Feature: Implemented various instructions

4 files changed, 42 insertions, 14 deletions

diff --git a/config.h b/config.h
index 1656026..b318965 100644
--- a/config.h
+++ b/config.h
@@ -6,13 +6,13 @@
 #define SCREEN_WIDTH 852
 #define SCREEN_HEIGHT 480
 
-#define INSTRUCTIONS_PER_SECOND 700
-#define TIMERS_THREAD_FREQUENCY 60
+#define INSTRUCTIONS_PER_SECOND 700 //Default: 700
+#define TIMERS_THREAD_FREQUENCY 60 //Default: 60
 #define GAME_LOAD_LOCATION 0x200
 #define FONT_LOAD_LOCATION 0x50
 
-#define FOREGROUND_COLOR 0x00FFFFFF
-#define BLACKGROUND_COLOR 0xFF000000
+#define FOREGROUND_COLOR 0x00F00FFF //Default: 0x00FFFFFF
+#define BLACKGROUND_COLOR 0xFF000000 //Default: 0xFF000000
 
 #define dbgprintf(fmt, ...) \
      do { if(DEBUG) fprintf (stdout, fmt, ##__VA_ARGS__); } while(0)
diff --git a/emulator.c b/emulator.c
index 7f6bdd6..5c83226 100644
--- a/emulator.c
+++ b/emulator.c
@@ -28,7 +28,9 @@ int emulator_initialise(Emulator* emulator)
     memset(emulator, 0, sizeof(Emulator));
 
     memcpy(emulator->memory + FONT_LOAD_LOCATION, font, sizeof(font));
+
     emulator->is_on = 1;
+
     emulator->keys[0].value = 'x'; //O
     emulator->keys[1].value = '1'; //1
     emulator->keys[2].value = '2'; //2
@@ -46,7 +48,6 @@ int emulator_initialise(Emulator* emulator)
     emulator->keys[14].value = 'f'; //E
     emulator->keys[15].value = 'v'; //F
 
-
     pthread_t emulator_timers_thread_id;
     pthread_create(&emulator_timers_thread_id, NULL, &emulator_timers_thread, emulator);
 
@@ -87,7 +88,7 @@ int emulator_handle_key_press(Emulator* emulator, uint8_t key)
     {
         if(emulator->keys[i].value == key)
         {
-            printf("KEY ACTIVATED: %c-%d!\n", key, key);
+            dbgprintf("KEY ACTIVATED: %c-%d!\n", key, key);
             emulator->keys[i].activated = 1;
             break;
         }
@@ -102,7 +103,7 @@ int emulator_handle_key_release(Emulator* emulator, uint8_t key)
     {
         if(emulator->keys[i].value == key)
         {
-            printf("KEY RELEASE: %c-%d!\n", key, key);
+            dbgprintf("KEY RELEASE: %c-%d!\n", key, key);
             emulator->keys[i].activated = 0;
             break;
         }
@@ -292,8 +293,18 @@ int emulator_tick(Emulator* emulator)
             emulator->draw_flag = 1;
             break;
         case 0xE:
-        printf("TODO: Instr: 0x%x\n", instr);
-        assert(0);
+            switch(NN)
+            {
+                case 0xA1:
+                    //skip if key not pressed
+                    if(emulator->keys[emulator->regs.V[X]].activated == 0)
+                        *pc += 2;
+                    break;
+                default:
+                    printf("DEFAULT: Instr: 0x%x\n", instr);
+                    assert(0);
+            }
+
             break;
         case 0xF:
             switch(NN)
@@ -324,6 +335,21 @@ int emulator_tick(Emulator* emulator)
                 dbgprintf("SET V[X] TO THE DELAY TIMER!\n");
                 emulator->regs.V[X] = emulator->delay_timer;
                 break;
+            case 0x18: //FX18
+                dbgprintf("SET THE SOUND TIMER TO V[X]!\n");
+                emulator->sound_timer = emulator->regs.V[X];
+                break;
+            case 0x33: //FX33
+            {
+                uint8_t number = emulator->regs.V[X];
+                for(uint8_t offset = 2; number > 0; --offset)
+                {
+                    emulator->memory[emulator->regs.I + offset] = number % 10; //last digit
+                    number /= 10;
+                }
+
+                break;
+            }
             case 0x0A:
             {
                 uint8_t key_pressed = 0;
@@ -375,15 +401,16 @@ void* emulator_timers_thread(Emulator* emulator)
     while(emulator->is_on)
     {
         if(emulator->delay_timer > 0)
+        {
+            printf("lower timer!\n");
             --emulator->delay_timer;
+        }
 
         if(emulator->sound_timer > 0)
-        {
-            printf("lower timer!\n");
             --emulator->sound_timer;
-        }
 
-        usleep(1000000 / TIMERS_THREAD_FREQUENCY);
+        if(!DEBUG)
+            usleep(1000000 / TIMERS_THREAD_FREQUENCY);
     }
 
     return NULL;
diff --git a/main.c b/main.c
index 449efda..6bde0e1 100644
--- a/main.c
+++ b/main.c
@@ -76,7 +76,8 @@ int main(int argc, char** argv)
             emulator.draw_flag = 0;
         }
 
-        //usleep(1000000 / INSTRUCTIONS_PER_SECOND);
+        if(!DEBUG)
+            usleep(1000000 / INSTRUCTIONS_PER_SECOND);
     }
 
     exit:
diff --git a/roms/life.ch8 b/roms/life.ch8
new file mode 100644
index 0000000..d35039a
--- /dev/null
+++ b/roms/life.ch8
Binary files differ