diff --git a/platform/x86real/pc98/vsync.cpp b/platform/x86real/pc98/vsync.cpp
new file mode 100644
index 00000000..b8fded2c
--- /dev/null
+++ b/platform/x86real/pc98/vsync.cpp
@@ -0,0 +1,55 @@
+#include <stdlib.h>
+#include "platform.h"
+#include "x86real.h"
+#include "platform/x86real/pc98/vsync.hpp"
+
+volatile uint16_t vsync_count_16;
+volatile uint32_t vsync_count_32;
+static void interrupt (*vsync_callback_old)(...);
+bool vsync_active;
+
+static void interrupt vsync_intfunc(...)
+{
+	vsync_count_16++;
+	vsync_count_32++;
+	_outportb_(0x00, 0x20); // End of Interrupt
+	_outportb_(0x64, _AL); // VSync interrupt trigger
+}
+
+void __cdecl vsync_init(void)
+{
+	if(vsync_active) {
+		return;
+	}
+	disable();
+	vsync_callback_old = getvect(0x0A);
+	setvect(0x0A, vsync_intfunc);
+
+	// Disable all interrupts from 0x08 to 0x0F except for 0x0A
+	_outportb_(0x02, (_inportb_(0x02) & 0xFB));
+
+	_outportb_(0x64, _AL); // VSync interrupt trigger
+	enable();
+	vsync_active = true;
+	atexit(vsync_exit);
+}
+
+void __cdecl vsync_exit(void)
+{
+	if(!vsync_active) {
+		return;
+	}
+	disable();
+
+	// Reenable all interrupts from 0x08 to 0x0F except for 0x0A
+	_outportb_(0x02, (_inportb_(0x02) | 0x04));
+
+	setvect(0x0A, vsync_callback_old);
+	enable();
+	vsync_active = false;
+}
+
+bool vsync_is_active(void)
+{
+	return vsync_active;
+}
diff --git a/platform/x86real/pc98/vsync.hpp b/platform/x86real/pc98/vsync.hpp
new file mode 100644
index 00000000..731e2ab6
--- /dev/null
+++ b/platform/x86real/pc98/vsync.hpp
@@ -0,0 +1,17 @@
+// VSync interrupts
+// ----------------
+
+// Incremented by 1 on every VSync interrupt. Can be manually reset to 0 to
+// simplify frame delay loops.
+extern volatile uint16_t vsync_count_16;
+extern volatile uint32_t vsync_count_32;
+
+// Sets up a VSync interrupt that increments [vsync_count_16] and
+// [vsync_count_32] every time it's called. Also registers vsync_exit() to be
+// called at process termination.
+void __cdecl vsync_init(void);
+
+// Removes the VSync interrupt handler set up by vsync_init().
+void __cdecl vsync_exit(void);
+
+bool vsync_is_active(void);