diff --git a/Changelog.md b/Changelog.md
index a493374..e34a201 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,10 @@
 # Changelog
 
+[0.2.1]
+
+- Added support for `loadSlot` and `setSlot`
+- Fixed bug where syscalls like `max(1, 2)` were not allowed in assignment expressions
+
 [0.2.0]
 
 - Completely re-wrote the tokenizer to use `logos`
diff --git a/ModData/About/About.xml b/ModData/About/About.xml
index 98e8f46..8c0bca7 100644
--- a/ModData/About/About.xml
+++ b/ModData/About/About.xml
@@ -2,7 +2,7 @@
 <ModMetadata xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <Name>Slang</Name>
   <Author>JoeDiertay</Author>
-  <Version>0.2.0</Version>
+  <Version>0.2.1</Version>
   <Description>
 [h1]Slang: High-Level Programming for Stationeers[/h1]
 
diff --git a/csharp_mod/stationeersSlang.csproj b/csharp_mod/stationeersSlang.csproj
index f519032..91024c0 100644
--- a/csharp_mod/stationeersSlang.csproj
+++ b/csharp_mod/stationeersSlang.csproj
@@ -5,7 +5,7 @@
     <Nullable>enable</Nullable>
     <AssemblyName>StationeersSlang</AssemblyName>
     <Description>Slang Compiler Bridge</Description>
-    <Version>0.2.0</Version>
+    <Version>0.2.1</Version>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <LangVersion>latest</LangVersion>
   </PropertyGroup>
diff --git a/rust_compiler/Cargo.lock b/rust_compiler/Cargo.lock
index 6867837..2c1e541 100644
--- a/rust_compiler/Cargo.lock
+++ b/rust_compiler/Cargo.lock
@@ -909,7 +909,7 @@ checksum = "e3a9fe34e3e7a50316060351f37187a3f546bce95496156754b601a5fa71b76e"
 
 [[package]]
 name = "slang"
-version = "0.2.0"
+version = "0.2.1"
 dependencies = [
  "anyhow",
  "clap",
diff --git a/rust_compiler/Cargo.toml b/rust_compiler/Cargo.toml
index 8969880..6cd02a7 100644
--- a/rust_compiler/Cargo.toml
+++ b/rust_compiler/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "slang"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2021"
 
 [workspace]
diff --git a/rust_compiler/libs/compiler/src/test/math_syscall.rs b/rust_compiler/libs/compiler/src/test/math_syscall.rs
index 966a1e3..f102135 100644
--- a/rust_compiler/libs/compiler/src/test/math_syscall.rs
+++ b/rust_compiler/libs/compiler/src/test/math_syscall.rs
@@ -243,6 +243,32 @@ fn test_max() -> Result<()> {
     Ok(())
 }
 
+#[test]
+fn test_max_from_game() -> Result<()> {
+    let compiled = compile! {
+        debug
+        r#"
+        let item = 0;
+        item = max(1 + 2, 2);
+        "#
+    };
+
+    assert_eq!(
+        compiled,
+        indoc! {
+            "
+            j main
+            main:
+            move r8 0 #item
+            max r15 3 2
+            move r8 r15 #item
+            "
+        }
+    );
+
+    Ok(())
+}
+
 #[test]
 fn test_min() -> Result<()> {
     let compiled = compile! {
diff --git a/rust_compiler/libs/compiler/src/test/syscall.rs b/rust_compiler/libs/compiler/src/test/syscall.rs
index 9455cb1..a8e5b9e 100644
--- a/rust_compiler/libs/compiler/src/test/syscall.rs
+++ b/rust_compiler/libs/compiler/src/test/syscall.rs
@@ -157,3 +157,54 @@ fn test_load_from_device() -> anyhow::Result<()> {
 
