diff --git a/src/runtime/src/comms.rs b/src/runtime/src/comms.rs
index 2fa3c8e..e14e7c6 100644
--- a/src/runtime/src/comms.rs
+++ b/src/runtime/src/comms.rs
@@ -32,7 +32,6 @@ use crate::moninj;
 use crate::mgmt;
 use crate::analyzer;
 use crate::rtio_mgt::{self, resolve_channel_name};
-use crate::io_expander;
 #[cfg(has_drtio)]
 use crate::pl;
 
@@ -381,7 +380,7 @@ async fn handle_connection(stream: &mut TcpStream, control: Rc<RefCell<kernel::C
     }
 }
 
-pub fn main(timer: GlobalTimer, cfg: Config, mut io_expander0: io_expander::IoExpander, mut io_expander1: io_expander::IoExpander) {
+pub fn main(timer: GlobalTimer, cfg: Config) {
     let net_addresses = net_settings::get_addresses(&cfg);
     info!("network addresses: {}", net_addresses);
 
@@ -495,11 +494,6 @@ pub fn main(timer: GlobalTimer, cfg: Config, mut io_expander0: io_expander::IoEx
                 let _ = stream.flush().await;
                 let _ = stream.abort().await;
             });
-            #[cfg(feature = "target_kasli_soc")]
-            {
-                io_expander0.service().expect("I2C I/O expander #0 service failed");
-                io_expander1.service().expect("I2C I/O expander #1 service failed");
-            }
         }
     });
 
diff --git a/src/runtime/src/io_expander.rs b/src/runtime/src/io_expander.rs
index 8fcb75c..a199f76 100644
--- a/src/runtime/src/io_expander.rs
+++ b/src/runtime/src/io_expander.rs
@@ -2,7 +2,6 @@ use crate::i2c;
 use log::info;
 
 // Only the bare minimum registers. Bits/IO connections equivalent between IC types.
-#[cfg(feature = "target_kasli_soc")]
 struct Registers {
     // PCA9539 equivalent register names in comments
     iodira: u8, // Configuration Port 0
@@ -11,33 +10,19 @@ struct Registers {
     gpiob: u8,  // Output Port 1
 }
 
-#[cfg(feature = "target_kasli_soc")]
 pub struct IoExpander {
     busno: i32,
     port: u8,
     address: i32,
-    virtual_led_mapping: &'static [(u8, u8, u8)],
     iodir: [u8; 2],
     out_current: [u8; 2],
     out_target: [u8; 2],
     registers: Registers,
 }
 
-#[cfg(not(feature = "target_kasli_soc"))]
-pub struct IoExpander;
 
-#[cfg(not(feature = "target_kasli_soc"))]
 impl IoExpander {
     pub fn new(index: u8) -> Result<Self, &'static str> {
-        Ok(IoExpander {})
-    }
-}
-
-#[cfg(feature = "target_kasli_soc")]
-impl IoExpander {
-    pub fn new(index: u8) -> Result<Self, &'static str> {
-        const VIRTUAL_LED_MAPPING0: [(u8, u8, u8); 2] = [(0, 0, 6), (1, 1, 6)];
-        const VIRTUAL_LED_MAPPING1: [(u8, u8, u8); 2] = [(2, 0, 6), (3, 1, 6)];
 
         // Both expanders on SHARED I2C bus
         let mut io_expander = match index {
@@ -45,7 +30,6 @@ impl IoExpander {
                 busno: 0,
                 port: 11,
                 address: 0x40,
-                virtual_led_mapping: &VIRTUAL_LED_MAPPING0,
                 iodir: [0xff; 2],
                 out_current: [0; 2],
                 out_target: [0; 2],
@@ -60,7 +44,6 @@ impl IoExpander {
                 busno: 0,
                 port: 11,
                 address: 0x42,
-                virtual_led_mapping: &VIRTUAL_LED_MAPPING1,
                 iodir: [0xff; 2],
                 out_current: [0; 2],
                 out_target: [0; 2],
@@ -125,10 +108,6 @@ impl IoExpander {
 
     pub fn init(&mut self) -> Result<(), &'static str> {
         self.select()?;
-
-        for (_led, port, bit) in self.virtual_led_mapping.iter() {
-            self.iodir[*port as usize] &= !(1 << *bit);
-        }
         self.update_iodir()?;
 
         self.out_current[0] = 0x00;
@@ -153,10 +132,6 @@ impl IoExpander {
     }
 
     pub fn service(&mut self) -> Result<(), &'static str> {
-        for (_led, port, bit) in self.virtual_led_mapping.iter() {
-            self.set(*port, *bit, true);
-        }
-
         if self.out_target != self.out_current {
             self.select()?;
             if self.out_target[0] != self.out_current[0] {
diff --git a/src/runtime/src/main.rs b/src/runtime/src/main.rs
index 09e272e..a925be9 100644
--- a/src/runtime/src/main.rs
+++ b/src/runtime/src/main.rs
@@ -46,6 +46,7 @@ mod mgmt;
 mod analyzer;
 mod irq;
 mod i2c;
+#[cfg(feature = "target_kasli_soc")]
 mod io_expander;
 
 static mut SEEN_ASYNC_ERRORS: u8 = 0;
@@ -115,9 +116,9 @@ pub fn main_core0() {
 
     i2c::init();
 
-    let (mut io_expander0, mut io_expander1) = (io_expander::IoExpander::new(0).unwrap(), io_expander::IoExpander::new(1).unwrap());
     #[cfg(feature = "target_kasli_soc")]
     {
+        let (mut io_expander0, mut io_expander1) = (io_expander::IoExpander::new(0).unwrap(), io_expander::IoExpander::new(1).unwrap());
         io_expander0.init().expect("I2C I/O expander #0 initialization failed");
         io_expander1.init().expect("I2C I/O expander #1 initialization failed");
 
@@ -146,5 +147,5 @@ pub fn main_core0() {
 
     task::spawn(report_async_rtio_errors());
 
-    comms::main(timer, cfg, io_expander0, io_expander1);
+    comms::main(timer, cfg);
 }