add next piece delay for when a line is cleared + cleanup

46 files changed, 1261 insertions, 92 deletions

diff --git a/core/include/cetris.h b/core/include/cetris.h
index 9e3cf83..1606f2a 100644
--- a/core/include/cetris.h
+++ b/core/include/cetris.h
@@ -10,16 +10,18 @@
 #define CETRIS_INITIAL_X 3

 #define CETRIS_INITIAL_Y 0

 #define CETRIS_INITIAL_Y_OFFSET 2 

-//#define CETRIS_BOARD_VISABLE 21 

 

 #define CETRIS_HZ 60

 #define CETRIS_DAS_DELAY 11 

 #define CETRIS_DAS_PERIOD 3

 #define CETRIS_DROP_PERIOD 2

+#define CETRIS_NEXT_PIECE_DELAY 40

 #define CETRIS_LINE_CLEAR_DELAY 40

 #define CETRIS_LOCK_DELAY 40

 #define CETRIS_WAIT_ON_CLEAR 0

 

+#define CETRIS_STARTING_LEVEL 1

+

 typedef enum {

   O, I, S, Z, L, J, T

 } type;

@@ -42,15 +44,16 @@ typedef enum {
   TWICE 

 } rstate;

 

-struct tetrimino {

+typedef struct {

   type t;

   rstate r;

   color c;

   piece_matrix m;

-  u8 ghost_y;

+  i8 ghost_y;

   vec2 pos;

   u32 lock_tick;

-};

+  bool locked;

+} tetrimino;

 

 typedef struct {

   bool occupied;

@@ -60,15 +63,15 @@ typedef struct {
   color c;

 } slot;

 

-struct cetris_game {

+typedef struct {

   /* playfield represented by a 2d array */

   slot board[CETRIS_BOARD_X][CETRIS_BOARD_Y];

 

   /* constant queue of all 7 possible tetrimino */

-  struct tetrimino piece_queue[7];

+  tetrimino piece_queue[7];

 

   /* current tetrimino */

-  struct tetrimino current;

+  tetrimino current;

   u8 current_index;

 

   /* input_manager */

@@ -81,6 +84,7 @@ struct cetris_game {
   /* internal game tick */

   u32 tick;

   u32 next_drop_tick;

+  u32 next_piece_tick;

 

   /* progress trackers */

   u32 lines;

@@ -92,15 +96,16 @@ struct cetris_game {
   bool mini_tspin;

 

   /* score counter  */

-  u64 score;

-};

+  u32 score;

+} cetris_game;

 

-void next_piece(struct cetris_game* g);

-void update_board(struct cetris_game* g);

+void next_piece(cetris_game* g);

+void update_board(cetris_game* g);

+void lock_current(cetris_game* g);

 

 /* API PROTOTYPES FUNCTIONS */

 

-void init_game(struct cetris_game* g);

-void update_game_tick(struct cetris_game* g);

-void move_piece(struct cetris_game* g, input_t move);

-void stop_holding(struct cetris_game* g, input_t move);

+void init_game(cetris_game* g);

+void update_game_tick(cetris_game* g);

+void move_piece(cetris_game* g, input_t move);

+void stop_holding(cetris_game* g, input_t move);

diff --git a/core/include/input.h b/core/include/input.h
index 3cfa947..95cb2aa 100644
--- a/core/include/input.h
+++ b/core/include/input.h
@@ -3,7 +3,7 @@
 #include <stdint.h>

 #include <stdbool.h>

 

-struct cetris_game;

+#include "cetris.h"

 

-bool handle_inputs(struct cetris_game* g);

-void clear_held_key(struct cetris_game* g);

+bool handle_inputs(cetris_game *g);

+void clear_held_key(cetris_game *g);

diff --git a/core/include/matrix.h b/core/include/matrix.h
index 050a32e..eb9e272 100644
--- a/core/include/matrix.h
+++ b/core/include/matrix.h
@@ -7,8 +7,8 @@
 

 extern const piece_matrix default_matrices[7];

 

-void move_current(struct cetris_game* g, input_t move);

-void hard_drop(struct cetris_game* g);

-void rotate_matrix(struct cetris_game* g, bool clockwise);

-void set_matrix(struct cetris_game* g, piece_matrix *m);

-i8 check_matrix(struct cetris_game* g, piece_matrix *m);

+void move_current(cetris_game* g, input_t move);

+void hard_drop(cetris_game* g);

+void rotate_matrix(cetris_game* g, bool clockwise);

+void set_matrix(cetris_game* g, piece_matrix* m);

+i8 check_matrix(cetris_game* g, piece_matrix* m);

diff --git a/core/include/test.h b/core/include/test.h
index d700627..4b8622e 100644
--- a/core/include/test.h
+++ b/core/include/test.h
@@ -1,8 +1,8 @@
-struct cetris_game;

+#include "cetris.h"

 

-enum tests {

+typedef enum {

   TSPIN,

   TSPIN_NO_LINES

-};

+} test;

 

-void apply_test_board(struct cetris_game* g, enum tests t);

+void apply_test_board( cetris_game* g, test t);

diff --git a/core/src/cetris.c b/core/src/cetris.c
index a3f2ded..4e404d6 100644
--- a/core/src/cetris.c
+++ b/core/src/cetris.c
@@ -1,4 +1,3 @@
-#include <locale.h>

 #include <time.h>

 #include <string.h>

 #include <stdlib.h>

@@ -16,10 +15,9 @@
 

 /* FUNCTION PROTOTYPES */

 

-static void init_piece_queue(struct cetris_game* g);

-static void shuffle_queue(struct cetris_game* g);

-static void set_constants(struct cetris_game* g);

-static void add_score(struct cetris_game* g, u8 lines);

+static void init_piece_queue(cetris_game* g);

+static void shuffle_queue(cetris_game* g);

+static void add_score(cetris_game* g, u8 lines);

 

 /* LEVEL DROP SPEED VALUES */

 

@@ -29,34 +27,20 @@ static const u32 level_drop_delay[20] = {
   

 /* GAME FUNCTIONS */

 

-void init_game(struct cetris_game* g) {

-  srand(time(NULL));

+void init_game(cetris_game* g) {

+  

+  /* check for config errors */

+  assert(CETRIS_NEXT_PIECE_DELAY >= CETRIS_LINE_CLEAR_DELAY);

 

-  memset(g->board, 0, sizeof(slot) * CETRIS_BOARD_X * CETRIS_BOARD_Y);