     Ok(())
 }
+
+#[test]
+fn test_load_from_slot() -> anyhow::Result<()> {
+    let compiled = compile! {
+        debug
+        r#"
+        device airCon = "d0";
+
+        let setting = ls(airCon, 0, "Occupied");
+        "#
+    };
+
+    assert_eq!(
+        compiled,
+        indoc! {
+            "
+            j main
+            main:
+            ls r15 d0 0 Occupied
+            move r8 r15 #setting
+            "
+        }
+    );
+
+    Ok(())
+}
+
+#[test]
+fn test_set_slot() -> anyhow::Result<()> {
+    let compiled = compile! {
+        debug
+        r#"
+        device airCon = "d0";
+
+        ss(airCon, 0, "Occupied", true);
+        "#
+    };
+
+    assert_eq!(
+        compiled,
+        indoc! {
+            "
+            j main
+            main:
+            ss d0 0 Occupied 1
+            "
+        }
+    );
+
+    Ok(())
+}
diff --git a/rust_compiler/libs/compiler/src/v1.rs b/rust_compiler/libs/compiler/src/v1.rs
index ac3acf2..aab52ff 100644
--- a/rust_compiler/libs/compiler/src/v1.rs
+++ b/rust_compiler/libs/compiler/src/v1.rs
@@ -865,6 +865,7 @@ impl<'a, 'w, W: std::io::Write> Compiler<'a, 'w, W> {
                     scope.free_temp(c, None)?;
                 }
             }
+
             _ => {
                 return Err(Error::Unknown(
                     "Invalid assignment target. Only variables and member access are supported."
@@ -1952,6 +1953,55 @@ impl<'a, 'w, W: std::io::Write> Compiler<'a, 'w, W> {
                     temp_name: None,
                 }))
             }
+            System::LoadSlot(dev_name, slot_index, logic_type) => {
+                let (dev_hash, hash_cleanup) =
+                    self.compile_literal_or_variable(dev_name.node, scope)?;
+                let (slot_index, slot_cleanup) = self.compile_literal_or_variable(
+                    LiteralOrVariable::Literal(slot_index.node),
+                    scope,
+                )?;
+                let (logic_type, logic_cleanup) = self.compile_literal_or_variable(
+                    LiteralOrVariable::Literal(logic_type.node),
+                    scope,
+                )?;
+
+                self.write_output(format!(
+                    "ls r{} {} {} {}",
+                    VariableScope::RETURN_REGISTER,
+                    dev_hash,
+                    slot_index,
+                    logic_type
+                ))?;
+
+                cleanup!(hash_cleanup, slot_cleanup, logic_cleanup);
+
+                Ok(Some(CompilationResult {
+                    location: VariableLocation::Persistant(VariableScope::RETURN_REGISTER),
+                    temp_name: None,
+                }))
+            }
+            System::SetSlot(dev_name, slot_index, logic_type, var) => {
+                let (dev_name, name_cleanup) =
+                    self.compile_literal_or_variable(dev_name.node, scope)?;
+                let (slot_index, index_cleanup) = self.compile_literal_or_variable(
+                    LiteralOrVariable::Literal(slot_index.node),
+                    scope,
+                )?;
+                let (logic_type, type_cleanup) = self.compile_literal_or_variable(
+                    LiteralOrVariable::Literal(logic_type.node),
+                    scope,
+                )?;
+                let (var, var_cleanup) = self.compile_operand(*var, scope)?;
+
+                self.write_output(format!(
+                    "ss {} {} {} {}",
+                    dev_name, slot_index, logic_type, var
+                ))?;
+
+                cleanup!(name_cleanup, index_cleanup, type_cleanup, var_cleanup);
+
+                Ok(None)
+            }
         }
     }
 
diff --git a/rust_compiler/libs/compiler/src/variable_manager.rs b/rust_compiler/libs/compiler/src/variable_manager.rs
index 77a5c24..faf8a1a 100644
--- a/rust_compiler/libs/compiler/src/variable_manager.rs
+++ b/rust_compiler/libs/compiler/src/variable_manager.rs
@@ -52,7 +52,7 @@ pub enum LocationRequest {
     Stack,
 }
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub enum VariableLocation<'a> {
     /// Represents a temporary register (r1 - r7)
     Temporary(u8),
@@ -66,7 +66,6 @@ pub enum VariableLocation<'a> {
     Device(Cow<'a, str>),
 }
 
-// FIX: Added 'b lifetime for the parent reference
 pub struct VariableScope<'a, 'b> {
     temporary_vars: VecDeque<u8>,
     persistant_vars: VecDeque<u8>,
@@ -75,7 +74,6 @@ pub struct VariableScope<'a, 'b> {
     parent: Option<&'b VariableScope<'a, 'b>>,
 }
 
-// FIX: Updated Default impl to include 'b
 impl<'a, 'b> Default for VariableScope<'a, 'b> {
     fn default() -> Self {
         Self {
@@ -88,7 +86,6 @@ impl<'a, 'b> Default for VariableScope<'a, 'b> {
     }
 }
 
-// FIX: Updated impl block to include 'b
 impl<'a, 'b> VariableScope<'a, 'b> {
     #[allow(dead_code)]
     pub const TEMP_REGISTER_COUNT: u8 = 7;
@@ -112,7 +109,6 @@ impl<'a, 'b> VariableScope<'a, 'b> {
             })
     }
 
