diff --git a/presets/mw8080bw/game2.c b/presets/mw8080bw/game2.c
new file mode 100644
index 00000000..6e18bbdb
--- /dev/null
+++ b/presets/mw8080bw/game2.c
@@ -0,0 +1,327 @@
+
+#include <string.h>
+
+typedef unsigned char byte;
+typedef unsigned char word;
+
+__sfr __at (0x0) input0;
+__sfr __at (0x1) input1;
+__sfr __at (0x2) input2;
+__sfr __at (0x2) bitshift_offset;
+__sfr __at (0x3) bitshift_read;
+__sfr __at (0x4) bitshift_value;
+__sfr __at (0x6) watchdog_strobe;
+byte __at (0x2400) vidmem[0x1c00]; // 256x224x1 video memory
+
+#define FIRE1 (input1 & 0x10)
+#define LEFT1 (input1 & 0x20)
+#define RIGHT1 (input1 & 0x40)
+
+void main();
+void scanline96() __interrupt;
+void scanline224();
+
+// start routine @ 0x0
+// set stack pointer, enable interrupts
+void start() {
+__asm
+	LD      SP,#0x2400
+        EI
+        NOP
+__endasm;
+	main();
+}
+
+// scanline 96 interrupt @ 0x8
+// we don't have enough bytes to make this an interrupt
+// because the next routine is at 0x10
+void _RST_8()  {
+__asm
+	NOP
+        NOP
+        NOP
+        NOP
+        NOP
+__endasm;
+	scanline96();
+}
+
+// scanline 224 interrupt @ 0x10
+// this one, we make an interrupt so it saves regs.
+void RST_10() __interrupt {
+	scanline224();
+}
+
+// scanline 96 function, saves regs
+void scanline96() __interrupt {
+}
+
+// scanline 224 function, regs already saved
+void scanline224() {
+}
+
+/// GRAPHICS FUNCTIONS
+
+void draw_vline(byte x, byte y1, byte y2) {
+  byte yb1 = y1/8;
+  byte yb2 = y2/8;
+  byte* dest = &vidmem[x*32+yb1];
+  signed char nbytes = yb2 - yb1;
+  *dest++ ^= 0xff << (y1&7);
+  if (nbytes > 0) {
+    while (--nbytes > 0) {
+      *dest++ ^= 0xff;
+    }
+    *dest ^= 0xff >> (~y2&7);
+  } else {
+    *--dest ^= 0xff << ((y2+1)&7);
+  }
+}
+
+#define LOCHAR 0x20
+#define HICHAR 0x5e
+
+const byte font8x8[HICHAR-LOCHAR+1][8] = {
+{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, { 0x00,0x00,0x00,0x79,0x79,0x00,0x00,0x00 }, { 0x00,0x70,0x70,0x00,0x00,0x70,0x70,0x00 }, { 0x14,0x7f,0x7f,0x14,0x14,0x7f,0x7f,0x14 }, { 0x00,0x12,0x3a,0x6b,0x6b,0x2e,0x24,0x00 }, { 0x00,0x63,0x66,0x0c,0x18,0x33,0x63,0x00 }, { 0x00,0x26,0x7f,0x59,0x59,0x77,0x27,0x05 }, { 0x00,0x00,0x00,0x10,0x30,0x60,0x40,0x00 }, { 0x00,0x00,0x1c,0x3e,0x63,0x41,0x00,0x00 }, { 0x00,0x00,0x41,0x63,0x3e,0x1c,0x00,0x00 }, { 0x08,0x2a,0x3e,0x1c,0x1c,0x3e,0x2a,0x08 }, { 0x00,0x08,0x08,0x3e,0x3e,0x08,0x08,0x00 }, { 0x00,0x00,0x00,0x03,0x03,0x00,0x00,0x00 }, { 0x00,0x08,0x08,0x08,0x08,0x08,0x08,0x00 }, { 0x00,0x00,0x00,0x03,0x03,0x00,0x00,0x00 }, { 0x00,0x01,0x03,0x06,0x0c,0x18,0x30,0x20 }, { 0x00,0x3e,0x7f,0x49,0x51,0x7f,0x3e,0x00 }, { 0x00,0x01,0x11,0x7f,0x7f,0x01,0x01,0x00 }, { 0x00,0x23,0x67,0x45,0x49,0x79,0x31,0x00 }, { 0x00,0x22,0x63,0x49,0x49,0x7f,0x36,0x00 }, { 0x00,0x0c,0x0c,0x14,0x34,0x7f,0x7f,0x04 }, { 0x00,0x72,0x73,0x51,0x51,0x5f,0x4e,0x00 }, { 0x00,0x3e,0x7f,0x49,0x49,0x6f,0x26,0x00 }, { 0x00,0x60,0x60,0x4f,0x5f,0x70,0x60,0x00 }, { 0x00,0x36,0x7f,0x49,0x49,0x7f,0x36,0x00 }, { 0x00,0x32,0x7b,0x49,0x49,0x7f,0x3e,0x00 }, { 0x00,0x00,0x00,0x12,0x12,0x00,0x00,0x00 }, { 0x00,0x00,0x00,0x13,0x13,0x00,0x00,0x00 }, { 0x00,0x08,0x1c,0x36,0x63,0x41,0x41,0x00 }, { 0x00,0x14,0x14,0x14,0x14,0x14,0x14,0x00 }, { 0x00,0x41,0x41,0x63,0x36,0x1c,0x08,0x00 }, { 0x00,0x20,0x60,0x45,0x4d,0x78,0x30,0x00 }, { 0x00,0x3e,0x7f,0x41,0x59,0x79,0x3a,0x00 }, { 0x00,0x1f,0x3f,0x68,0x68,0x3f,0x1f,0x00 }, { 0x00,0x7f,0x7f,0x49,0x49,0x7f,0x36,0x00 }, { 0x00,0x3e,0x7f,0x41,0x41,0x63,0x22,0x00 }, { 0x00,0x7f,0x7f,0x41,0x63,0x3e,0x1c,0x00 }, { 0x00,0x7f,0x7f,0x49,0x49,0x41,0x41,0x00 }, { 0x00,0x7f,0x7f,0x48,0x48,0x40,0x40,0x00 }, { 0x00,0x3e,0x7f,0x41,0x49,0x6f,0x2e,0x00 }, { 0x00,0x7f,0x7f,0x08,0x08,0x7f,0x7f,0x00 }, { 0x00,0x00,0x41,0x7f,0x7f,0x41,0x00,0x00 }, { 0x00,0x02,0x03,0x41,0x7f,0x7e,0x40,0x00 }, { 0x00,0x7f,0x7f,0x1c,0x36,0x63,0x41,0x00 }, { 0x00,0x7f,0x7f,0x01,0x01,0x01,0x01,0x00 }, { 0x00,0x7f,0x7f,0x30,0x18,0x30,0x7f,0x7f }, { 0x00,0x7f,0x7f,0x38,0x1c,0x7f,0x7f,0x00 }, { 0x00,0x3e,0x7f,0x41,0x41,0x7f,0x3e,0x00 }, { 0x00,0x7f,0x7f,0x48,0x48,0x78,0x30,0x00 }, { 0x00,0x3c,0x7e,0x42,0x43,0x7f,0x3d,0x00 }, { 0x00,0x7f,0x7f,0x4c,0x4e,0x7b,0x31,0x00 }, { 0x00,0x32,0x7b,0x49,0x49,0x6f,0x26,0x00 }, { 0x00,0x40,0x40,0x7f,0x7f,0x40,0x40,0x00 }, { 0x00,0x7e,0x7f,0x01,0x01,0x7f,0x7e,0x00 }, { 0x00,0x7c,0x7e,0x03,0x03,0x7e,0x7c,0x00 }, { 0x00,0x7f,0x7f,0x06,0x0c,0x06,0x7f,0x7f }, { 0x00,0x63,0x77,0x1c,0x1c,0x77,0x63,0x00 }, { 0x00,0x70,0x78,0x0f,0x0f,0x78,0x70,0x00 }, { 0x00,0x43,0x47,0x4d,0x59,0x71,0x61,0x00 }, { 0x00,0x00,0x7f,0x7f,0x41,0x41,0x00,0x00 }, { 0x00,0x20,0x30,0x18,0x0c,0x06,0x03,0x01 }, { 0x00,0x00,0x41,0x41,0x7f,0x7f,0x00,0x00 }, { 0x00,0x08,0x18,0x3f,0x3f,0x18,0x08,0x00 }