+  srand(time(NULL));

 

 #ifdef BUILD_TESTS

   apply_test_board(g, TSPIN_NO_LINES);

 #endif

 

-  g->tick = 0;

-  g->next_drop_tick = level_drop_delay[0];

-

-  g->current_index = 0;

+  memset(g, 0, sizeof(cetris_game));

 

-  memset(g->held_moves, 0, sizeof(bool) * 7);

-  g->das_repeat = 0;

-  g->prev_das_move = 0;

-  g->das_move_tick = 0;

-  g->down_move_tick = 0;

-

-  g->lines = 0;

-  g->level = 1;

-  g->game_over = false;

-

-  g->tspin = false;

-  g->mini_tspin = false;

-

-  g->score = 0;

+  g->level = CETRIS_STARTING_LEVEL;

 

   init_piece_queue(g);

   shuffle_queue(g);

@@ -64,34 +48,46 @@ void init_game(struct cetris_game* g) {
   next_piece(g);

 }

 

-void init_piece_queue(struct cetris_game* g) {

+void init_piece_queue(cetris_game* g) {

   for (u8 i = 0; i < 7; i++) {

     g->piece_queue[i].t = i;

     g->piece_queue[i].c = i + 1;

     memcpy(g->piece_queue[i].m, default_matrices[i], sizeof(piece_matrix));

     g->piece_queue[i].r = INIT;

     g->piece_queue[i].lock_tick = 0;

-    g->piece_queue[i].pos = (vec2){CETRIS_INITIAL_X, CETRIS_INITIAL_Y - CETRIS_INITIAL_Y_OFFSET};

+    g->piece_queue[i].locked = false;

     g->piece_queue[i].ghost_y = 0;

+    g->piece_queue[i].pos = (vec2){CETRIS_INITIAL_X, CETRIS_INITIAL_Y - CETRIS_INITIAL_Y_OFFSET};

   }

 }

 

-void shuffle_queue(struct cetris_game* g) {

+void shuffle_queue(cetris_game* g) {

   for (u8 i = 0; i < 7; i++) {

-    struct tetrimino t = g->piece_queue[i];

+    tetrimino t = g->piece_queue[i];

     u8 rand_index = rand() % 7;

     g->piece_queue[i] = g->piece_queue[rand_index];

     g->piece_queue[rand_index] = t;

   }

 }

 

-void update_game_tick(struct cetris_game* g) {

+void update_game_tick(cetris_game* g) {

   if (g->game_over) return;

 

+  g->tick++;

+

+  if (g->next_piece_tick && g->tick >= g->next_piece_tick) {

+    next_piece(g);

+  }

+  

+  if (g->next_piece_tick) return;

+

   bool did_move = false;

   if (g->tick >= g->next_drop_tick || !g->next_drop_tick) {

-    if (g->next_drop_tick) move_current(g, DOWN);

-    did_move = true;

+    if (g->next_drop_tick) {

+      move_current(g, DOWN);

+      did_move = true;

+    }

+

     if (g->level <= 20) {

       g->next_drop_tick = g->tick + level_drop_delay[g->level - 1];

     } else {

@@ -100,10 +96,11 @@ void update_game_tick(struct cetris_game* g) {
   }

 

   /* lock piece if it was hovering for CETRIS_LOCK_DELAY */

-  if (g->current.lock_tick && g->current.lock_tick <= g->tick) {

+  if (!g->next_piece_tick && g->current.lock_tick && g->current.lock_tick <= g->tick) {

     g->current.pos.y++;

     if (check_matrix(g, &g->current.m) <= 0) {

-      next_piece(g);

+      lock_current(g);

+      did_move = true;

     }

     g->current.pos.y--;

     g->current.lock_tick = 0;

@@ -114,14 +111,11 @@ void update_game_tick(struct cetris_game* g) {
   }

   

   if (did_move) update_board(g); 

-

-  g->tick++;

 }

 

-void next_piece(struct cetris_game* g) {

-  set_constants(g);

-  

+void next_piece(cetris_game* g) {

   g->next_drop_tick = 0;

+  g->next_piece_tick = 0;

 

   g->current = g->piece_queue[g->current_index];

   if (check_matrix(g, &g->current.m) <= 0) {

@@ -133,17 +127,21 @@ void next_piece(struct cetris_game* g) {
     g->current_index = 0;

     shuffle_queue(g);

   }

+

+  update_board(g);

 }

 

-void set_constants(struct cetris_game* g) {

+void lock_current(cetris_game* g) {

+  g->current.locked = true;

   for (u8 x = 0; x < CETRIS_BOARD_X; x++) { 

     for (u8 y = 0; y < CETRIS_BOARD_Y; y++) {

       if (g->board[x][y].occupied) g->board[x][y].constant = 1;

     }

   }

+  update_board(g);

 }

 

-void make_ghosts(struct cetris_game* g) {

+void make_ghosts(cetris_game* g) {

   u8 orig_y = g->current.pos.y;

   while (true) {

     g->current.pos.y++;

@@ -155,7 +153,9 @@ void make_ghosts(struct cetris_game* g) {
   }

 }

 

-void update_board(struct cetris_game* g) {

+void update_board(cetris_game* g) {

+  if (g->game_over) return;

+

   u8 lines_cleared = 0;

   for (u8 y = 0; y < CETRIS_BOARD_Y; y++) {

     bool clear_line = true;

@@ -175,15 +175,26 @@ void update_board(struct cetris_game* g) {
           g->board[x][s + 1] = g->board[x][s];

         }

       }

+    }

+    if (clear_line) {

+      g->board[0][y].remove_tick = g->tick + CETRIS_LINE_CLEAR_DELAY;

       lines_cleared++;

     }

-    if (clear_line) g->board[0][y].remove_tick = g->tick + CETRIS_LINE_CLEAR_DELAY;

   }

 

   make_ghosts(g);

   set_matrix(g, &g->current.m);

 

   assert(lines_cleared <= 4);

+

+  if (g->current.locked && !g->next_piece_tick) {

+    if (lines_cleared > 0) {

+      g->next_piece_tick = g->tick + CETRIS_NEXT_PIECE_DELAY;

+    } else {

+      next_piece(g);

+    }

+  }

+

   if (lines_cleared > 0 || g->tspin || g->mini_tspin) {

     add_score(g, lines_cleared);

     if (lines_cleared > 0) {

@@ -195,7 +206,7 @@ void update_board(struct cetris_game* g) {
 

 /* SCORE FUNCTIONS */

 