-    // FIX: parent is now &'b VariableScope<'a, 'b>
     pub fn scoped(parent: &'b VariableScope<'a, 'b>) -> Self {
         Self {
             parent: Option::Some(parent),
diff --git a/rust_compiler/libs/helpers/src/syscall.rs b/rust_compiler/libs/helpers/src/syscall.rs
index e859c75..5ec38c5 100644
--- a/rust_compiler/libs/helpers/src/syscall.rs
+++ b/rust_compiler/libs/helpers/src/syscall.rs
@@ -9,9 +9,11 @@ macro_rules! with_syscalls {
             "load",
             "loadBatched",
             "loadBatchedNamed",
+            "loadSlot",
             "set",
             "setBatched",
             "setBatchedNamed",
+            "setSlot",
             "acos",
             "asin",
             "atan",
@@ -32,9 +34,11 @@ macro_rules! with_syscalls {
             "l",
             "lb",
             "lbn",
+            "ls",
             "s",
             "sb",
-            "sbn"
+            "sbn",
+            "ss"
         );
     };
 }
diff --git a/rust_compiler/libs/parser/src/lib.rs b/rust_compiler/libs/parser/src/lib.rs
index 8a99e9c..bcba95d 100644
--- a/rust_compiler/libs/parser/src/lib.rs
+++ b/rust_compiler/libs/parser/src/lib.rs
@@ -645,6 +645,15 @@ impl<'a> Parser<'a> {
                 .node
                 .ok_or(Error::UnexpectedEOF)?,
 
+            TokenType::Identifier(ref id) if SysCall::is_syscall(id) => {
+                let spanned_call = self.spanned(|p| p.syscall())?;
+
+                Spanned {
+                    span: spanned_call.span,
+                    node: Expression::Syscall(spanned_call),
+                }
+            }
+
             TokenType::Identifier(_)
                 if self_matches_peek!(self, TokenType::Symbol(Symbol::LParen)) =>
             {
@@ -1050,7 +1059,9 @@ impl<'a> Parser<'a> {
 
         if token_matches!(
             temp_token,
-            TokenType::Symbol(Symbol::Semicolon) | TokenType::Symbol(Symbol::RParen)
+            TokenType::Symbol(Symbol::Semicolon)
+                | TokenType::Symbol(Symbol::RParen)
+                | TokenType::Symbol(Symbol::Comma)
         ) {
             self.tokenizer.seek(SeekFrom::Current(-1))?;
         }
@@ -1518,18 +1529,23 @@ impl<'a> Parser<'a> {
     }
 
     fn syscall(&mut self) -> Result<SysCall<'a>, Error<'a>> {
-        fn check_length<'a>(
-            span: Span,
-            arguments: &[Spanned<Expression<'a>>],
-            length: usize,
-        ) -> Result<(), Error<'a>> {
-            if arguments.len() != length {
+        let invocation = self.invocation()?;
+
+        let check_length = |len: usize| -> Result<(), Error> {
+            if invocation.arguments.len() != len {
                 return Err(Error::InvalidSyntax(
-                    span,
-                    format!("Expected {} arguments", length),
+                    self.current_span(),
+                    format!("Expected {} arguments", len),
                 ));
             }
             Ok(())
+        };
+
+        macro_rules! args {
+            ($count:expr) => {{
+                check_length($count)?;
+                invocation.arguments.into_iter()
+            }};
         }
 
         macro_rules! literal_or_variable {
@@ -1581,23 +1597,19 @@ impl<'a> Parser<'a> {
             };
         }
 
-        let invocation = self.invocation()?;
-
         match invocation.name.node.as_ref() {
             // System SysCalls
             "yield" => {
-                check_length(self.current_span(), &invocation.arguments, 0)?;
+                check_length(0)?;
                 Ok(SysCall::System(sys_call::System::Yield))
             }
             "sleep" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
-                let mut arg = invocation.arguments.into_iter();
-                let expr = arg.next().ok_or(Error::UnexpectedEOF)?;
+                let mut args = args!(1);
+                let expr = args.next().ok_or(Error::UnexpectedEOF)?;
                 Ok(SysCall::System(System::Sleep(boxed!(expr))))
             }
             "hash" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(1);
                 let lit_str = literal_or_variable!(args.next());
 
                 let Spanned {
@@ -1617,8 +1629,7 @@ impl<'a> Parser<'a> {
                 })))
             }
             "load" | "l" => {
-                check_length(self.current_span(), &invocation.arguments, 2)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(2);
 
                 let tmp = args.next();
                 let device = literal_or_variable!(tmp);
@@ -1662,8 +1673,7 @@ impl<'a> Parser<'a> {
                 )))
             }
             "loadBatched" | "lb" => {
-                check_length(self.current_span(), &invocation.arguments, 3)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(3);
                 let tmp = args.next();
                 let device_hash = literal_or_variable!(tmp);
 