+};
+
+const byte bitmap1[] =
+{6,63,0x00,0x00,0x00,0x00,0x18,0x00,0x00,0x00,0x00,0x00,0x7e,0x00,0x00,0x00,0x00,0x80,0x63,0x00,0x00,0x00,0x00,0xc0,0xc0,0x00,0x00,0x00,0x00,0x5e,0x80,0x00,0x00,0x00,0x00,0x73,0x80,0x00,0x00,0x00,0x00,0xe3,0x83,0x00,0x00,0x00,0x00,0xe3,0x9f,0x00,0x00,0x00,0x00,0xc2,0xbf,0x00,0x00,0x00,0xc0,0x03,0xff,0x00,0x00,0x00,0x70,0x06,0xfe,0x01,0x00,0x00,0x18,0x0c,0x00,0x03,0x00,0x00,0x0c,0x18,0x00,0x02,0x00,0x00,0x02,0x30,0x00,0x02,0x00,0x00,0x0f,0xe0,0x00,0x03,0x00,0xc0,0x10,0x80,0xef,0x01,0x00,0x40,0x27,0x00,0x38,0x00,0x00,0xa0,0x47,0x00,0x60,0x00,0x00,0xe0,0x4f,0xf8,0x60,0x00,0x00,0xe0,0x4f,0x0c,0xe1,0x00,0x00,0xe0,0x4f,0x06,0xe2,0x01,0x00,0xe0,0x4f,0xf2,0xe2,0x03,0xfc,0xe0,0x4f,0xfb,0xe4,0x03,0xfe,0xff,0x4f,0xf9,0xe4,0x0f,0xff,0x87,0x27,0xf9,0xe5,0x0f,0xff,0x07,0x36,0xf9,0xe5,0x1f,0xff,0x07,0x18,0xf9,0xe4,0x3f,0xff,0x07,0x00,0xfa,0xe4,0x7f,0xfe,0x07,0x00,0x72,0xe2,0x7f,0xfc,0x03,0x00,0x06,0xe2,0x7f,0xdc,0x00,0x02,0xb8,0xe1,0xff,0x08,0x00,0x04,0x60,0xe0,0xff,0x30,0x00,0x1c,0x00,0xe0,0xff,0x60,0x80,0x03,0x00,0xc0,0x7f,0xc0,0xff,0x01,0x00,0x80,0x7f,0x00,0x00,0x01,0x00,0x80,0x3f,0x00,0x00,0x01,0x00,0x00,0x0e,0x00,0x00,0x01,0x00,0x00,0x02,0x00,0x00,0x01,0x00,0x00,0x02,0x00,0x00,0x01,0x00,0x00,0x02,0x00,0x80,0x01,0x00,0x01,0x02,0x00,0x80,0x00,0x00,0x09,0x02,0x00,0xc0,0x00,0x00,0x09,0x02,0x00,0xc0,0x00,0x00,0x09,0x02,0x00,0xc0,0x00,0x00,0x09,0x02,0x00,0xc0,0x00,0x80,0x08,0x02,0x00,0xc0,0x00,0x80,0x04,0x03,0x00,0xa0,0x00,0x80,0x04,0x03,0x00,0xa0,0x01,0x40,0x04,0x01,0x00,0x20,0x02,0x70,0x82,0x01,0x00,0x70,0xf4,0x1f,0x83,0x00,0x00,0x98,0x1d,0xf8,0xc0,0x00,0x00,0x88,0x0f,0x00,0x60,0x00,0x00,0x88,0x08,0x07,0x38,0x00,0x80,0x8f,0x08,0x3f,0x0e,0x00,0x80,0x98,0x08,0xe1,0x03,0x00,0x80,0x80,0x07,0x01,0x00,0x00,0x80,0xc1,0x0c,0x01,0x00,0x00,0x00,0x83,0x90,0x01,0x00,0x00,0x00,0xfe,0x81,0x00,0x00,0x00,0x00,0x00,0x86,0x00,0x00,0x00,0x00,0x00,0xd8,0x00,0x00,0x00,0x00,0x00,0x60,0x00,0x00,0x00}
+;
+const byte player_bitmap[] =
+{2,27,0,0,0,0,0x0f,0x00,0x3e,0x00,0xf4,0x07,0xec,0x00,0x76,0x00,0x2b,0x00,0x33,0x00,0x75,0x00,0xf5,0x00,0xeb,0x31,0xbf,0xef,0x3f,0xcf,0xbf,0xef,0xeb,0x31,0xf5,0x00,0x75,0x00,0x33,0x00,0x2b,0x00,0x76,0x00,0xec,0x00,0xf4,0x07,0x3e,0x00,0x0f,0x00,0x00,0x00,0,0}
+;
+const byte bullet_bitmap2[] =
+{4,2,0,0x88,0x88,0,0,0x44,0x44,0,}
+;
+const byte bullet_bitmap[] =
+{2,2,0x88,0x88,0x44,0x44}
+;
+const byte enemy1_bitmap[] =
+{2,24,0x0f,0x00,0x3e,0x00,0xf4,0x07,0xec,0x00,0x76,0x00,0x2b,0x00,0x33,0x00,0x75,0x00,0xf5,0x00,0xeb,0x31,0xbf,0xef,0x3f,0xcf,0xbf,0xef,0xeb,0x31,0xf5,0x00,0x75,0x00,0x33,0x00,0x2b,0x00,0x76,0x00,0xec,0x00,0xf4,0x07,0x3e,0x00,0x0f,0x00,0x00,0x00,0,0}
+;
+
+void draw_sprite(const byte* src, byte x, byte y) {
+  byte i,j;
+  byte* dest = &vidmem[y+x*32];
+  byte w = *src++;
+  byte h = *src++;
+  for (j=0; j<h; j++) {
+    for (i=0; i<w; i++) {
+      *dest++ = *src++;
+    }
+    dest += 32-w;
+  }
+}
+
+byte xor_sprite(const byte* src, byte x, byte y) {
+  byte i,j;
+  byte result = 0;
+  byte* dest = &vidmem[y+x*32];
+  byte w = *src++;
+  byte h = *src++;
+  for (j=0; j<h; j++) {
+    for (i=0; i<w; i++) {
+      result |= (*dest++ ^= *src++);
+    }
+    dest += 32-w;
+  }
+  return result;
+}
+
+void erase_sprite(const byte* src, byte x, byte y) {
+  byte i,j;
+  byte* dest = &vidmem[y+x*32];
+  byte w = *src++;
+  byte h = *src++;
+  for (j=0; j<h; j++) {
+    for (i=0; i<w; i++) {
+      *dest++ = 0;
+    }
+    dest += 32-w;
+  }
+}
+
+void draw_char(char ch, byte x, byte y) {
+  byte i;
+  byte* dest = &vidmem[y+x*32*8];
+  const byte* src = &font8x8[(ch-LOCHAR)][0];
+  for (i=0; i<8; i++) {
+    //dest[i*32] ^= src[i];
+    *dest ^= *src;
+    dest += 32;
+    src += 1;
+  }
+}
+
+void draw_string(const char* str, byte x, byte y) {
