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diff --git a/misc/test_vm/include/geekos/defs.h b/misc/test_vm/include/geekos/defs.h
new file mode 100644
index 0000000..07981f7
--- /dev/null
+++ b/misc/test_vm/include/geekos/defs.h
@@ -0,0 +1,113 @@
+/*
+ * Misc. kernel definitions
+ * Copyright (c) 2001,2004 David H. Hovemeyer <daveho@cs.umd.edu>
+ * $Revision: 1.1 $
+ * 
+ * This is free software.  You are permitted to use,
+ * redistribute, and modify it as specified in the file "COPYING".
+ */
+
+#ifndef GEEKOS_DEFS_H
+#define GEEKOS_DEFS_H
+
+
+
+
+/*
+ * Kernel code and data segment selectors.
+ * Keep these up to date with defs.asm.
+ */
+#define KERNEL_CS  (1<<3)
+#define KERNEL_DS  (2<<3)
+
+
+/*
+ * Address where kernel is loaded INITIALLY
+ * we move it up in memory soon
+ */
+#define KERNEL_START_ADDR 0x100000
+
+/*
+ * Kernel and user privilege levels
+ */
+#define KERNEL_PRIVILEGE 0
+#define USER_PRIVILEGE 3
+
+
+/*
+ * Software interrupt for syscalls
+ */
+#define SYSCALL_INT 0x90
+
+/*
+ * The windows versions of gcc use slightly different
+ * names for the bss begin and end symbols than the Linux version.
+ */
+#if defined(GNU_WIN32)
+#  define BSS_START _bss_start__
+#  define BSS_END _bss_end__
+#else
+#  define BSS_START __bss_start
+#  define BSS_END end
+#endif
+
+/*
+ * x86 has 4096 byte pages
+ */
+#define PAGE_POWER 12
+#define PAGE_SIZE (1<<PAGE_POWER)
+#define PAGE_MASK (~(0xffffffff << PAGE_POWER))
+
+
+
+/* Ultimate Memory Layout
+
+0:
+4096: KernelThreadObject (one page)
+      KernelStack (one page)
+      GDT (one page)
+      TSS (one page)
+      IDT (one page)
+0x100000: KernelImage
+          Page List          (varies - must be an integral number of pages)
+	  KernelHeap         (varies - KERNEL_HEAP_SIZE; must be integral number of pages)
+*/
+
+
+
+
+#define GDT_SIZE PAGE_SIZE
+#define TSS_SIZE PAGE_SIZE
+#define IDT_SIZE PAGE_SIZE
+//#define KERNEL_HEAP_SIZE (256*PAGE_SIZE)
+#define KERNEL_STACK_SIZE PAGE_SIZE
+#define KERNEL_THREAD_OBJECT_SIZE PAGE_SIZE
+
+
+
+
+/*
+ *  * Keep these up to date with defs.asm.
+ */
+#define GDT_LOCATION          (PAGE_SIZE * 3)
+#define TSS_LOCATION          (GDT_LOCATION + TSS_SIZE)
+#define IDT_LOCATION          (TSS_LOCATION + IDT_SIZE)
+
+
+
+
+  #define KERNEL_THREAD_OBJECT  (PAGE_SIZE)
+  #define KERNEL_STACK          (KERNEL_THREAD_OBJECT + KERNEL_THREAD_OBJECT_SIZE)
+/*
+  #define KERNEL_HEAP           (KERNEL_STACK + KERNEL_STACK_SIZE)
+  #define KERNEL_PAGELIST       (KERNEL_HEAP + KERNEL_HEAP_SIZE)
+*/
+
+/*
+ * PC memory map
+ */
+#define ISA_HOLE_START 0x0A0000
+#define ISA_HOLE_END   0x100000
+
+
+#endif  /* GEEKOS_DEFS_H */