diff --git a/neorv32 b/neorv32
index 01e88db..87a78de 160000
--- a/neorv32
+++ b/neorv32
@@ -1 +1 @@
-Subproject commit 01e88db0fd6f3ceaf6072eaf269c93dec619b152
+Subproject commit 87a78de173ad780411699b0ffc981fa7c6390d4d
diff --git a/sim/neorv32_vuinit_tb.vhd b/sim/neorv32_vuinit_tb.vhd
index f07c62f..874d7eb 100644
--- a/sim/neorv32_vuinit_tb.vhd
+++ b/sim/neorv32_vuinit_tb.vhd
@@ -75,7 +75,7 @@ architecture neorv32_vunit_tb_rtl of neorv32_vunit_tb is
   signal uart0_cts, uart1_cts : std_ulogic;
 
   -- gpio --
-  signal gpio : std_ulogic_vector(63 downto 0);
+  signal gpio : std_ulogic_vector(31 downto 0);
 
   -- twi --
   signal i2c_scl, i2c_sda : std_logic;
@@ -256,10 +256,8 @@ begin
     XIP_CACHE_EN          => true,
     XIP_CACHE_NUM_BLOCKS  => 4,
     XIP_CACHE_BLOCK_SIZE  => 256,
-    -- External Interrupts Controller (XIRQ) --
-    XIRQ_NUM_CH           => 32,
     -- Processor peripherals --
-    IO_GPIO_NUM           => 64,
+    IO_GPIO_NUM           => 32,
     IO_CLINT_EN           => true,
     IO_UART0_EN           => true,
     IO_UART0_RX_FIFO      => 32,
@@ -375,8 +373,6 @@ begin
     neoled_o       => open,
     -- Machine timer system time (available if IO_MTIME_EN = true) --
     mtime_time_o   => open,
-    -- External platform interrupts (available if XIRQ_NUM_CH > 0) --
-    xirq_i         => gpio(31 downto 0),
     -- CPU Interrupts --
     mtime_irq_i    => '0',
     msw_irq_i      => msi_ring,