+  do {
+    byte ch = *str++;
+    if (!ch) break;
+    draw_char(ch, x, y);
+    x++;
+  } while (1);
+}
+
+byte player_x;
+byte bullet_x;
+byte bullet_y;
+
+#define MAX_ENTITIES 28
+
+typedef struct {
+  byte x,y;
+  const byte* shape; // need const here
+} Entity;
+
+Entity entities[MAX_ENTITIES];
+byte entity_index;
+byte num_entities;
+
+typedef struct {
+  byte right:1;
+  byte down:1;
+} MarchMode;
+
+MarchMode this_mode, next_mode;
+
+void init_entities() {
+  int i,x,y;
+  x=0;
+  y=26;
+  for (i=0; i<MAX_ENTITIES; i++) {
+    Entity* e = &entities[i];
+    e->x = x;
+    e->y = y;
+    e->shape = enemy1_bitmap;
+    x += 28;
+    if (x > 180) {
+      x = 0;
+      y -= 3;
+    }
+  }
+  num_entities = MAX_ENTITIES;
+  this_mode.right = 1;
+  this_mode.down = 0;
+  next_mode.right = 1;
+  next_mode.down = 0;
+}
+
+void delete_entity(Entity* e) {
+  erase_sprite(e->shape, e->x, e->y);
+  memmove(e, e+1, sizeof(Entity)*(entities-e+MAX_ENTITIES-1));
+  num_entities--; // update_next_entity() will check entity_index
+}
+
+void update_next_entity() {
+  Entity* e;
+  if (entity_index >= num_entities) {
+    entity_index = 0;
+    memcpy(&this_mode, &next_mode, sizeof(this_mode));
+  }
+  e = &entities[entity_index];
+  erase_sprite(e->shape, e->x, e->y);
+  if (this_mode.down) {
+    e->y--;
+    next_mode.down = 0;
+  } else {
+    if (this_mode.right) {
+      e->x += 2;
+      if (e->x >= 200) {
+        next_mode.down = 1;
+        next_mode.right = 0;
+      }
+    } else {
+      e->x -= 2;
+      if (e->x == 0) {
+        next_mode.down = 1;
+        next_mode.right = 1;
+      }
+    }
+  }
+  draw_sprite(e->shape, e->x, e->y);
+  entity_index++;
+}
+
+void draw_bunker(byte x, byte y, byte y2, byte h, byte w) {
+  byte i;
+  for (i=0; i<h; i++) {
+    draw_vline(x+i, y+i, y+y2+i*2);
+    draw_vline(x+h*2+w-i-1, y+i, y+y2+i*2);
+  }
+  for (i=0; i<w; i++) {
+    draw_vline(x+h+i, y+h, y+y2+h*2);
+  }
+}
+
+char in_rect(Entity* e, byte x, byte y) {
+  byte h = e->shape[0];
+  byte w = e->shape[1];
+  return (x >= e->x && x <= e->x+w && y >= e->y && y <= e->y+h);
+}
+
+Entity* find_entity_at(byte x, byte y) {
+  byte i;
+  for (i=0; i<num_entities; i++) {
+    Entity* e = &entities[i];
+    if (in_rect(e, x, y)) {
+      return e;
+    }
+  }
+  return NULL;
+}
+
+void check_bullet_hit(byte x, byte y) {
+  Entity* e = find_entity_at(x,y);
+  if (e) { 
+    delete_entity(e);
+  }
+}
+
+void gameloop() {
+  watchdog_strobe = 0b0111 / 14;
+  //draw_char('S',0,50);
+  //draw_string("HELLO WORLD", 6, 16);
+  draw_bunker(30, 40, 15, 15, 20);
+  draw_bunker(120, 40, 15, 15, 20);
+  draw_sprite(enemy1_bitmap, 10, 20);
+  init_entities();
+  //draw_sprite(bitmap1, 0, 0);
+  player_x = 96;
+  while (1) {
+    if (LEFT1 && player_x>0) player_x -= 2;
+    if (RIGHT1 && player_x<200) player_x += 2;
+    if (FIRE1 && bullet_y == 0) {
+      bullet_x = player_x + 13;
+      bullet_y = 3;
+      xor_sprite(bullet_bitmap, bullet_x, bullet_y); // draw
+    }
+    draw_sprite(player_bitmap, player_x, 1);
+    draw_sprite(player_bitmap, player_x, 1);
+    if (bullet_y) {
+      byte leftover = xor_sprite(bullet_bitmap, bullet_x, bullet_y); // erase
+      if (leftover || bullet_y > 26) {
+        erase_sprite(bullet_bitmap, bullet_x, bullet_y);
+        check_bullet_hit(bullet_x, bullet_y+2);
+        bullet_y = 0;
+      } else {
+        bullet_y++;
+        xor_sprite(bullet_bitmap, bullet_x, bullet_y); // draw
+      }
+    }
+    update_next_entity();
+    watchdog_strobe = 0;
+  }
+}
+
+void clrscr() {
+  memset(vidmem, 0, sizeof(vidmem));
+}
+
+void main() {
+  // TODO: clear memory
+  clrscr();
+  draw_string("PLAYER 1", 0, 31);
+  draw_string("PLAYER 2", 20, 31);
+  gameloop();
+}
diff --git a/presets/vicdual/minimal.c b/presets/vicdual/minimal.c
index 2cf44d3f..a3b8cb1e 100644
--- a/presets/vicdual/minimal.c
+++ b/presets/vicdual/minimal.c
@@ -10,6 +10,7 @@ byte __at (0xe800) tileram[256][8];
 
 void main();
 
+// start routine @ 0x0
 void start() {
 __asm
   	LD    SP,#0xE800 ; set up stack pointer
@@ -18,17 +19,15 @@ __endasm;
 	main();
 }
 
-#if start != 0x0
-#error start() function must be at address 0x0!