@@ -1680,8 +1690,7 @@ impl<'a> Parser<'a> {
                 )))
             }
             "loadBatchedNamed" | "lbn" => {
-                check_length(self.current_span(), &invocation.arguments, 4)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(4);
                 let tmp = args.next();
                 let dev_hash = literal_or_variable!(tmp);
 
@@ -1699,8 +1708,7 @@ impl<'a> Parser<'a> {
                 )))
             }
             "set" | "s" => {
-                check_length(self.current_span(), &invocation.arguments, 3)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(3);
                 let tmp = args.next();
                 let device = literal_or_variable!(tmp);
 
@@ -1720,8 +1728,7 @@ impl<'a> Parser<'a> {
                 )))
             }
             "setBatched" | "sb" => {
-                check_length(self.current_span(), &invocation.arguments, 3)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(3);
                 let tmp = args.next();
                 let device_hash = literal_or_variable!(tmp);
 
@@ -1739,8 +1746,7 @@ impl<'a> Parser<'a> {
                 )))
             }
             "setBatchedNamed" | "sbn" => {
-                check_length(self.current_span(), &invocation.arguments, 4)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(4);
                 let tmp = args.next();
                 let device_hash = literal_or_variable!(tmp);
 
@@ -1760,30 +1766,110 @@ impl<'a> Parser<'a> {
                     expr,
                 )))
             }
+            "loadSlot" | "ls" => {
+                let mut args = args!(3);
+                let next = args.next();
+                let dev_name = literal_or_variable!(next);
+                let next = args.next();
+                let slot_index = get_arg!(Literal, literal_or_variable!(next));
+                if !matches!(
+                    slot_index,
+                    Spanned {
+                        node: Literal::Number(_),
+                        ..
+                    },
+                ) {
+                    return Err(Error::InvalidSyntax(
+                        slot_index.span,
+                        "Expected a number".to_string(),
+                    ));
+                }
+                let next = args.next();
+                let slot_logic = get_arg!(Literal, literal_or_variable!(next));
+                if !matches!(
+                    slot_logic,
+                    Spanned {
+                        node: Literal::String(_),
+                        ..
+                    }
+                ) {
+                    return Err(Error::InvalidSyntax(
+                        slot_logic.span,
+                        "Expected a String".into(),
+                    ));
+                }
+
+                Ok(SysCall::System(System::LoadSlot(
+                    dev_name, slot_index, slot_logic,
+                )))
+            }
+            "setSlot" | "ss" => {
+                let mut args = args!(4);
+                let next = args.next();
+                let dev_name = literal_or_variable!(next);
+                let next = args.next();
+                let slot_index = get_arg!(Literal, literal_or_variable!(next));
+                if !matches!(
+                    slot_index,
+                    Spanned {
+                        node: Literal::Number(_),
+                        ..
+                    }
+                ) {
+                    return Err(Error::InvalidSyntax(
+                        slot_index.span,
+                        "Expected a number".into(),
+                    ));
+                }
+                let next = args.next();
+                let slot_logic = get_arg!(Literal, literal_or_variable!(next));
+                if !matches!(
+                    slot_logic,
+                    Spanned {
+                        node: Literal::String(_),
+                        ..
+                    }
+                ) {
+                    return Err(Error::InvalidSyntax(
+                        slot_logic.span,
+                        "Expected a string".into(),
+                    ));
+                }
+                let next = args.next();
+                let expr = next.ok_or(Error::UnexpectedEOF)?;
+
+                Ok(SysCall::System(System::SetSlot(
+                    dev_name,
+                    slot_index,
+                    slot_logic,
+                    Box::new(expr),
+                )))
+            }
+
             // Math SysCalls
             "acos" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let tmp = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Acos(boxed!(tmp))))
             }
             "asin" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let tmp = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Asin(boxed!(tmp))))
