diff --git a/VKernel/Kernel/main.vp b/VKernel/Kernel/main.vp
index 10971e7..df5894f 100644
--- a/VKernel/Kernel/main.vp
+++ b/VKernel/Kernel/main.vp
@@ -136,6 +136,13 @@ class ViperKernel:
         pitch: t.CUInt64T = BootInfo.framebuffer_pitch
         fb_format: t.CUInt64T = BootInfo.framebuffer_format
         fb_size: t.CUInt64T = BootInfo.framebuffer_size
+        # [DBG] 打印 BootInfo 指针与 memmap 原始字段，定位全 0 根因（用后移除）
+        _dbbuf: t.CArray[t.CChar, 140]
+        viperlib.snprintf(c.Addr(_dbbuf), 140, "[main] BootInfo=0x%lx mmap=0x%lx mmsz=%lu mmd=%lu fb=0x%lx\n",
+                          t.CUInt64T(BootInfo), BootInfo.MemmapAddr, BootInfo.MemmapSize,
+                          BootInfo.MemmapDescSize, BootInfo.framebuffer_addr)
+        serial.puts(c.Addr(_dbbuf))
+
         if BootInfo is not None:
             paging.init(BootInfo.MemmapAddr, BootInfo.MemmapSize)
             fb_pages: t.CUInt64T = (fb_size + t.CUInt64T(0xFFF)) >> t.CUInt64T(12)