- [CHG] zx_screen pinta t_state a t_state, per a que es vegen les ralles al carregar

- [FIX] Ja carrega blocs capçalera i blocs programa. Falla el següent...

zx_ula.cpp

@@ -90,8 +90,8 @@ namespace zx_ula
     void port_out(int port, int val)
     {
         border_color = val & 0x7;
-        mic = (val>>3)&0x1;
-        ear = (val>>4)&0x1;
+        mic = (val&0x08)==0;
+        ear = val&0x10;
         //printf("EAR:%i MIC:%i\n", ear, mic);
     }
 
@@ -111,6 +111,7 @@ namespace zx_ula
     {
         const uint16_t top = sound_pos < len ? sound_pos : len;
         memcpy(stream, sound_buffer, top);
+        if (top<len) memchr(&stream[top], sound_buffer[top-1], len-top);
         sound_pos=0;
     }
 
@@ -133,8 +134,8 @@ namespace zx_ula
     void sound_update(const uint8_t dt)
     {
         t_sound += dt;
-        if (t_sound>=400) {
-            t_sound-=400;
+        if (t_sound>=317) {
+            t_sound-=317;
             sound_buffer[sound_pos++] = ear*128;
         }
     }