             }
             "atan" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let expr = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Atan(boxed!(expr))))
             }
             "atan2" => {
-                check_length(self.current_span(), &invocation.arguments, 2)?;
+                check_length(2)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg1 = args.next().ok_or(Error::UnexpectedEOF)?;
                 let arg2 = args.next().ok_or(Error::UnexpectedEOF)?;
@@ -1791,42 +1877,42 @@ impl<'a> Parser<'a> {
                 Ok(SysCall::Math(Math::Atan2(boxed!(arg1), boxed!(arg2))))
             }
             "abs" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let expr = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Abs(boxed!(expr))))
             }
             "ceil" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Ceil(boxed!(arg))))
             }
             "cos" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Cos(boxed!(arg))))
             }
             "floor" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Floor(boxed!(arg))))
             }
             "log" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Log(boxed!(arg))))
             }
             "max" => {
-                check_length(self.current_span(), &invocation.arguments, 2)?;
+                check_length(2)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg1 = args.next().ok_or(Error::UnexpectedEOF)?;
                 let arg2 = args.next().ok_or(Error::UnexpectedEOF)?;
@@ -1834,7 +1920,7 @@ impl<'a> Parser<'a> {
                 Ok(SysCall::Math(Math::Max(boxed!(arg1), boxed!(arg2))))
             }
             "min" => {
-                check_length(self.current_span(), &invocation.arguments, 2)?;
+                check_length(2)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg1 = args.next().ok_or(Error::UnexpectedEOF)?;
                 let arg2 = args.next().ok_or(Error::UnexpectedEOF)?;
@@ -1842,32 +1928,32 @@ impl<'a> Parser<'a> {
                 Ok(SysCall::Math(Math::Min(boxed!(arg1), boxed!(arg2))))
             }
             "rand" => {
-                check_length(self.current_span(), &invocation.arguments, 0)?;
+                check_length(0)?;
                 Ok(SysCall::Math(Math::Rand))
             }
             "sin" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Sin(boxed!(arg))))
             }
             "sqrt" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Sqrt(boxed!(arg))))
             }
             "tan" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Tan(boxed!(arg))))
             }
             "trunc" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
diff --git a/rust_compiler/libs/parser/src/sys_call.rs b/rust_compiler/libs/parser/src/sys_call.rs
index e90e837..00a48ef 100644
--- a/rust_compiler/libs/parser/src/sys_call.rs
+++ b/rust_compiler/libs/parser/src/sys_call.rs
@@ -214,6 +214,30 @@ documented! {
             Spanned<Literal<'a>>,
             Box<Spanned<Expression<'a>>>,
         ),
+        /// Loads slot LogicSlotType from device into a variable
+        ///
+        /// ## IC10
+        /// `ls r0 d0 2 Occupied`
+        /// ## Slang
+        /// `let isOccupied = loadSlot(deviceHash, 2, "Occupied");`
+        /// `let isOccupied = ls(deviceHash, 2, "Occupied");`
+        LoadSlot(
+            Spanned<LiteralOrVariable<'a>>,
+            Spanned<Literal<'a>>,
+            Spanned<Literal<'a>>
+        ),
+        /// Stores a value of LogicType on a device by the index value
+        /// ## IC10
+        /// `ss d0 0 "Open" 1`
+        /// ## Slang
+        /// `setSlot(deviceHash, 0, "Open", true);`
+        /// `ss(deviceHash, 0, "Open", true);`
+        SetSlot(
+            Spanned<LiteralOrVariable<'a>>,
+            Spanned<Literal<'a>>,
+            Spanned<Literal<'a>>,
+            Box<Spanned<Expression<'a>>>
+        )
     }
 }
 
@@ -235,6 +259,8 @@ impl<'a> std::fmt::Display for System<'a> {
             System::SetOnDeviceBatchedNamed(a, b, c, d) => {
                 write!(f, "setOnDeviceBatchedNamed({}, {}, {}, {})", a, b, c, d)
             }
+            System::LoadSlot(a, b, c) => write!(f, "loadSlot({}, {}, {})", a, b, c),
+            System::SetSlot(a, b, c, d) => write!(f, "setSlot({}, {}, {}, {})", a, b, c, d),
         }
     }
 }
diff --git a/rust_compiler/libs/tokenizer/src/token.rs b/rust_compiler/libs/tokenizer/src/token.rs
index bfda737..7127d95 100644
--- a/rust_compiler/libs/tokenizer/src/token.rs
+++ b/rust_compiler/libs/tokenizer/src/token.rs
@@ -39,7 +39,7 @@ impl From<LexError> for Diagnostic {
                     ..Default::default()
                 }
             }
-            _ => todo!(),
+            _ => Diagnostic::default(),
         }
     }
 }