-void add_score(struct cetris_game* g, u8 lines) {

+void add_score(cetris_game* g, u8 lines) {

   if (!g->tspin && !g->mini_tspin) {

     switch (lines) {

       case 1: g->score += 100 * g->level; break;

@@ -223,7 +234,7 @@ void add_score(struct cetris_game* g, u8 lines) {
 

 /* MOVEMENT FUNCTIONS */

 

-void move_piece(struct cetris_game* g, input_t move) {

+void move_piece(cetris_game* g, input_t move) {

   if (!g->held_moves[move]) {

     switch (move) {

       case LEFT:

@@ -246,7 +257,7 @@ void move_piece(struct cetris_game* g, input_t move) {
   g->held_moves[move] = true;

 }

 

-void stop_holding(struct cetris_game* g, input_t move) {

+void stop_holding(cetris_game* g, input_t move) {

   g->held_moves[move] = false;

   if (move == RIGHT || move == LEFT) {

     g->das_move_tick = 0;

diff --git a/core/src/input.c b/core/src/input.c
index 2904158..65dead1 100644
--- a/core/src/input.c
+++ b/core/src/input.c
@@ -6,7 +6,7 @@
 #include "matrix.h"

 #include "cetris.h"

 

-bool handle_inputs(struct cetris_game* g) {

+bool handle_inputs(cetris_game* g) {

   if ((g->held_moves[RIGHT] || g->held_moves[LEFT]) && !g->das_move_tick) {

     if (g->das_repeat == 0) {

       g->das_move_tick = g->tick + CETRIS_DAS_DELAY;

diff --git a/core/src/matrix.c b/core/src/matrix.c
index 86e9ad2..caae107 100644
--- a/core/src/matrix.c
+++ b/core/src/matrix.c
@@ -88,8 +88,8 @@ const vec2 basic_movements[5] = {
   {0, 0}, {0, 1}, {0, 1}, {1, 0}, {-1, 0} // NONE, DOWN, USER_DOWN, RIGHT, LEFT

 };

 

-void move_current(struct cetris_game* g, input_t move) {

-  if (g->game_over) return;

+void move_current(cetris_game* g, input_t move) {

+  if (g->game_over || g->next_piece_tick) return;

 

   g->current.pos.y += basic_movements[move].y; 

   g->current.pos.x += basic_movements[move].x;

@@ -108,7 +108,7 @@ void move_current(struct cetris_game* g, input_t move) {
   update_board(g);

 }

 

-i8 check_matrix(struct cetris_game* g, piece_matrix *m) {

+i8 check_matrix(cetris_game* g, piece_matrix* m) {

   for (i8 y = 0; y < 4; y++) {

     for (i8 x = 0; x < 4; x++) {

       vec2 r = (vec2){x + g->current.pos.x, y + g->current.pos.y};

@@ -124,7 +124,7 @@ i8 check_matrix(struct cetris_game* g, piece_matrix *m) {
   return 1;

 }

 

-void set_matrix(struct cetris_game *g, piece_matrix *m) {

+void set_matrix(cetris_game* g, piece_matrix* m) {

   for (i8 y = 0; y < 4; y++) {

     for (i8 x = 0; x < 4; x++) {

       vec2 r = (vec2){x + g->current.pos.x, y + g->current.pos.y};

@@ -134,15 +134,17 @@ void set_matrix(struct cetris_game *g, piece_matrix *m) {
           g->board[r.x][r.y].c = g->current.c;

         }

         if (g->current.ghost_y + y >= 0) {

-          g->board[r.x][g->current.ghost_y + y].ghost = true;

+          if (r.y != (g->current.ghost_y + y)) { 

+            g->board[r.x][g->current.ghost_y + y].ghost = true;

+          }

         }

       }

     }

   }

 }

 

-void hard_drop(struct cetris_game* g) {

-  if (g->game_over) return;

+void hard_drop(cetris_game* g) {

+  if (g->game_over || g->next_piece_tick) return;

 

   bool drop = false;

   u8 drop_count = 0;

@@ -159,11 +161,11 @@ void hard_drop(struct cetris_game* g) {
   g->score += 2 * drop_count; // 2 score for each hard-drop'd cell

 

   update_board(g);

-  next_piece(g);

+  lock_current(g);

 }

 

-void rotate_matrix(struct cetris_game* g, bool clockwise) {

-  if (g->game_over) return;

+void rotate_matrix(cetris_game* g, bool clockwise) {

+  if (g->game_over || g->next_piece_tick) return;

   if (g->current.t == O) return;

   

   rstate next = 0; 

@@ -213,8 +215,11 @@ void rotate_matrix(struct cetris_game* g, bool clockwise) {
         u8 new_y = (clockwise) ? 2 + (x - 1) : 2 - (x - 1);

 

         if (g->current.t == I) {

-          if (clockwise) new_y--;

-          else new_x++;

+          if (clockwise) {

+            new_y--;

+          } else {

+            new_x++;

+          }

         }

 

         m[new_y][new_x] = 1;

@@ -231,8 +236,10 @@ void rotate_matrix(struct cetris_game* g, bool clockwise) {
     } else {

       kick = srs_wall_kicks[wall_kick][i];

     }

+

     g->current.pos.x += kick.x;

     g->current.pos.y += kick.y;

+

     if (check_matrix(g, &m) > 0) {

       set_current = true;

       if (i > 0) did_kick = true;

diff --git a/core/src/test.c b/core/src/test.c
index 7db2fe5..bad50d8 100644
--- a/core/src/test.c
+++ b/core/src/test.c
@@ -47,7 +47,7 @@ u8 tspin_no_lines_board[20][10] = {
   { 1, 1, 1, 1, 1, 1, 1, 1, 1, 0 }

 };

 

-void apply_test_board(struct cetris_game* g, enum tests t) {

+void apply_test_board(cetris_game* g, test t) {

   u8 (*board)[20][10];

   switch (t) {

     case TSPIN:

diff --git a/frontends/calculator/Makefile b/frontends/calculator/Makefile
new file mode 100644
index 0000000..505d4bf
--- /dev/null
+++ b/frontends/calculator/Makefile
@@ -0,0 +1,8 @@
+NAME        ?= Cetris 
+COMPRESSED  ?= NO
+ICON        ?= iconc.png
+DESCRIPTION ?= "Cetris for calculator"
+
+# ----------------------------
+
+include $(CEDEV)/include/.makefile
diff --git a/frontends/calculator/obj/gfx/block_1.src b/frontends/calculator/obj/gfx/block_1.src
new file mode 100644
index 0000000..19a50e7
--- /dev/null
+++ b/frontends/calculator/obj/gfx/block_1.src
@@ -0,0 +1,98 @@
+; Zilog eZ80 ANSI C Compiler Release 3.4

