(PATTERN+starfield_base_char*8, 0, 16*8);
   for (byte x=0; x<32; x++) {
     for (byte y=0; y<28; y++) {
-      putchar(x, y, starfield_get_tile_xy(x, y));
+      putcharxy(x, y, starfield_get_tile_xy(x, y));
     }
     cvu_voutb(COLOR_FG(CV_COLOR_WHITE),
               COLOR+((starfield_base_char+x)>>3));
diff --git a/presets/coleco/text.c b/presets/coleco/text.c
index 9651a1cf..1c24aec4 100644
--- a/presets/coleco/text.c
+++ b/presets/coleco/text.c
@@ -2,18 +2,15 @@
 #include <cv.h>
 #include <cvu.h>
 
-#define PATTERN 0x0000
-#define IMAGE   0x0800
-
-uintptr_t __at(0x6a) font_bitmap_a;
-uintptr_t __at(0x6c) font_bitmap_0;
+#include "common.h"
+//#link "common.c"
 
 void setup_text_mode() {
   cv_set_screen_mode(CV_SCREENMODE_TEXT);
   cv_set_image_table(IMAGE);
   cv_set_character_pattern_t(PATTERN);
   cvu_vmemset(0, 0, 0x4000);
-  cvu_memtovmemcpy(PATTERN, (void *)(font_bitmap_0 - '0'*8), 256*8);
+  copy_default_character_set();
 }
 
 void show_text() {
diff --git a/presets/coleco/text32.c b/presets/coleco/text32.c
index 06a0b753..85a79cf7 100644
--- a/presets/coleco/text32.c
+++ b/presets/coleco/text32.c
@@ -2,14 +2,8 @@
 #include <cv.h>
 #include <cvu.h>
 
-#define PATTERN		0x0000	// 256*8 = 2048 bytes
-#define IMAGE		0x0800	// 32*24 = 768 bytes
-#define COLOR		0x0b00	// 32 bytes
-#define SPRITE_PATTERNS 0x3800	// 32*32 = 1024 bytes
-#define SPRITES		0x3c00	// 4*32 = 128 bytes
-
-uintptr_t __at(0x6a) font_bitmap_a;
-uintptr_t __at(0x6c) font_bitmap_0;
+#include "common.h"
+//#link "common.c"
 
 void setup_32_column_font() {
   cv_set_screen_mode(CV_SCREENMODE_STANDARD);
@@ -19,7 +13,7 @@ void setup_32_column_font() {
   cv_set_sprite_pattern_table(SPRITE_PATTERNS);
   cv_set_sprite_attribute_table(SPRITES);
   cvu_vmemset(0, 0, 0x4000);
-  cvu_memtovmemcpy(PATTERN, (void *)(font_bitmap_0 - '0'*8), 2048);
+  copy_default_character_set();
   cvu_vmemset(COLOR, 0x36, 8); // set color for chars 0-63
   cvu_vmemset(COLOR+8, 0x06, 32-8); // set chars 63-255
 }
@@ -35,6 +29,6 @@ void main() {
   setup_32_column_font();
   show_text();
   while (1) {
-    cvu_vmemset(COLOR, i++, 8); // set color for chars 0-63
+    cvu_vmemset(COLOR+8, i++, 4); // set color for chars 64-95
   }
 }
diff --git a/src/platform/msx.ts b/src/platform/msx.ts
index ed19dbe5..f205c6bb 100644
--- a/src/platform/msx.ts
+++ b/src/platform/msx.ts
@@ -13,13 +13,31 @@ import { TMS9918A } from "../video/tms9918a";
 // https://www.msx.org/wiki/Slots
 // https://www.msx.org/wiki/SDCC
 
-var MSX_PRESETS = [
+var MSX_BIOS_PRESETS = [
   {id:'helloworld.asm', name:'Hello World (ASM)'},
   {id:'redbook_kbd.asm', name:'Redbook Keyboard Scanner (ASM)'},
   {id:'siegegame.c',    name:'Siege Game'},
   {id:'eliza.c',        name:'Eliza'},
 ];
 