-#endif
-
 void main() {
   byte x,y;
+  
   palette = 1;
   memset(tileram, 0xfe, sizeof(tileram));
+  memset(cellram, 0, sizeof(tileram));
   for (y=0; y<32; y++) {
     for (x=0; x<32; x++) {
-      cellram[x][y] = y*8;
+      cellram[x][y] = (y<<3);
     }
   }
   while (1) ;
diff --git a/presets/vicdual/snake1.c b/presets/vicdual/snake1.c
new file mode 100644
index 00000000..e53777b4
--- /dev/null
+++ b/presets/vicdual/snake1.c
@@ -0,0 +1,212 @@
+#include <string.h>
+
+typedef unsigned char byte;
+typedef unsigned short word;
+
+// PLATFORM DEFINITION
+
+__sfr __at (0x0) input0;
+__sfr __at (0x1) input1;
+__sfr __at (0x2) input2;
+__sfr __at (0x3) input3;
+
+__sfr __at (0x40) palette;
+
+byte __at (0xe000) cellram[32][32];
+byte __at (0xe800) tileram[256][8];
+
+#define LEFT1 !(input1 & 0x10)
+#define RIGHT1 !(input1 & 0x20)
+#define UP1 !(input1 & 0x40)
+#define DOWN1 !(input1 & 0x80)
+#define FIRE1 !(input2 & 0x20)
+#define COIN1 (input3 & 0x8)
+#define START1 !(input2 & 0x10)
+#define START2 !(input3 & 0x20)
+
+// GAME DATA
+
+typedef struct {
+  byte x;
+  byte y;
+  byte dir;
+  char head_attr;
+  char tail_attr;
+  char collided:1;
+} Player;
+
+Player players[2];
+
+#define FRAMES_PER_MOVE 10
+
+// GAME CODE
+
+void main();
+
+// start routine @ 0x0
+void start() {
+__asm
+  	LD    SP,#0xE800 ; set up stack pointer
+        DI		 ; disable interrupts
+__endasm;
+	main();
+}
+
+////////
+
+void wait_for_vsync() {
+  while ((input1 & 0x8) != 0) ; // wait for VSYNC end
+  while ((input1 & 0x8) == 0) ; // wait for VSYNC start
+}
+
+#define LOCHAR 0x0
+#define HICHAR 0xff
+#define CHAR(ch) (ch-LOCHAR)
+
+void clrscr() {
+  memset(cellram, CHAR(' '), sizeof(cellram));
+}
+
+byte getchar(byte x, byte y) {
+  return cellram[x][y];
+}
+
+void putchar(byte x, byte y, byte attr) {
+  cellram[x][y] = attr;
+}
+
+void putstring(byte x, byte y, const char* string) {
+  while (*string) {
+    putchar(x++, y, (*string++ - LOCHAR));
+  }
+}
+
+// PC font (code page 437)
+const byte font8x8[0x100][8] = {
+{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, { 0x7e,0x81,0x95,0xb1,0xb1,0x95,0x81,0x7e }, { 0x7e,0xff,0xeb,0xcf,0xcf,0xeb,0xff,0x7e }, { 0x0e,0x1f,0x3f,0x7e,0x3f,0x1f,0x0e,0x00 }, { 0x08,0x1c,0x3e,0x7f,0x3e,0x1c,0x08,0x00 }, { 0x38,0x3a,0x9f,0xff,0x9f,0x3a,0x38,0x00 }, { 0x10,0x38,0xbc,0xff,0xbc,0x38,0x10,0x00 }, { 0x00,0x00,0x18,0x3c,0x3c,0x18,0x00,0x00 }, { 0xff,0xff,0xe7,0xc3,0xc3,0xe7,0xff,0xff }, { 0x00,0x3c,0x66,0x42,0x42,0x66,0x3c,0x00 }, { 0xff,0xc3,0x99,0xbd,0xbd,0x99,0xc3,0xff }, { 0x70,0xf8,0x88,0x88,0xfd,0x7f,0x07,0x0f }, { 0x00,0x4e,0x5f,0xf1,0xf1,0x5f,0x4e,0x00 }, { 0xc0,0xe0,0xff,0x7f,0x05,0x05,0x07,0x07 }, { 0xc0,0xff,0x7f,0x05,0x05,0x65,0x7f,0x3f }, { 0x99,0x5a,0x3c,0xe7,0xe7,0x3c,0x5a,0x99 }, { 0x7f,0x3e,0x3e,0x1c,0x1c,0x08,0x08,0x00 }, { 0x08,0x08,0x1c,0x1c,0x3e,0x3e,0x7f,0x00 }, { 0x00,0x24,0x66,0xff,0xff,0x66,0x24,0x00 }, { 0x00,0x5f,0x5f,0x00,0x00,0x5f,0x5f,0x00 }, { 0x06,0x0f,0x09,0x7f,0x7f,0x01,0x7f,0x7f }, { 0xda,0xbf,0xa5,0xa5,0xfd,0x59,0x03,0x02 }, { 0x00,0x70,0x70,0x70,0x70,0x70,0x70,0x00 }, { 0x80,0x94,0xb6,0xff,0xff,0xb6,0x94,0x80 }, { 0x00,0x04,0x06,0x7f,0x7f,0x06,0x04,0x00 }, { 0x00,0x10,0x30,0x7f,0x7f,0x30,0x10,0x00 }, { 0x08,0x08,0x08,0x2a,0x3e,0x1c,0x08,0x00 }, { 0x08,0x1c,0x3e,0x2a,0x08,0x08,0x08,0x00 }, { 0x3c,0x3c,0x20,0x20,0x20,0x20,0x20,0x00 }, { 0x08,0x1c,0x3e,0x08,0x08,0x3e,0x1c,0x08 }, { 0x30,0x38,0x3c,0x3e,0x3e,0x3c,0x38,0x30 }, { 0x06,0x0e,0x1e,0x3e,0x3e,0x1e,0x0e,0x06 }, { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, { 0x00,0x06,0x5f,0x5f,0x06,0x00,0x00,0x00 }, { 0x00,0x07,0x07,0x00,0x07,0x07,0x00,0x00 }, { 0x14,0x7f,0x7f,0x14,0x7f,0x7f,0x14,0x00 }, { 0x24,0x2e,0x6b,0x6b,0x3a,0x12,0x00,0x00 }, { 