+; -optsize -noreduceopt -nomodsect -peephole -globalopt

+; -localcse -const=ROM 

+	FILE	"SRC\GFX\BLOCK_1.C"

+	.assume ADL=1

+	SEGMENT DATA

+_block_1_data:

+	DB	9

+	DB	9

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	0

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	2

+	DB	2

+	DB	5

+	DB	0

+	DB	0

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	2

+	DB	2

+	DB	5

+	DB	0

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	2

+	DB	2

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	2

+	DB	2

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	2

+	DB	2

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	2

+	DB	2

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	5

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	XDEF _block_1_data

+;    1	// convpng v7.0

+;    2	#include <stdint.h>

+;    3	#include "logo_gfx.h"

+;    4	

+;    5	// 8 bpp image

+;    6	uint8_t block_1_data[83] = {

+	END

diff --git a/frontends/calculator/obj/gfx/block_2.src b/frontends/calculator/obj/gfx/block_2.src
new file mode 100644
index 0000000..200b19f
--- /dev/null
+++ b/frontends/calculator/obj/gfx/block_2.src
@@ -0,0 +1,98 @@
+; Zilog eZ80 ANSI C Compiler Release 3.4

+; -optsize -noreduceopt -nomodsect -peephole -globalopt

+; -localcse -const=ROM 

+	FILE	"SRC\GFX\BLOCK_2.C"

+	.assume ADL=1

+	SEGMENT DATA

+_block_2_data:

+	DB	9

+	DB	9

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	0

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	2

+	DB	2

+	DB	7

+	DB	0

+	DB	0

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	2

+	DB	2

+	DB	7

+	DB	0

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	2

+	DB	2

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	2

+	DB	2

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	2

+	DB	2

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	2

+	DB	2

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	7

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	XDEF _block_2_data

+;    1	// convpng v7.0

+;    2	#include <stdint.h>

+;    3	#include "logo_gfx.h"

+;    4	

+;    5	// 8 bpp image

+;    6	uint8_t block_2_data[83] = {

+	END

diff --git a/frontends/calculator/obj/gfx/block_3.src b/frontends/calculator/obj/gfx/block_3.src
new file mode 100644
index 0000000..5126067
--- /dev/null
+++ b/frontends/calculator/obj/gfx/block_3.src
@@ -0,0 +1,98 @@
+; Zilog eZ80 ANSI C Compiler Release 3.4

+; -optsize -noreduceopt -nomodsect -peephole -globalopt

+; -localcse -const=ROM 

+	FILE	"SRC\GFX\BLOCK_3.C"

+	.assume ADL=1

+	SEGMENT DATA

+_block_3_data:

+	DB	9

+	DB	9

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	0

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	6

+	DB	0

+	DB	0

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	6

+	DB	0

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	XDEF _block_3_data

+;    1	// convpng v7.0

+;    2	#include <stdint.h>

+;    3	#include "logo_gfx.h"

+;    4	

+;    5	// 8 bpp image

+;    6	uint8_t block_3_data[83] = {

+	END

diff --git a/frontends/calculator/obj/gfx/block_4.src b/frontends/calculator/obj/gfx/block_4.src
new file mode 100644
index 0000000..bc9ad7d
--- /dev/null
+++ b/frontends/calculator/obj/gfx/block_4.src
@@ -0,0 +1,98 @@
+; Zilog eZ80 ANSI C Compiler Release 3.4

+; -optsize -noreduceopt -nomodsect -peephole -globalopt

+; -localcse -const=ROM 

+	FILE	"SRC\GFX\BLOCK_4.C"

+	.assume ADL=1

+	SEGMENT DATA

+_block_4_data:

+	DB	9

+	DB	9

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	0

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	2

+	DB	2

+	DB	3

+	DB	0

+	DB	0

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	2

+	DB	2

+	DB	3

+	DB	0

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	2

+	DB	2

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	2

+	DB	2

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	2

+	DB	2

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	2

+	DB	2

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	3

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	XDEF _block_4_data

+;    1	// convpng v7.0

+;    2	#include <stdint.h>

+;    3	#include "logo_gfx.h"

+;    4	

+;    5	// 8 bpp image

+;    6	uint8_t block_4_data[83] = {

+	END

diff --git a/frontends/calculator/obj/gfx/block_5.src b/frontends/calculator/obj/gfx/block_5.src
new file mode 100644
index 0000000..ec02546
--- /dev/null
+++ b/frontends/calculator/obj/gfx/block_5.src
@@ -0,0 +1,98 @@
+; Zilog eZ80 ANSI C Compiler Release 3.4

+; -optsize -noreduceopt -nomodsect -peephole -globalopt

+; -localcse -const=ROM 

+	FILE	"SRC\GFX\BLOCK_5.C"

+	.assume ADL=1

+	SEGMENT DATA

+_block_5_data:

+	DB	9

+	DB	9

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	0

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	2

+	DB	2

+	DB	4

+	DB	0

+	DB	0

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	2

+	DB	2

+	DB	4

+	DB	0

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	2

+	DB	2

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	2

+	DB	2

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	2

+	DB	2

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	2

+	DB	2

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	4

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	XDEF _block_5_data

+;    1	// convpng v7.0

+;    2	#include <stdint.h>

+;    3	#include "logo_gfx.h"

+;    4	

+;    5	// 8 bpp image

+;    6	uint8_t block_5_data[83] = {

+	END

diff --git a/frontends/calculator/obj/gfx/block_6.src b/frontends/calculator/obj/gfx/block_6.src
new file mode 100644
index 0000000..7ae3009
--- /dev/null
+++ b/frontends/calculator/obj/gfx/block_6.src
@@ -0,0 +1,98 @@
+; Zilog eZ80 ANSI C Compiler Release 3.4

+; -optsize -noreduceopt -nomodsect -peephole -globalopt

+; -localcse -const=ROM 

+	FILE	"SRC\GFX\BLOCK_6.C"

+	.assume ADL=1

+	SEGMENT DATA

+_block_6_data:

+	DB	9

+	DB	9

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	0

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	6

+	DB	0

+	DB	0

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	6

+	DB	0

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	6

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	XDEF _block_6_data

+;    1	// convpng v7.0

+;    2	#include <stdint.h>

+;    3	#include "logo_gfx.h"

