--- a/xenia-rs/crates/xenia-kernel/src/exports.rs
+++ b/xenia-rs/crates/xenia-kernel/src/exports.rs
@@ stub_return_zero …
 fn stub_return_zero(ctx: &mut PpcContext, _mem: &GuestMemory, _state: &mut KernelState) {
     ctx.gpr[3] = 0;
 }

+/// Phase W: a literal `return 1`. Matches canary's
+/// `VdInitializeEngines_entry` in `xboxkrnl_video.cc:271-279` which
+/// returns `1` (truthy success token) rather than STATUS_SUCCESS=0.
+/// Sylpheed-side guest code branches on this non-zero, so returning
+/// 0 made the game skip the VdInitializeRingBuffer-and-after init
+/// sequence and never set up the post-init render-target state.
+fn stub_return_one(ctx: &mut PpcContext, _mem: &GuestMemory, _state: &mut KernelState) {
+    ctx.gpr[3] = 1;
+}
+
@@ exports table …
-    state.register_export(Xboxkrnl, 0x01C2, "VdInitializeEngines", stub_success);
+    state.register_export(Xboxkrnl, 0x01C2, "VdInitializeEngines", stub_return_one);

@@ tests mod …
+    /// Phase W: ensure `VdInitializeEngines` writes `r3=1` …
+    #[test]
+    fn vd_initialize_engines_returns_one() {
+        let (mut ctx, mem, mut state) = fresh();
+        ctx.gpr[3] = 0xDEAD_BEEF; // sentinel — must be overwritten
+        stub_return_one(&mut ctx, &mem, &mut state);
+        assert_eq!(ctx.gpr[3], 1, "stub_return_one must put 1 in r3");
+    }