0x46,0x66,0x30,0x18,0x0c,0x66,0x62,0x00 }, { 0x30,0x7a,0x4f,0x5d,0x37,0x7a,0x48,0x00 }, { 0x04,0x07,0x03,0x00,0x00,0x00,0x00,0x00 }, { 0x00,0x1c,0x3e,0x63,0x41,0x00,0x00,0x00 }, { 0x00,0x41,0x63,0x3e,0x1c,0x00,0x00,0x00 }, { 0x08,0x2a,0x3e,0x1c,0x1c,0x3e,0x2a,0x08 }, { 0x08,0x08,0x3e,0x3e,0x08,0x08,0x00,0x00 }, { 0x00,0xa0,0xe0,0x60,0x00,0x00,0x00,0x00 }, { 0x08,0x08,0x08,0x08,0x08,0x08,0x00,0x00 }, { 0x00,0x00,0x60,0x60,0x00,0x00,0x00,0x00 }, { 0x60,0x30,0x18,0x0c,0x06,0x03,0x01,0x00 }, { 0x3e,0x7f,0x59,0x4d,0x7f,0x3e,0x00,0x00 }, { 0x42,0x42,0x7f,0x7f,0x40,0x40,0x00,0x00 }, { 0x62,0x73,0x59,0x49,0x6f,0x66,0x00,0x00 }, { 0x22,0x63,0x49,0x49,0x7f,0x36,0x00,0x00 }, { 0x18,0x1c,0x16,0x13,0x7f,0x7f,0x10,0x00 }, { 0x27,0x67,0x45,0x45,0x7d,0x39,0x00,0x00 }, { 0x3c,0x7e,0x4b,0x49,0x79,0x30,0x00,0x00 }, { 0x03,0x63,0x71,0x19,0x0f,0x07,0x00,0x00 }, { 0x36,0x7f,0x49,0x49,0x7f,0x36,0x00,0x00 }, { 0x06,0x4f,0x49,0x69,0x3f,0x1e,0x00,0x00 }, { 0x00,0x00,0x6c,0x6c,0x00,0x00,0x00,0x00 }, { 0x00,0xa0,0xec,0x6c,0x00,0x00,0x00,0x00 }, { 0x08,0x1c,0x36,0x63,0x41,0x00,0x00,0x00 }, { 0x14,0x14,0x14,0x14,0x14,0x14,0x00,0x00 }, { 0x00,0x41,0x63,0x36,0x1c,0x08,0x00,0x00 }, { 0x02,0x03,0x51,0x59,0x0f,0x06,0x00,0x00 }, { 0x3e,0x7f,0x41,0x5d,0x5d,0x1f,0x1e,0x00 }, { 0x7c,0x7e,0x13,0x13,0x7e,0x7c,0x00,0x00 }, { 0x41,0x7f,0x7f,0x49,0x49,0x7f,0x36,0x00 }, { 0x1c,0x3e,0x63,0x41,0x41,0x63,0x22,0x00 }, { 0x41,0x7f,0x7f,0x41,0x63,0x7f,0x1c,0x00 }, { 0x41,0x7f,0x7f,0x49,0x5d,0x41,0x63,0x00 }, { 0x41,0x7f,0x7f,0x49,0x1d,0x01,0x03,0x00 }, { 0x1c,0x3e,0x63,0x41,0x51,0x73,0x72,0x00 }, { 0x7f,0x7f,0x08,0x08,0x7f,0x7f,0x00,0x00 }, { 0x00,0x41,0x7f,0x7f,0x41,0x00,0x00,0x00 }, { 0x30,0x70,0x40,0x41,0x7f,0x3f,0x01,0x00 }, { 0x41,0x7f,0x7f,0x08,0x1c,0x77,0x63,0x00 }, { 0x41,0x7f,0x7f,0x41,0x40,0x60,0x70,0x00 }, { 0x7f,0x7f,0x06,0x0c,0x06,0x7f,0x7f,0x00 }, { 0x7f,0x7f,0x06,0x0c,0x18,0x7f,0x7f,0x00 }, { 0x1c,0x3e,0x63,0x41,0x63,0x3e,0x1c,0x00 }, { 0x41,0x7f,0x7f,0x49,0x09,0x0f,0x06,0x00 }, { 0x1e,0x3f,0x21,0x71,0x7f,0x5e,0x00,0x00 }, { 0x41,0x7f,0x7f,0x19,0x39,0x6f,0x46,0x00 }, { 0x26,0x67,0x4d,0x59,0x7b,0x32,0x00,0x00 }, { 0x03,0x41,0x7f,0x7f,0x41,0x03,0x00,0x00 }, { 0x7f,0x7f,0x40,0x40,0x7f,0x7f,0x00,0x00 }, { 0x1f,0x3f,0x60,0x60,0x3f,0x1f,0x00,0x00 }, { 0x7f,0x7f,0x30,0x18,0x30,0x7f,0x7f,0x00 }, { 0x63,0x77,0x1c,0x08,0x1c,0x77,0x63,0x00 }, { 0x07,0x4f,0x78,0x78,0x4f,0x07,0x00,0x00 }, { 0x67,0x73,0x59,0x4d,0x47,0x63,0x71,0x00 }, { 0x00,0x7f,0x7f,0x41,0x41,0x00,0x00,0x00 }, { 0x01,0x03,0x06,0x0c,0x18,0x30,0x60,0x00 }, { 0x00,0x41,0x41,0x7f,0x7f,0x00,0x00,0x00 }, { 0x08,0x0c,0x06,0x03,0x06,0x0c,0x08,0x00 }, { 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80 }, { 0x00,0x00,0x03,0x07,0x04,0x00,0x00,0x00 }, { 0x20,0x74,0x54,0x54,0x3c,0x78,0x40,0x00 }, { 0x41,0x3f,0x7f,0x44,0x44,0x7c,0x38,0x00 }, { 0x38,0x7c,0x44,0x44,0x6c,0x28,0x00,0x00 }, { 0x30,0x78,0x48,0x49,0x3f,0x7f,0x40,0x00 }, { 0x38,0x7c,0x54,0x54,0x5c,0x18,0x00,0x00 }, { 0x48,0x7e,0x7f,0x49,0x03,0x02,0x00,0x00 }, { 0x98,0xbc,0xa4,0xa4,0xf8,0x7c,0x04,0x00 }, { 0x41,0x7f,0x7f,0x08,0x04,0x7c,0x78,0x00 }, { 0x00,0x44,0x7d,0x7d,0x40,0x00,0x00,0x00 }, { 0x40,0xc4,0x84,0xfd,0x7d,0x00,0x00,0x00 }, { 0x41,0x7f,0x7f,0x10,0x38,0x6c,0x44,0x00 }, { 0x00,0x41,0x7f,0x7f,0x40,0x00,0x00,0x00 }, { 0x7c,0x7c,0x0c,0x18,0x0c,0x7c,0x78,0x00 }, { 0x7c,0x7c,0x04,0x04,0x7c,0x78,0x00,0x00 }, { 0x38,0x7c,0x44,0x44,0x7c,0x38,0x00,0x00 }, { 0x84,0xfc,0xf8,0xa4,0x24,0x3c,0x18,0x00 }, { 0x18,0x3c,0x24,0xa4,0xf8,0xfc,0x84,0x00 }, { 0x44,0x7c,0x78,0x44,0x1c,0x18,0x00,0x00 }, { 0x48,0x5c,0x54,0x54,0x74,0x24,0x00,0x00 }, { 0x00,0x04,0x3e,0x7f,0x44,0x24,0x00,0x00 }, { 0x3c,0x7c,0x40,0x40,0x3c,0x7c,0x40,0x00 }, { 0x1c,0x3c,0x60,0x60,0x3c,0x1c,0x00,0x00 }, { 