+;    4	

+;    5	// 8 bpp image

+;    6	uint8_t block_6_data[83] = {

+	END

diff --git a/frontends/calculator/obj/gfx/block_7.src b/frontends/calculator/obj/gfx/block_7.src
new file mode 100644
index 0000000..fc945cd
--- /dev/null
+++ b/frontends/calculator/obj/gfx/block_7.src
@@ -0,0 +1,98 @@
+; Zilog eZ80 ANSI C Compiler Release 3.4

+; -optsize -noreduceopt -nomodsect -peephole -globalopt

+; -localcse -const=ROM 

+	FILE	"SRC\GFX\BLOCK_7.C"

+	.assume ADL=1

+	SEGMENT DATA

+_block_7_data:

+	DB	9

+	DB	9

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	0

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	2

+	DB	2

+	DB	1

+	DB	0

+	DB	0

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	2

+	DB	2

+	DB	1

+	DB	0

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	2

+	DB	2

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	2

+	DB	2

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	2

+	DB	2

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	2

+	DB	2

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	1

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	DB	2

+	XDEF _block_7_data

+;    1	// convpng v7.0

+;    2	#include <stdint.h>

+;    3	#include "logo_gfx.h"

+;    4	

+;    5	// 8 bpp image

+;    6	uint8_t block_7_data[83] = {

+	END

diff --git a/frontends/calculator/obj/gfx/logo_gfx.src b/frontends/calculator/obj/gfx/logo_gfx.src
new file mode 100644
index 0000000..673beca
--- /dev/null
+++ b/frontends/calculator/obj/gfx/logo_gfx.src
@@ -0,0 +1,22 @@
+; Zilog eZ80 ANSI C Compiler Release 3.4

+; -optsize -noreduceopt -nomodsect -peephole -globalopt

+; -localcse -const=ROM 

+	FILE	"SRC\GFX\LOGO_GFX.C"

+	.assume ADL=1

+	SEGMENT DATA

+_logo_gfx_pal:

+	DW	65535

+	DW	62052

+	DW	0

+	DW	52356

+	DW	14527

+	DW	8479

+	DW	41840

+	DW	22671

+	XDEF _logo_gfx_pal

+;    1	// convpng v7.0

+;    2	#include <stdint.h>

+;    3	#include "logo_gfx.h"

+;    4	

+;    5	uint16_t logo_gfx_pal[8] = {

+	END

diff --git a/frontends/calculator/obj/main.src b/frontends/calculator/obj/main.src
new file mode 100644
index 0000000..8897b9b
--- /dev/null
+++ b/frontends/calculator/obj/main.src
@@ -0,0 +1,172 @@
+; Zilog eZ80 ANSI C Compiler Release 3.4

+; -optsize -noreduceopt -nomodsect -peephole -globalopt

+; -localcse -const=ROM 

+	FILE	"SRC\MAIN.C"

+	.assume ADL=1

+	SEGMENT CODE

+;    1	#include <stdbool.h>

+;    2	#include <stddef.h>

+;    3	#include <stdint.h>

+;    4	#include <tice.h>

+;    5	

+;    6	#include <math.h>

+;    7	#include <stdio.h>

+;    8	#include <stdlib.h>

+;    9	#include <string.h>

+;   10	

+;   11	#include <graphx.h>

+;   12	

+;   13	#include "cetris.h"

+;   14	

+;   15	/* Include the sprite data */

+;   16	#include "gfx/logo_gfx.h"

+;   17	

+;   18	void main(void) {

+_main:

+;   19	    /* Initialize the 8bpp graphics */

+;   20	    gfx_Begin();

+	CALL	_gfx_Begin

+;   21	

+;   22	    /* Set up the palette for our sprites */

+;   23	    gfx_SetPalette(logo_gfx_pal, sizeof_logo_gfx_pal, 0);

+	LD	BC,0

+	PUSH	BC

+	LD	BC,16

+	PUSH	BC

+	LD	BC,_logo_gfx_pal

+	PUSH	BC

+	CALL	_gfx_SetPalette

+	POP	BC

+	POP	BC

+	POP	BC

+;   24	

+;   25	    /* Fill the screen with color index 0 */

+;   26	    gfx_FillScreen(0);

+	LD	BC,0

+	PUSH	BC

+	CALL	_gfx_FillScreen

+	POP	BC

+;   27	

+;   28	    /* Draw a bunch of different styled sprites on the screen */

+;   29	    gfx_Sprite(block_1, 0, 0);

+	LD	BC,0

+	PUSH	BC

+	PUSH	BC

+	LD	BC,_block_1_data

+	PUSH	BC

+	CALL	_gfx_Sprite

+	POP	BC

+	POP	BC

+	POP	BC

+;   30	    gfx_Sprite_NoClip(block_1, 32, 32);

+	LD	BC,32

+	PUSH	BC

+	PUSH	BC

+	LD	BC,_block_1_data

+	PUSH	BC

+	CALL	_gfx_Sprite_NoClip

+	POP	BC

+	POP	BC

+	POP	BC

+;   31	    gfx_TransparentSprite(block_1, 64, 64);

+	LD	BC,64

+	PUSH	BC

+	PUSH	BC

+	LD	BC,_block_1_data

+	PUSH	BC

+	CALL	_gfx_TransparentSprite

+	POP	BC

+	POP	BC

+	POP	BC

+;   32	    gfx_TransparentSprite_NoClip(block_1, 96, 96);

+	LD	BC,96

+	PUSH	BC

+	PUSH	BC

+	LD	BC,_block_1_data

+	PUSH	BC

+	CALL	_gfx_TransparentSprite_NoClip

+	POP	BC

+	POP	BC

+	POP	BC

+;   33	    gfx_ScaledSprite_NoClip(block_1, 128, 128, 2, 2);

+	LD	BC,2

+	PUSH	BC

+	PUSH	BC

+	LD	BC,128

+	PUSH	BC

+	PUSH	BC

+	LD	BC,_block_1_data

+	PUSH	BC

+	CALL	_gfx_ScaledSprite_NoClip

+	POP	BC

+	POP	BC

+	POP	BC

+	POP	BC

+	POP	BC

+;   34	    gfx_ScaledTransparentSprite_NoClip(block_1, 128, 0, 3, 3);