+// TODO: share with coleco, sms
+var LIBCV_PRESETS = [
+  { id: 'text.c', name: 'Text Mode' },
+  { id: 'hello.c', name: 'Scrolling Text' },
+  { id: 'text32.c', name: '32-Column Color Text' },
+  { id: 'stars.c', name: 'Scrolling Starfield' },
+  { id: 'cursorsmooth.c', name: 'Moving Cursor' },
+  { id: 'simplemusic.c', name: 'Simple Music' },
+  { id: 'musicplayer.c', name: 'Multivoice Music' },
+  { id: 'mode2bitmap.c', name: 'Mode 2 Bitmap' },
+  { id: 'mode2compressed.c', name: 'Mode 2 Bitmap (LZG)' },
+  { id: 'lines.c', name: 'Mode 2 Lines' },
+  { id: 'multicolor.c', name: 'Multicolor Mode' },
+  { id: 'siegegame.c', name: 'Siege Game' },
+  { id: 'shoot.c', name: 'Solarian Game' },
+  { id: 'climber.c', name: 'Platform Game' },
+];
+
 var MSX_KEYCODE_MAP = makeKeycodeMap([
   [Keys.UP,       0, 0x1],
   [Keys.DOWN,     0, 0x2],
@@ -78,7 +96,7 @@ class MSXPlatform extends BasicZ80ScanlinePlatform implements Platform {
   slotmask : number = 0;
   ppi_c : number = 0;
   
-  getPresets() { return MSX_PRESETS; }
+  getPresets() { return MSX_BIOS_PRESETS; }
 
   getKeyboardMap() { return MSX_KEYCODE_MAP; }
 
@@ -276,8 +294,12 @@ class MSXPlatform extends BasicZ80ScanlinePlatform implements Platform {
 
 ///
 
+class MSXLibCVPlatform extends MSXPlatform implements Platform {
+  getPresets() { return LIBCV_PRESETS; }
+}
+
 PLATFORMS['msx'] = MSXPlatform;
-PLATFORMS['msx-libcv'] = MSXPlatform;
+PLATFORMS['msx-libcv'] = MSXLibCVPlatform;
 
 ///
 
diff --git a/src/worker/workermain.ts b/src/worker/workermain.ts
index 44530c08..cd10a11a 100644
--- a/src/worker/workermain.ts
+++ b/src/worker/workermain.ts
@@ -323,7 +323,6 @@ var PLATFORM_PARAMS = {
   },
 };
 
-PLATFORM_PARAMS['coleco.mame'] = PLATFORM_PARAMS['coleco'];
 PLATFORM_PARAMS['sms-sms-libcv'] = PLATFORM_PARAMS['sms-sg1000-libcv'];
 
 var _t1;
diff --git a/test/cli/testworker.js b/test/cli/testworker.js
index 40a947e7..659061f1 100644
--- a/test/cli/testworker.js
+++ b/test/cli/testworker.js
@@ -78,7 +78,7 @@ function doBuild(msgs, callback, outlen, nlines, nerrors, options) {
 
 describe('Worker', function() {
   it('should assemble DASM', function(done) {
-    compile('dasm', '\tprocessor 6502\n\torg $f000\nfoo lda #0\n', 'vcs', done, 2, 1);
+    compile('dasm', '\tprocessor 6502\n\torg $f000\nfoo lda #0\n', 'vcs.mame', done, 2, 1);
   });
   it('should NOT assemble DASM', function(done) {
     compile('dasm', '\tprocessor 6502\n\torg $f000 ; this is a comment\nfoo asl a\n', 'vcs', done, 0, 0, 1);
@@ -98,7 +98,7 @@ describe('Worker', function() {
   });
   */
   it('should compile CC65', function(done) {
-    compile('cc65', 'int main() {\nint x=1;\nreturn x+2;\n}', 'nes', done, 40976, 3);
+    compile('cc65', 'int main() {\nint x=1;\nreturn x+2;\n}', 'nes.mame', done, 40976, 3);
   });
   it('should NOT compile CC65 (compile error)', function(done) {
     compile('cc65', 'int main() {\nint x=1;\nprintf("%d",x);\nreturn x+2;\n}', 'nes', done, 0, 0, 1);