diff --git a/src/kernel/exception.rs b/src/kernel/exception.rs
index 67a2026..4009d8a 100644
--- a/src/kernel/exception.rs
+++ b/src/kernel/exception.rs
@@ -1,6 +1,7 @@
 use std::{cell::RefCell, rc::Rc};
 
 use crate::{simulator::{machine::{ExceptionType, Machine}, error::{MachineOk, MachineError}}};
+use crate::kernel::synch::Semaphore;
 
 use super::{system::System, thread::Thread};
 
@@ -172,7 +173,7 @@ fn syscall(machine: &mut Machine, system: &mut System) -> Result<MachineOk, Mach
         SC_PERROR => todo!(),
         SC_P => sc_p(machine, system),
         SC_V => sc_v(machine, system),
-        SC_SEM_CREATE => sc_sem_create(machine),
+        SC_SEM_CREATE => sc_sem_create(machine, system),
         SC_SEM_DESTROY => todo!(),
         SC_LOCK_CREATE => todo!(),
         SC_LOCK_DESTROY => todo!(),
@@ -206,14 +207,17 @@ fn sc_v(machine: &mut Machine, system: &mut System) -> Result<MachineOk, Machine
     system.get_thread_manager().sem_v(id_sema as i32, machine)
 }
 
-fn sc_sem_create(machine: &mut Machine) -> Result<MachineOk, MachineError> {
+fn sc_sem_create(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError> {
     let addr_name = machine.read_int_register(10) as usize;
-    let initial_count = machine.read_int_register(11);
+    let initial_count = machine.read_int_register(11) as i32;
     let size = get_length_param(addr_name as usize, machine);
     let _name = get_string_param(addr_name, size, machine);
     match initial_count < 0 {
         true => Err(format!("Initial_count < 0"))?,
-        false => Ok(MachineOk::Ok)
+        false => {
+            system.get_thread_manager().get_obj_addrs().add_semaphore(Semaphore::new(initial_count));
+            Ok(MachineOk::Ok)
+        }
     }
 }