feat(pic): mask all PIC except keyboard

k/pic.c

@@ -20,5 +20,9 @@ void remap_pic(void)
     outb(SLAVE_PORT_B, ICW4_INIT);
 
     // OCW1
-    outb(MASTER_PORT_B, PIC_PIN_0); // masking PIT for now
+    outb(MASTER_PORT_B, PIC_PIN_0 | PIC_PIN_2 |
+                        PIC_PIN_3 | PIC_PIN_4 | PIC_PIN_5 |
+                        PIC_PIN_6 | PIC_PIN_7); // masking PIT for now
+
+    asm volatile("sti");
 }

k/serial.c

@@ -30,7 +30,7 @@ int write(const char *buf, size_t count)
     {
         u8 line_status = inb(COM1 + 5);
         if (!(line_status & EMPTY_TRANSMITTER))
-            break;
+            continue;
         outb(COM1, buf[sent]);
     }