- Deixe el Abu Simbel ací per a anar fent proves de càrrega

- [NEW] Mòdul zx_tape, encara no carrega correctament les cintes.
- [CHG] Gestió completa del só pasada a la ULA, i de la pantalla a zxscreen

zx_ula.cpp

@@ -11,7 +11,7 @@ namespace zx_ula
     {
         const uint8_t *keys = SDL_GetKeyboardState(NULL);
         const uint8_t h_addr = (port>>8);
-        uint8_t result = 0xff;
+        uint8_t result = ear ? 0xbf : 0xff;
         if (!(h_addr & ~0xfe))
         {
             result &= ~( 
@@ -97,6 +97,7 @@ namespace zx_ula
 
     uint8_t get_border_color() { return border_color; }
     uint8_t get_ear() { return ear; }
+    void set_ear(const uint8_t val) { ear = val; }
 
 
 
@@ -104,6 +105,7 @@ namespace zx_ula
     SDL_AudioDeviceID sdlAudioDevice;
     uint8_t sound_buffer[1024];
     uint16_t sound_pos;
+    uint16_t t_sound=0;
 
     void audioCallback(void * userdata, uint8_t * stream, int len)
     {
@@ -128,8 +130,12 @@ namespace zx_ula
         SDL_PauseAudioDevice(sdlAudioDevice, 1);
     }
 
-    void sound_update()
+    void sound_update(const uint8_t dt)
     {
-        sound_buffer[sound_pos++] = ear*128;
+        t_sound += dt;
+        if (t_sound>=400) {
+            t_sound-=400;
+            sound_buffer[sound_pos++] = ear*128;
+        }
     }
 }