diff --git a/VKernel/Kernel/main.vp b/VKernel/Kernel/main.vp
index 7d17b4e..42681d7 100644
--- a/VKernel/Kernel/main.vp
+++ b/VKernel/Kernel/main.vp
@@ -78,6 +78,14 @@ class ViperKernel:
         apic.early_init()
         serial.puts("[main] apic init done\n")
 
+        # [DBG] 读回 LAPIC LINT0 与 APIC BASE MSR，验证 EXTINT 配置（用后移除）
+        _lint0: t.CUInt32T = apic.read(0x350)
+        _apic_msr: t.CUInt64T = cpu.msr_read(apic.IA32_APIC_BASE)
+        _abuf: t.CArray[t.CChar, 96]
+        viperlib.snprintf(c.Addr(_abuf), 96, "[APIC] lint0=0x%x apic_base_msr=0x%lx\n",
+                          _lint0, _apic_msr)
+        serial.puts(c.Addr(_abuf))
+
         asm.sti()
         serial.puts("[main] sti done\n")