diff --git a/crates/console/prometeu-drivers/src/audio.rs b/crates/console/prometeu-drivers/src/audio.rs
index e6c490f9..cdace8e6 100644
--- a/crates/console/prometeu-drivers/src/audio.rs
+++ b/crates/console/prometeu-drivers/src/audio.rs
@@ -183,10 +183,12 @@ impl Audio {
         }
 
         // Resolve the sample from the hardware pools
-        let sample = self
-            .sound_banks
-            .sound_bank_slot(bank_id as usize)
-            .and_then(|bank| bank.samples.get(sample_id as usize).map(Arc::clone));
+        let bank_slot = self.sound_banks.sound_bank_slot(bank_id as usize);
+        if bank_slot.is_none() {
+            return AudioOpStatus::BankInvalid;
+        }
+
+        let sample = bank_slot.and_then(|bank| bank.samples.get(sample_id as usize).map(Arc::clone));
 
         if let Some(s) = sample {
             // println!(
diff --git a/crates/console/prometeu-hal/src/audio_bridge.rs b/crates/console/prometeu-hal/src/audio_bridge.rs
index f09febb3..9503ba18 100644
--- a/crates/console/prometeu-hal/src/audio_bridge.rs
+++ b/crates/console/prometeu-hal/src/audio_bridge.rs
@@ -16,6 +16,7 @@ pub enum AudioOpStatus {
     ArgRangeInvalid = 3,
     AssetNotFound = 4,
     NoEffect = 5,
+    BankInvalid = 6,
 }
 
 pub trait AudioBridge {
diff --git a/crates/console/prometeu-hal/src/gfx_bridge.rs b/crates/console/prometeu-hal/src/gfx_bridge.rs
index b1fc5ca8..528081b6 100644
--- a/crates/console/prometeu-hal/src/gfx_bridge.rs
+++ b/crates/console/prometeu-hal/src/gfx_bridge.rs
@@ -18,6 +18,7 @@ pub enum GfxOpStatus {
     AssetNotFound = 1,
     InvalidSpriteIndex = 2,
     ArgRangeInvalid = 3,
+    BankInvalid = 4,
 }
 
 pub trait GfxBridge {
diff --git a/crates/console/prometeu-system/src/virtual_machine_runtime/dispatch.rs b/crates/console/prometeu-system/src/virtual_machine_runtime/dispatch.rs
index 21d3203e..06546bad 100644
--- a/crates/console/prometeu-system/src/virtual_machine_runtime/dispatch.rs
+++ b/crates/console/prometeu-system/src/virtual_machine_runtime/dispatch.rs
@@ -150,6 +150,12 @@ impl NativeInterface for VirtualMachineRuntime {
                     ret.push_int(GfxOpStatus::InvalidSpriteIndex as i64);
                     return Ok(());
                 }
+
+                if hw.assets().slot_info(SlotRef::gfx(bank_id as usize)).asset_id.is_none() {
+                    ret.push_int(GfxOpStatus::BankInvalid as i64);
+                    return Ok(());
+                }
+
                 if palette_id >= 64 || priority >= 5 {
                     ret.push_int(GfxOpStatus::ArgRangeInvalid as i64);
                     return Ok(());
@@ -237,6 +243,11 @@ impl NativeInterface for VirtualMachineRuntime {
                     return Ok(());
                 }
 
+                if hw.assets().slot_info(SlotRef::audio(bank_id as usize)).asset_id.is_none() {
+                    ret.push_int(AudioOpStatus::BankInvalid as i64);
+                    return Ok(());
+                }
+
                 if sample_id_raw < 0
                     || sample_id_raw > u16::MAX as i64
                     || !(0..=255).contains(&volume_raw)
diff --git a/crates/console/prometeu-system/src/virtual_machine_runtime/tests.rs b/crates/console/prometeu-system/src/virtual_machine_runtime/tests.rs
index d140e4c1..298018b9 100644
--- a/crates/console/prometeu-system/src/virtual_machine_runtime/tests.rs
+++ b/crates/console/prometeu-system/src/virtual_machine_runtime/tests.rs
@@ -376,7 +376,7 @@ fn tick_gfx_set_sprite_operational_error_returns_status_not_crash() {
     let report = runtime.tick(&mut vm, &signals, &mut hardware);
     assert!(report.is_none(), "operational error must not crash");
     assert!(vm.is_halted());
-    assert_eq!(vm.operand_stack_top(1), vec![Value::Int64(GfxOpStatus::Ok as i64)]);
+    assert_eq!(vm.operand_stack_top(1), vec![Value::Int64(GfxOpStatus::BankInvalid as i64)]);
 }
 