+	LD	BC,3

+	PUSH	BC

+	PUSH	BC

+	LD	BC,0

+	PUSH	BC

+	LD	BC,128

+	PUSH	BC

+	LD	BC,_block_1_data

+	PUSH	BC

+	CALL	_gfx_ScaledTransparentSprite_NoClip

+	POP	BC

+	POP	BC

+	POP	BC

+	POP	BC

+	POP	BC

+;   35	

+;   36	    /* Wait for a key to be pressed */

+;   37	    while (!os_GetCSC());

+L_1:

+	CALL	_os_GetCSC

+	OR	A,A

+	JR	Z,L_1

+;   38	

+;   39	    /* Close the graphics */

+;   40	    gfx_End();

+	CALL	_gfx_End

+;   41	}

+	RET	

+

+

+;**************************** _main ***************************

+;Name                         Addr/Register   Size   Type

+;_gfx_End                            IMPORT  -----   function

+;_os_GetCSC                          IMPORT  -----   function

+;_gfx_ScaledTransparentSprite_NoClip      IMPORT  -----   function

+;_gfx_ScaledSprite_NoClip            IMPORT  -----   function

+;_gfx_TransparentSprite_NoClip       IMPORT  -----   function

+;_gfx_TransparentSprite              IMPORT  -----   function

+;_gfx_Sprite_NoClip                  IMPORT  -----   function

+;_block_1_data                       IMPORT     83   variable

+;_gfx_Sprite                         IMPORT  -----   function

+;_gfx_FillScreen                     IMPORT  -----   function

+;_logo_gfx_pal                       IMPORT     16   variable

+;_gfx_SetPalette                     IMPORT  -----   function

+;_gfx_Begin                          IMPORT  -----   function

+

+

+; Stack Frame Size: 6 (bytes)

+;       Spill Code: 0 (instruction)