0x3c,0x7c,0x60,0x30,0x60,0x7c,0x3c,0x00 }, { 0x44,0x6c,0x38,0x10,0x38,0x6c,0x44,0x00 }, { 0x9c,0xbc,0xa0,0xa0,0xfc,0x7c,0x00,0x00 }, { 0x4c,0x64,0x74,0x5c,0x4c,0x64,0x00,0x00 }, { 0x08,0x08,0x3e,0x77,0x41,0x41,0x00,0x00 }, { 0x00,0x00,0x00,0x77,0x77,0x00,0x00,0x00 }, { 0x41,0x41,0x77,0x3e,0x08,0x08,0x00,0x00 }, { 0x02,0x03,0x01,0x03,0x02,0x03,0x01,0x00 }, { 0x78,0x7c,0x46,0x43,0x46,0x7c,0x78,0x00 }, { 0x0e,0x9f,0x91,0xb1,0xfb,0x4a,0x00,0x00 }, { 0x3a,0x7a,0x40,0x40,0x7a,0x7a,0x40,0x00 }, { 0x38,0x7c,0x54,0x55,0x5d,0x19,0x00,0x00 }, { 0x02,0x23,0x75,0x55,0x55,0x7d,0x7b,0x42 }, { 0x21,0x75,0x54,0x54,0x7d,0x79,0x40,0x00 }, { 0x21,0x75,0x55,0x54,0x7c,0x78,0x40,0x00 }, { 0x20,0x74,0x57,0x57,0x7c,0x78,0x40,0x00 }, { 0x18,0x3c,0xa4,0xa4,0xa4,0xe4,0x40,0x00 }, { 0x02,0x3b,0x7d,0x55,0x55,0x5d,0x1b,0x02 }, { 0x39,0x7d,0x54,0x54,0x5d,0x19,0x00,0x00 }, { 0x39,0x7d,0x55,0x54,0x5c,0x18,0x00,0x00 }, { 0x01,0x45,0x7c,0x7c,0x41,0x01,0x00,0x00 }, { 0x02,0x03,0x45,0x7d,0x7d,0x43,0x02,0x00 }, { 0x01,0x45,0x7d,0x7c,0x40,0x00,0x00,0x00 }, { 0x79,0x7d,0x26,0x26,0x7d,0x79,0x00,0x00 }, { 0x70,0x78,0x2b,0x2b,0x78,0x70,0x00,0x00 }, { 0x44,0x7c,0x7c,0x55,0x55,0x45,0x00,0x00 }, { 0x20,0x74,0x54,0x54,0x7c,0x7c,0x54,0x54 }, { 0x7c,0x7e,0x0b,0x09,0x7f,0x7f,0x49,0x00 }, { 0x32,0x7b,0x49,0x49,0x7b,0x32,0x00,0x00 }, { 0x32,0x7a,0x48,0x48,0x7a,0x32,0x00,0x00 }, { 0x32,0x7a,0x4a,0x48,0x78,0x30,0x00,0x00 }, { 0x3a,0x7b,0x41,0x41,0x7b,0x7a,0x40,0x00 }, { 0x3a,0x7a,0x42,0x40,0x78,0x78,0x40,0x00 }, { 0xba,0xba,0xa0,0xa0,0xfa,0x7a,0x00,0x00 }, { 0x19,0x3d,0x66,0x66,0x66,0x3d,0x19,0x00 }, { 0x3d,0x7d,0x40,0x40,0x7d,0x3d,0x00,0x00 }, { 0x18,0x3c,0x24,0xe7,0xe7,0x24,0x24,0x00 }, { 0x68,0x7e,0x7f,0x49,0x43,0x66,0x20,0x00 }, { 0x2b,0x2f,0x7c,0x7c,0x2f,0x2b,0x00,0x00 }, { 0x7f,0x7f,0x09,0x2f,0xf6,0xf8,0xa0,0x00 }, { 0x40,0xc8,0x88,0xfe,0x7f,0x09,0x0b,0x02 }, { 0x20,0x74,0x54,0x55,0x7d,0x79,0x40,0x00 }, { 0x00,0x44,0x7d,0x7d,0x41,0x00,0x00,0x00 }, { 0x30,0x78,0x48,0x4a,0x7a,0x32,0x00,0x00 }, { 0x38,0x78,0x40,0x42,0x7a,0x7a,0x40,0x00 }, { 0x7a,0x7a,0x0a,0x0a,0x7a,0x70,0x00,0x00 }, { 0x7d,0x7d,0x19,0x31,0x7d,0x7d,0x00,0x00 }, { 0x00,0x26,0x2f,0x29,0x2f,0x2f,0x28,0x00 }, { 0x00,0x26,0x2f,0x29,0x29,0x2f,0x26,0x00 }, { 0x30,0x78,0x4d,0x45,0x60,0x20,0x00,0x00 }, { 0x38,0x38,0x08,0x08,0x08,0x08,0x00,0x00 }, { 0x08,0x08,0x08,0x08,0x38,0x38,0x00,0x00 }, { 0x67,0x37,0x18,0xcc,0xee,0xab,0xb9,0x90 }, { 0x6f,0x3f,0x18,0x4c,0x66,0x73,0xf9,0xf8 }, { 0x00,0x00,0x60,0xfa,0xfa,0x60,0x00,0x00 }, { 0x08,0x1c,0x36,0x22,0x08,0x1c,0x36,0x22 }, { 0x22,0x36,0x1c,0x08,0x22,0x36,0x1c,0x08 }, { 0xaa,0x00,0x55,0x00,0xaa,0x00,0x55,0x00 }, { 0xaa,0x55,0xaa,0x55,0xaa,0x55,0xaa,0x55 }, { 0x55,0xff,0xaa,0xff,0x55,0xff,0xaa,0xff }, { 0x00,0x00,0x00,0xff,0xff,0x00,0x00,0x00 }, { 0x10,0x10,0x10,0xff,0xff,0x00,0x00,0x00 }, { 0x14,0x14,0x14,0xff,0xff,0x00,0x00,0x00 }, { 0x10,0x10,0xff,0xff,0x00,0xff,0xff,0x00 }, { 0x10,0x10,0xf0,0xf0,0x10,0xf0,0xf0,0x00 }, { 0x14,0x14,0x14,0xfc,0xfc,0x00,0x00,0x00 }, { 0x14,0x14,0xf7,0xf7,0x00,0xff,0xff,0x00 }, { 0x00,0x00,0xff,0xff,0x00,0xff,0xff,0x00 }, { 0x14,0x14,0xf4,0xf4,0x04,0xfc,0xfc,0x00 }, { 0x14,0x14,0x17,0x17,0x10,0x1f,0x1f,0x00 }, { 0x10,0x10,0x1f,0x1f,0x10,0x1f,0x1f,0x00 }, { 0x14,0x14,0x14,0x1f,0x1f,0x00,0x00,0x00 }, { 0x10,0x10,0x10,0xf0,0xf0,0x00,0x00,0x00 }, { 0x00,0x00,0x00,0x1f,0x1f,0x10,0x10,0x10 }, { 0x10,0x10,0x10,0x1f,0x1f,0x10,0x10,0x10 }, { 0x10,0x10,0x10,0xf0,0xf0,0x10,0x10,0x10 }, { 0x00,0x00,0x00,0xff,0xff,0x10,0x10,0x10 }, { 0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10 }, { 0x10,0x10,0x10,0xff,0xff,0x10,0x10,0x10 }, { 0x00,0x00,0x00,0xff,0xff,0x14,0x14,0x14 }, { 0x00,0x00,0xff,0xff,0x00,0xff,0xff,0x10 }, { 0x00,0x00,0x1f,0x1f,0x10,0x17,0x17,0x14 }, { 0x00,0x00,0xfc,0xfc,0x04,0xf4,0xf4,0x14 }, { 0x14,0x14,0x17,0x17,0x10,0x17,0x17,0x14 }, { 0x14,0x14,0xf4,0xf4,0x04,0xf4,0xf4,0x14 }, { 0x00,0x00,0xff,0xff,0x00,0xf7,0xf7,0x14 }, { 0x14,0x14,0x14,0x14,0x14,0x14,0x14,0x14 }, { 0x14,0x14,0xf7,0xf7,0x00,0xf7,0xf7,0x14 }, { 0x14,0x14,0x14,0x17,0x17,0x14,0x14,0x14 }, { 0x10,0x10,0x1f,0x1f,0x10,0x1f,0x1f,0x10 }, { 0x14,0x14,0x14,0xf4,0xf4,0x14,0x14,0x14 }, { 0x10,0x10,0xf0,0xf0,0x10,0xf0,0xf0,0x10 }, { 0x00,0x00,0x1f,0x1f,0x10,0x1f,0x1f,0x10 }, { 0x00,0x00,0x00,0x1f,0x1f,0x14,0x14,0x14 }, { 0x00,0x00,0x00,0xfc,0xfc,0x14,0x14,0x14 }, { 0x00,0x00,0xf0,0xf0,0x10,0xf0,0xf0,0x10 }, { 0x10,0x10,0xff,0xff,0x00,0xff,0xff,0x10 }, { 0x14,0x14,0x14,0xf7,0xf7,0x14,0x14,0x14 }, { 0x10,0x10,0x10,0x1f,0x1f,0x00,0x00,0x00 }, { 0x00,0x00,0x00,0xf0,0xf0,0x10,0x10,0x10 }, { 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff }, { 0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0 }, { 0xff,0xff,0xff,0xff,0x00,0x00,0x00,0x00 }, { 0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff }, { 0x0f,0x0f,0x0f,0x0f,0x0f,0x0f,0x0f,0x0f }, { 0x38,0x7c,0x44,0x6c,0x38,0x6c,0x44,0x00 }, { 0xfc,0xfe,0x2a,0x2a,0x3e,0x14,0x00,0x00 }, { 0x7e,0x7e,0x02,0x02,0x02,0x06,0x06,0x00 }, { 0x02,0x7e,0x7e,0x02,0x7e,0x7e,0x02,0x00 }, { 0x41,0x63,0x77,0x5d,0x49,0x63,0x63,0x00 }, { 0x38,0x7c,0x44,0x44,0x7c,0x3c,0x04,0x00 }, { 0x80,0xfe,0x7e,0x20,0x20,0x3e,0x1e,0x00 }, { 0x04,0x06,0x02,0x7e,0x7c,0x06,0x02,0x00 }, { 0x99,0xbd,0xe7,0xe7,0xbd,0x99,0x00,0x00 }, { 0x1c,0x3e,0x6b,0x49,0x6b,0x3e,0x1c,0x00 }, { 0x4c,0x7e,0x73,0x01,0x73,0x7e,0x4c,0x00 }, { 0x30,0x78,0x4a,0x4f,0x7d,0x39,0x00,0x00 }, { 0x18,0x3c,0x24,0x3c,0x3c,0x24,0x3c,0x18 }, { 0x98,0xfc,0x64,0x3c,0x3e,0x27,0x3d,0x18 }, { 0x1c,0x3e,0x6b,0x49,0x49,0x49,0x00,0x00 }, { 0x7e,0x7f,0x01,0x01,0x7f,0x7e,0x00,0x00 }, { 0x2a,0x2a,0x2a,0x2a,0x2a,0x2a,0x00,0x00 }, { 0x44,0x44,0x5f,0x5f,0x44,0x44,0x00,0x00 }, { 0x40,0x51,0x5b,0x4e,0x44,0x40,0x00,0x00 }, { 0x40,0x44,0x4e,0x5b,0x51,0x40,0x00,0x00 }, { 0x00,0x00,0x00,0xfe,0xff,0x01,0x07,0x06 }, { 0x60,0xe0,0x80,0xff,0x7f,0x00,0x00,0x00 }, { 0x08,0x08,0x6b,0x6b,0x08,0x08,0x00,0x00 }, { 0x24,0x12,0x12,0x36,0x24,0x24,0x12,0x00 }, { 0x00,0x06,0x0f,0x09,0x0f,0x06,0x00,0x00 }, { 0x00,0x00,0x00,0x18,0x18,0x00,0x00,0x00 }, { 0x00,0x00,0x00,0x10,0x10,0x00,0x00,0x00 }, { 0x10,0x30,0x70,0xc0,0xff,0xff,0x01,0x01 }, { 0x00,0x1f,0x1f,0x01,0x1f,0x1e,0x00,0x00 }, { 0x00,0x19,0x1d,0x15,0x17,0x12,0x00,0x00 }, { 0x00,0x00,0x3c,0x3c,0x3c,0x3c,0x00,0x00 }, { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }
+};
+
+const char BOX_CHARS[8] = { 218, 191, 192, 217, 196, 196, 179, 179 };
+
+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]);
+  while (++x < x2) {
+    putchar(x, y, chars[5]);
+    putchar(x, y2, chars[4]);
+  }
+  while (++y < y2) {
+    putchar(x1, y, chars[6]);
+    putchar(x2, y, chars[7]);
+  }
+}
+
+void draw_playfield() {
+  draw_box(0,0,27,29,BOX_CHARS);
+}
+
+typedef enum { D_RIGHT, D_DOWN, D_LEFT, D_UP } dir_t;
+const char DIR_X[4] = { 1, 0, -1, 0 };
+const char DIR_Y[4] = { 0, -1, 0, 1 };
+
+void init_game() {
+  memset(players, 0, sizeof(players));
+  players[0].head_attr = CHAR('1');
+  players[1].head_attr = CHAR('2');
+  players[0].tail_attr = 254;
+  players[1].tail_attr = 254;
+}
+
+void reset_players() {
+  players[0].x = players[0].y = 6;
+  players[0].dir = D_RIGHT;
+  players[1].x = players[1].y = 21;
+  players[1].dir = D_LEFT;
+  players[0].collided = players[1].collided = 0;
+}
+
+void draw_player(Player* p) {
+  putchar(p->x, p->y, p->head_attr);
+}
+
+void move_player(Player* p) {
+  putchar(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(' '))
+    p->collided = 1;
+  draw_player(p);
+}
+
+void human_control(Player* p) {
+  byte dir = 0xff;
+  if (LEFT1) dir = D_LEFT;