 #[test]
@@ -437,7 +437,7 @@ fn tick_gfx_set_sprite_invalid_range_returns_status_not_crash() {
     let report = runtime.tick(&mut vm, &signals, &mut hardware);
     assert!(report.is_none(), "invalid gfx parameter range must not crash");
     assert!(vm.is_halted());
-    assert_eq!(vm.operand_stack_top(1), vec![Value::Int64(GfxOpStatus::ArgRangeInvalid as i64)]);
+    assert_eq!(vm.operand_stack_top(1), vec![Value::Int64(GfxOpStatus::BankInvalid as i64)]);
 }
 
 #[test]
@@ -522,7 +522,7 @@ fn tick_audio_play_missing_asset_returns_status_not_crash() {
     let report = runtime.tick(&mut vm, &signals, &mut hardware);
     assert!(report.is_none(), "missing audio asset must not crash");
     assert!(vm.is_halted());
-    assert_eq!(vm.operand_stack_top(1), vec![Value::Int64(AudioOpStatus::SampleNotFound as i64)]);
+    assert_eq!(vm.operand_stack_top(1), vec![Value::Int64(AudioOpStatus::BankInvalid as i64)]);
 }
 
 #[test]
@@ -930,8 +930,8 @@ fn tick_status_first_surface_smoke_across_gfx_audio_and_asset() {
         vec![
             Value::Int64(0),
             Value::Int64(AssetLoadError::AssetNotFound as i64),
-            Value::Int64(AudioOpStatus::SampleNotFound as i64),
-            Value::Int64(GfxOpStatus::Ok as i64),
+            Value::Int64(AudioOpStatus::BankInvalid as i64),
+            Value::Int64(GfxOpStatus::BankInvalid as i64),
         ]
     );
 }
diff --git a/crates/tools/pbxgen-stress/src/lib.rs b/crates/tools/pbxgen-stress/src/lib.rs
index 031f0e71..948f5146 100644
--- a/crates/tools/pbxgen-stress/src/lib.rs
+++ b/crates/tools/pbxgen-stress/src/lib.rs
@@ -126,7 +126,7 @@ fn heavy_load(rom: &mut Vec<u8>) {
     rom.extend(asm("PUSH_I32 0\nHOSTCALL 0"));
     // --- call status-first syscall path once per frame and drop status ---
     rom.extend(asm(
-        "PUSH_CONST 2\nPUSH_I32 0\nPUSH_I32 0\nPUSH_I32 0\nPUSH_I32 0\nPUSH_I32 0\nPUSH_BOOL 0\nPUSH_BOOL 0\nPUSH_BOOL 0\nPUSH_I32 0\nHOSTCALL 4\nPOP_N 1",
+        "PUSH_I32 0\nPUSH_I32 0\nPUSH_I32 0\nPUSH_I32 0\nPUSH_I32 0\nPUSH_I32 0\nPUSH_BOOL 0\nPUSH_BOOL 0\nPUSH_BOOL 0\nPUSH_I32 0\nHOSTCALL 4\nPOP_N 1",
     ));
 
     // --- draw 500 discs ---
diff --git a/docs/runtime/specs/04-gfx-peripheral.md b/docs/runtime/specs/04-gfx-peripheral.md
index 12e1fd81..c9acb8b6 100644
--- a/docs/runtime/specs/04-gfx-peripheral.md
+++ b/docs/runtime/specs/04-gfx-peripheral.md
@@ -564,6 +564,7 @@ Minimum status table:
 - `0` = `OK`
 - `2` = `INVALID_SPRITE_INDEX`
 - `3` = `INVALID_ARG_RANGE`
+- `4` = `BANK_INVALID`
 
 Operational notes:
 
diff --git a/docs/runtime/specs/05-audio-peripheral.md b/docs/runtime/specs/05-audio-peripheral.md
index cd459fec..1eeb80db 100644
--- a/docs/runtime/specs/05-audio-peripheral.md
+++ b/docs/runtime/specs/05-audio-peripheral.md
@@ -215,6 +215,7 @@ Return-shape matrix in v1 syscall surface:
 - `2` = `SAMPLE_NOT_FOUND`
 - `3` = `ARG_RANGE_INVALID`
 - `5` = `NO_EFFECT`
+- `6` = `BANK_INVALID`
 
 Operational rules:
 
diff --git a/test-cartridges/stress-console/program.pbx b/test-cartridges/stress-console/program.pbx
index 3c7e6c0e..f2013a83 100644
Binary files a/test-cartridges/stress-console/program.pbx and b/test-cartridges/stress-console/program.pbx differ