+

+

+	XREF _logo_gfx_pal:ROM

+	XREF _block_1_data:ROM

+	XREF _gfx_ScaledTransparentSprite_NoClip:ROM

+	XREF _gfx_ScaledSprite_NoClip:ROM

+	XREF _gfx_TransparentSprite_NoClip:ROM

+	XREF _gfx_TransparentSprite:ROM

+	XREF _gfx_Sprite_NoClip:ROM

+	XREF _gfx_Sprite:ROM

+	XREF _gfx_FillScreen:ROM

+	XREF _gfx_SetPalette:ROM

+	XREF _gfx_End:ROM

+	XREF _gfx_Begin:ROM

+	XREF _os_GetCSC:ROM

+	XDEF _main

+	END

diff --git a/frontends/calculator/src/cetris.c b/frontends/calculator/src/cetris.c
new file mode 120000
index 0000000..ecbdb48
--- /dev/null
+++ b/frontends/calculator/src/cetris.c
@@ -0,0 +1 @@
+../../../core/src/cetris.c
\ No newline at end of file
diff --git a/frontends/calculator/src/cetris.h b/frontends/calculator/src/cetris.h
new file mode 120000
index 0000000..37329b2
--- /dev/null
+++ b/frontends/calculator/src/cetris.h
@@ -0,0 +1 @@
+../../../core/include/cetris.h
\ No newline at end of file
diff --git a/frontends/calculator/src/gfx/block_1.c b/frontends/calculator/src/gfx/block_1.c
new file mode 100644
index 0000000..58d58d3
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_1.c
@@ -0,0 +1,17 @@
+// convpng v7.0
+#include <stdint.h>
+#include "logo_gfx.h"
+
+// 8 bpp image
+uint8_t block_1_data[83] = {
+ 9,9,  // width,height
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+ 0x02,0x00,0x05,0x05,0x05,0x05,0x05,0x05,0x02,
+ 0x02,0x05,0x00,0x00,0x05,0x05,0x05,0x05,0x02,
+ 0x02,0x05,0x00,0x05,0x05,0x05,0x05,0x05,0x02,
+ 0x02,0x05,0x05,0x05,0x05,0x05,0x05,0x05,0x02,
+ 0x02,0x05,0x05,0x05,0x05,0x05,0x05,0x05,0x02,
+ 0x02,0x05,0x05,0x05,0x05,0x05,0x05,0x05,0x02,
+ 0x02,0x05,0x05,0x05,0x05,0x05,0x05,0x05,0x02,
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+};
diff --git a/frontends/calculator/src/gfx/block_1.png b/frontends/calculator/src/gfx/block_1.png
new file mode 100644
index 0000000..295821e
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_1.png
diff --git a/frontends/calculator/src/gfx/block_2.c b/frontends/calculator/src/gfx/block_2.c
new file mode 100644
index 0000000..47c16cb
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_2.c
@@ -0,0 +1,17 @@
+// convpng v7.0
+#include <stdint.h>
+#include "logo_gfx.h"
+
+// 8 bpp image
+uint8_t block_2_data[83] = {
+ 9,9,  // width,height
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+ 0x02,0x00,0x07,0x07,0x07,0x07,0x07,0x07,0x02,
+ 0x02,0x07,0x00,0x00,0x07,0x07,0x07,0x07,0x02,
+ 0x02,0x07,0x00,0x07,0x07,0x07,0x07,0x07,0x02,
+ 0x02,0x07,0x07,0x07,0x07,0x07,0x07,0x07,0x02,
+ 0x02,0x07,0x07,0x07,0x07,0x07,0x07,0x07,0x02,
+ 0x02,0x07,0x07,0x07,0x07,0x07,0x07,0x07,0x02,
+ 0x02,0x07,0x07,0x07,0x07,0x07,0x07,0x07,0x02,
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+};
diff --git a/frontends/calculator/src/gfx/block_2.png b/frontends/calculator/src/gfx/block_2.png
new file mode 100644
index 0000000..29443db
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_2.png
diff --git a/frontends/calculator/src/gfx/block_3.c b/frontends/calculator/src/gfx/block_3.c
new file mode 100644
index 0000000..798215c
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_3.c
@@ -0,0 +1,17 @@
+// convpng v7.0
+#include <stdint.h>
+#include "logo_gfx.h"
+
+// 8 bpp image
+uint8_t block_3_data[83] = {
+ 9,9,  // width,height
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+ 0x02,0x00,0x06,0x06,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x06,0x00,0x00,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x06,0x00,0x06,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x06,0x06,0x06,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x06,0x06,0x06,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x06,0x06,0x06,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x06,0x06,0x06,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+};
diff --git a/frontends/calculator/src/gfx/block_3.png b/frontends/calculator/src/gfx/block_3.png
new file mode 100644
index 0000000..a4b6dfd
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_3.png
diff --git a/frontends/calculator/src/gfx/block_4.c b/frontends/calculator/src/gfx/block_4.c
new file mode 100644
index 0000000..517aff2
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_4.c
@@ -0,0 +1,17 @@
+// convpng v7.0
+#include <stdint.h>
+#include "logo_gfx.h"
+
+// 8 bpp image
+uint8_t block_4_data[83] = {
+ 9,9,  // width,height
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+ 0x02,0x00,0x03,0x03,0x03,0x03,0x03,0x03,0x02,
+ 0x02,0x03,0x00,0x00,0x03,0x03,0x03,0x03,0x02,
+ 0x02,0x03,0x00,0x03,0x03,0x03,0x03,0x03,0x02,
+ 0x02,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x02,
+ 0x02,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x02,
+ 0x02,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x02,
+ 0x02,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x02,
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+};
diff --git a/frontends/calculator/src/gfx/block_4.png b/frontends/calculator/src/gfx/block_4.png
new file mode 100644
index 0000000..e5b977e
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_4.png
diff --git a/frontends/calculator/src/gfx/block_5.c b/frontends/calculator/src/gfx/block_5.c
new file mode 100644
index 0000000..073b138
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_5.c
@@ -0,0 +1,17 @@
+// convpng v7.0
+#include <stdint.h>
+#include "logo_gfx.h"
+
+// 8 bpp image
+uint8_t block_5_data[83] = {
+ 9,9,  // width,height
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+ 0x02,0x00,0x04,0x04,0x04,0x04,0x04,0x04,0x02,
+ 0x02,0x04,0x00,0x00,0x04,0x04,0x04,0x04,0x02,
+ 0x02,0x04,0x00,0x04,0x04,0x04,0x04,0x04,0x02,
+ 0x02,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x02,
+ 0x02,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x02,
+ 0x02,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x02,
+ 0x02,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x02,
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+};
diff --git a/frontends/calculator/src/gfx/block_5.png b/frontends/calculator/src/gfx/block_5.png
new file mode 100644
index 0000000..a63802c
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_5.png
diff --git a/frontends/calculator/src/gfx/block_6.c b/frontends/calculator/src/gfx/block_6.c
new file mode 100644
index 0000000..4decd9b
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_6.c
@@ -0,0 +1,17 @@
+// convpng v7.0
+#include <stdint.h>
+#include "logo_gfx.h"
+
+// 8 bpp image
+uint8_t block_6_data[83] = {
+ 9,9,  // width,height
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+ 0x02,0x00,0x06,0x06,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x06,0x00,0x00,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x06,0x00,0x06,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x06,0x06,0x06,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x06,0x06,0x06,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x06,0x06,0x06,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x06,0x06,0x06,0x06,0x06,0x06,0x06,0x02,
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+};
diff --git a/frontends/calculator/src/gfx/block_6.png b/frontends/calculator/src/gfx/block_6.png
new file mode 100644
index 0000000..a4b6dfd
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_6.png
diff --git a/frontends/calculator/src/gfx/block_7.c b/frontends/calculator/src/gfx/block_7.c
new file mode 100644
index 0000000..67122d1
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_7.c
@@ -0,0 +1,17 @@
+// convpng v7.0
+#include <stdint.h>
+#include "logo_gfx.h"
+
+// 8 bpp image
+uint8_t block_7_data[83] = {
+ 9,9,  // width,height
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+ 0x02,0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x02,
+ 0x02,0x01,0x00,0x00,0x01,0x01,0x01,0x01,0x02,
+ 0x02,0x01,0x00,0x01,0x01,0x01,0x01,0x01,0x02,
+ 0x02,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x02,
+ 0x02,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x02,
+ 0x02,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x02,
+ 0x02,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x02,
+ 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
+};
diff --git a/frontends/calculator/src/gfx/block_7.png b/frontends/calculator/src/gfx/block_7.png
new file mode 100644
index 0000000..8cb6da8
--- /dev/null
+++ b/frontends/calculator/src/gfx/block_7.png
diff --git a/frontends/calculator/src/gfx/convpng.ini b/frontends/calculator/src/gfx/convpng.ini
new file mode 100644
index 0000000..fcf7193
--- /dev/null
+++ b/frontends/calculator/src/gfx/convpng.ini
@@ -0,0 +1,10 @@
+#GroupC            : logo_gfx
+#TransparentColor  : 255,255,255
+#PNGImages         :
+  block_1
+  block_2
+  block_3
+  block_4
+  block_5
+  block_6
+  block_7
diff --git a/frontends/calculator/src/gfx/convpng.log b/frontends/calculator/src/gfx/convpng.log
new file mode 100644
index 0000000..538c0d0
--- /dev/null
+++ b/frontends/calculator/src/gfx/convpng.log
@@ -0,0 +1,20 @@
+opened convpng.ini
+
+--- logo_gfx (C) ---
+building palette with [256] available indices ...
+built palette with [8] indices.
+palette quality : 100.00%
+transparent color index : 0
+transparent color : 0xFFFF
+7:
+ block_1 : 100.00%
+ block_2 : 100.00%
+ block_3 : 100.00%
+ block_4 : 100.00%
+ block_5 : 100.00%
+ block_6 : 100.00%
+ block_7 : 100.00%
+
+converted in 0 s
+
+finished!
diff --git a/frontends/calculator/src/gfx/logo_gfx.c b/frontends/calculator/src/gfx/logo_gfx.c
new file mode 100644
index 0000000..3509c0e
--- /dev/null
+++ b/frontends/calculator/src/gfx/logo_gfx.c
@@ -0,0 +1,14 @@
+// convpng v7.0
+#include <stdint.h>
+#include "logo_gfx.h"
+
+uint16_t logo_gfx_pal[8] = {
+ 0xFFFF,  // 00 :: rgb(255,255,255)
+ 0xF264,  // 01 :: rgb(231,156,33)
+ 0x0000,  // 02 :: rgb(0,0,0)
+ 0xCC84,  // 03 :: rgb(160,35,30)
+ 0x38BF,  // 04 :: rgb(115,41,255)
+ 0x211F,  // 05 :: rgb(66,66,255)
+ 0xA370,  // 06 :: rgb(66,222,132)
+ 0x588F,  // 07 :: rgb(181,33,123)
+};
\ No newline at end of file
diff --git a/frontends/calculator/src/gfx/logo_gfx.h b/frontends/calculator/src/gfx/logo_gfx.h
new file mode 100644
index 0000000..02714e5
--- /dev/null
+++ b/frontends/calculator/src/gfx/logo_gfx.h
@@ -0,0 +1,47 @@
+// convpng v7.0
+// this file contains all the graphics sources for easy inclusion in a project
+#ifndef __logo_gfx__
+#define __logo_gfx__
+#include <stdint.h>
+
+#define logo_gfx_transparent_color_index 0
+
+#define block_1_width 9
+#define block_1_height 9
+#define block_1_size 83
+extern uint8_t block_1_data[83];
+#define block_1 ((gfx_sprite_t*)block_1_data)
+#define block_2_width 9
+#define block_2_height 9
+#define block_2_size 83
+extern uint8_t block_2_data[83];
+#define block_2 ((gfx_sprite_t*)block_2_data)
+#define block_3_width 9
+#define block_3_height 9
+#define block_3_size 83
+extern uint8_t block_3_data[83];
+#define block_3 ((gfx_sprite_t*)block_3_data)
+#define block_4_width 9
+#define block_4_height 9
+#define block_4_size 83
+extern uint8_t block_4_data[83];
+#define block_4 ((gfx_sprite_t*)block_4_data)
+#define block_5_width 9
+#define block_5_height 9
+#define block_5_size 83
+extern uint8_t block_5_data[83];
+#define block_5 ((gfx_sprite_t*)block_5_data)
+#define block_6_width 9
+#define block_6_height 9
+#define block_6_size 83
+extern uint8_t block_6_data[83];
+#define block_6 ((gfx_sprite_t*)block_6_data)
+#define block_7_width 9
+#define block_7_height 9
+#define block_7_size 83
+extern uint8_t block_7_data[83];
+#define block_7 ((gfx_sprite_t*)block_7_data)
+#define sizeof_logo_gfx_pal 16
+extern uint16_t logo_gfx_pal[8];
+
+#endif
diff --git a/frontends/calculator/src/input.c b/frontends/calculator/src/input.c
new file mode 120000
index 0000000..5b377ca
--- /dev/null
+++ b/frontends/calculator/src/input.c
@@ -0,0 +1 @@
+../../../core/src/input.c
\ No newline at end of file
diff --git a/frontends/calculator/src/input.h b/frontends/calculator/src/input.h
new file mode 120000
index 0000000..d569ad2
--- /dev/null
+++ b/frontends/calculator/src/input.h
@@ -0,0 +1 @@
+../../../core/include/input.h
\ No newline at end of file
diff --git a/frontends/calculator/src/main.c b/frontends/calculator/src/main.c
new file mode 100644
index 0000000..535f431
--- /dev/null
+++ b/frontends/calculator/src/main.c
@@ -0,0 +1,41 @@
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <tice.h>
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <graphx.h>
+
+#include "cetris.h"
+
+/* Include the sprite data */
+#include "gfx/logo_gfx.h"
+
+void main(void) {
+    /* Initialize the 8bpp graphics */
+    gfx_Begin();
+
+    /* Set up the palette for our sprites */
+    gfx_SetPalette(logo_gfx_pal, sizeof_logo_gfx_pal, 0);
+
+    /* Fill the screen with color index 0 */
+    gfx_FillScreen(0);
+
+    /* Draw a bunch of different styled sprites on the screen */
+    gfx_Sprite(block_1, 0, 0);
+    gfx_Sprite_NoClip(block_1, 32, 32);
+    gfx_TransparentSprite(block_1, 64, 64);
+    gfx_TransparentSprite_NoClip(block_1, 96, 96);
+    gfx_ScaledSprite_NoClip(block_1, 128, 128, 2, 2);
+    gfx_ScaledTransparentSprite_NoClip(block_1, 128, 0, 3, 3);
+
+    /* Wait for a key to be pressed */
+    while (!os_GetCSC());
+
+    /* Close the graphics */
+    gfx_End();
+}
diff --git a/frontends/calculator/src/matrix.c b/frontends/calculator/src/matrix.c
new file mode 120000
index 0000000..9a72a36
--- /dev/null
+++ b/frontends/calculator/src/matrix.c
@@ -0,0 +1 @@
+../../../core/src/matrix.c
\ No newline at end of file
diff --git a/frontends/calculator/src/matrix.h b/frontends/calculator/src/matrix.h
new file mode 120000
index 0000000..0b441d9
--- /dev/null
+++ b/frontends/calculator/src/matrix.h
@@ -0,0 +1 @@
+../../../core/include/matrix.h
\ No newline at end of file
diff --git a/frontends/calculator/src/types.h b/frontends/calculator/src/types.h
new file mode 120000
index 0000000..65216e0
--- /dev/null
+++ b/frontends/calculator/src/types.h
@@ -0,0 +1 @@
+../../../core/include/types.h
\ No newline at end of file
diff --git a/frontends/curses/curses_ui.c b/frontends/curses/curses_ui.c
index 1f1440c..5557ed9 100644
--- a/frontends/curses/curses_ui.c
+++ b/frontends/curses/curses_ui.c
@@ -66,7 +66,7 @@
 #define X_OFFSET 8

