It's definitely possible, just that the interpreter doesn't run often enough...

src/backend/Scheduler.cpp

@@ -18,15 +18,15 @@ u64 Scheduler::Remove(const EventType eventType) const {
   return 0;
 }
 
-void Scheduler::Tick(const u64 t) {
+void Scheduler::Tick(const u64 t, float volumeL, float volumeR) {
   n64::Mem& mem = n64::Core::GetMem();
   ticks += t;
   n64::MI &mi = mem.mmio.mi;
   n64::SI &si = mem.mmio.si;
   n64::PI &pi = mem.mmio.pi;
 
-  while (ticks >= events.top().time) {
-    switch (const auto type = events.top().type) {
+  for (auto event = events.top(); ticks >= event.time; events.pop()) {
+    switch (event.type) {
     case SI_DMA:
       si.DMA();
       break;
@@ -37,15 +37,17 @@ void Scheduler::Tick(const u64 t) {
     case PI_BUS_WRITE_COMPLETE:
       pi.ioBusy = false;
       break;
+    case VI_HALFLINE:
+      n64::Core::GetInstance().VIHalflineComplete(ticks, volumeL, volumeR);
+      break;
     case NONE:
       break;
     case IMPOSSIBLE:
       Util::Error::GetInstance().Throw({Util::Error::Severity::UNRECOVERABLE}, {Util::Error::Type::ROM_LOAD_ERROR}, {}, {}, "Unrecognized rom endianness");
       return;
     default:
-      Util::Error::GetInstance().Throw({Util::Error::Severity::UNRECOVERABLE}, {Util::Error::Type::ROM_LOAD_ERROR}, {}, {}, "Unknown scheduler event type {}", static_cast<int>(type));
+      Util::Error::GetInstance().Throw({Util::Error::Severity::UNRECOVERABLE}, {Util::Error::Type::ROM_LOAD_ERROR}, {}, {}, "Unknown scheduler event type {}", static_cast<int>(event.type));
       return;
     }
-    events.pop();
   }
 }