diff --git a/VKernel/Kernel/intr/idt.vp b/VKernel/Kernel/intr/idt.vp
index 416bca4..31b4ea2 100644
--- a/VKernel/Kernel/intr/idt.vp
+++ b/VKernel/Kernel/intr/idt.vp
@@ -17,7 +17,7 @@ class idt_entry:
     base_middle: t.CUInt16T
     base_high:   t.CUInt32T
     reserved1:   t.CUInt32T
-idt: t.CArray[idt_entry, 256] = []
+idt: t.CArray[idt_entry, 256] | t.CExport = []
 
 irq_handler_t: t.CTypedef = t.Callable[[], t.CInt]
 
@@ -201,6 +201,8 @@ def isr29_handler() -> t.CExport | t.CVoid: isrCommonhandler(29)
 def isr30_handler() -> t.CExport | t.CVoid: isrCommonhandler(30)
 def isr31_handler() -> t.CExport | t.CVoid: isrCommonhandler(31)
 def isr32_handler() -> t.CExport | t.CVoid:
+    # [DBG] 中断入口诊断：若打印 'T' 说明 IRQ0 到达 isr32（用后移除）
+    serial.puts("T")
     timer.timer_handler()
 
 def isr33_handler() -> t.CExport | t.CVoid:
diff --git a/VKernel/Kernel/intr/isr.s b/VKernel/Kernel/intr/isr.s
index c03757f..152a9f5 100644
--- a/VKernel/Kernel/intr/isr.s
+++ b/VKernel/Kernel/intr/isr.s
@@ -16,6 +16,9 @@
 isr_default:
     push rax
     push rdx
+    mov dx, 0x3F8
+    mov al, 0x44          # [DBG] 'D' = 中断向量到默认处理（用后移除）
+    out dx, al
     mov al, 0x20
     out 0xA0, al
     out 0x20, al