 #define Y_OFFSET 0

 

-struct cetris_game game;

+cetris_game game;

 

 void curses_init() {

   setlocale(LC_CTYPE, "");

@@ -119,7 +119,7 @@ void draw_board() {
       }

       if (game.board[x][y].occupied) {

 	      attron(COLOR_PAIR(game.board[x][y].c) | A_BOLD);

-        if (game.board[0][y].remove_tick > 0) {

+        if (game.board[0][y].remove_tick) {

           if (game.tick % 2 == 0) {

             mvaddstr((y) + 1, x * 2 + X_OFFSET, BLOCK);

           }

@@ -148,7 +148,7 @@ void draw_board() {
     attron(A_BOLD);

 

     char score[50];

-    sprintf(score, "%li", game.score);

+    sprintf(score, "%i", game.score);

     mvaddstr(1, (39 + X_OFFSET) - strlen(score), score);

 

     char level[20];

diff --git a/frontends/gl/main.c b/frontends/gl/main.c
index a105290..1cab197 100644
--- a/frontends/gl/main.c
+++ b/frontends/gl/main.c
@@ -188,7 +188,7 @@ int main(void) {
   struct block_drawable block;

   create_block(&block);

 

-  struct cetris_game cetris;

+  cetris_game cetris;

   init_game(&cetris);

 

   double prev_time = glfwGetTime();