+  if (RIGHT1) dir = D_RIGHT;
+  if (UP1) dir = D_UP;
+  if (DOWN1) dir = D_DOWN;
+  // don't let the player reverse
+  if (dir < 0x80 && dir != (p->dir ^ 2)) {
+    p->dir = dir;
+  }
+}
+
+void ai_control(Player* p) {
+  byte x,y;
+  dir_t dir = p->dir;
+  x = p->x + DIR_X[dir];
+  y = p->y + DIR_Y[dir];
+  if (getchar(x,y) != CHAR(' ')) {
+    p->dir = (dir + 1) & 3;
+  }
+}
+
+void flash_colliders() {
+  byte i;
+  // flash players that collided
+  for (i=0; i<60; i++) {
+    if (players[0].collided) players[0].head_attr ^= 0x80;
+    if (players[1].collided) players[1].head_attr ^= 0x80;
+    wait_for_vsync();
+    wait_for_vsync();
+    draw_player(&players[0]);
+    draw_player(&players[1]);
+    palette = i;
+  }
+  palette = 0;
+}
+
+void make_move() {
+  byte i;
+  for (i=0; i<FRAMES_PER_MOVE; i++) {
+    human_control(&players[0]);
+    wait_for_vsync();
+  }
+  ai_control(&players[1]);
+  // if players collide, 2nd player gets the point
+  move_player(&players[1]);
+  move_player(&players[0]);
+}
+
+void play_round() {
+  reset_players();
+  clrscr();
+  draw_playfield();
+  while (1) {
+    make_move();
+    if (players[0].collided || players[1].collided) break;
+  }
+  flash_colliders();
+}
+
+void main() {
+  palette = 0;
+  memcpy(tileram, font8x8, sizeof(font8x8));
+  draw_playfield();
+  while (1) {
+    init_game();
+    play_round();
+  }
+}
diff --git a/presets/vicdual/snake.c b/presets/vicdual/snake2.c
similarity index 98%
rename from presets/vicdual/snake.c
rename to presets/vicdual/snake2.c
index 63c4b550..874510e6 100644
--- a/presets/vicdual/snake.c
+++ b/presets/vicdual/snake2.c
@@ -165,18 +165,6 @@ void draw_bcd_word(byte x, byte y, word bcd) {
   }
 }
 
-/*
-void draw_bcd_byte(byte x, byte y, byte bcd) {
-  putchar(CHAR('0'+(bcd&0xf)), x+1, y);
-  putchar(CHAR('0'+((bcd>>4)&0xf)), x, y);
-}
-
-void draw_bcd_word2(byte x, byte y, word bcd) {
-  draw_bcd_byte(x+2, y, bcd);
-  draw_bcd_byte(x, y, bcd>>8);
-}
-*/
-
 void draw_playfield() {
   draw_box(0,0,27,29,BOX_CHARS);
   putstring(0,31,"PLAYER 1");
diff --git a/src/platform/mw8080bw.js b/src/platform/mw8080bw.js
index 5362aed1..422a0506 100644
--- a/src/platform/mw8080bw.js
+++ b/src/platform/mw8080bw.js
@@ -3,6 +3,7 @@
 // http://www.computerarcheology.com/Arcade/
 
 var MW8080BW_PRESETS = [
+  {id:'game2.c', name:'Game #2'},
 ];
 
 var Midway8080BWPlatform = function(mainElement) {
diff --git a/src/platform/vicdual.js b/src/platform/vicdual.js
index 10c4d9fb..0dd5d63d 100644
--- a/src/platform/vicdual.js
+++ b/src/platform/vicdual.js
@@ -5,7 +5,8 @@ var VICDUAL_PRESETS = [
   {id:'hello.c', name:'Hello World'},
   {id:'gfxtest.c', name:'Graphics Test'},
   {id:'soundtest.c', name:'Sound Test'},
-  {id:'snake.c', name:'Snake Game'},
+  {id:'snake1.c', name:'Snake Game #1'},
+  {id:'snake2.c', name:'Snake Game #2'},
 ];
 
 var VicDualPlatform = function(mainElement) {
diff --git a/src/ui.js b/src/ui.js
index 551d1a62..af19811e 100644
--- a/src/ui.js
+++ b/src/ui.js
@@ -541,9 +541,9 @@ function getCurrentLine() {
 
 function getDisasmViewPC() {
   var line = disasmview.getCursor().line;
-  if (line) {
+  if (line >= 0) {
     var toks = disasmview.getLine(line).split(/\s+/);
-    if (toks) {
+    if (toks && toks[0].length == 4) {
       return parseInt(toks[0], 16);
     }
   }
@@ -551,11 +551,12 @@ function getDisasmViewPC() {
 
 function getCurrentPC() {
   var line = getCurrentLine();
-  var pc = sourcefile.line2offset[line];
-  if (!(pc >= 0)) {
-    return getDisasmViewPC();
+  while (line >= 0) {
+    var pc = sourcefile.line2offset[line];
+    if (pc >= 0) return pc;
+    line--;
   }
-  return pc;
+  return getDisasmViewPC();
 }
 
 function runToCursor() {