diff --git a/kernel/trunk/detect/biosmem.inc b/kernel/trunk/detect/biosmem.inc
new file mode 100644
index 0000000000..7b66cd4b66
--- /dev/null
+++ b/kernel/trunk/detect/biosmem.inc
@@ -0,0 +1,43 @@
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;                                                              ;;
+;; Copyright (C) KolibriOS team 2009. All rights reserved.      ;;
+;; Distributed under terms of the GNU General Public License    ;;
+;;                                                              ;;
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+; Query physical memory map from BIOS.
+; diamond, 2009
+
+        push    ds
+; first call to fn E820
+        mov     eax, 0xE820
+        xor     ebx, ebx
+        mov     es, bx
+        mov     ds, bx
+        mov     di, 0x9104
+        mov     [di-4], ebx ; no blocks yet
+        mov     ecx, 20
+        mov     edx, 0x534D4150
+        int     15h
+        jc      no_E820
+        cmp     eax, 0x534D4150
+        jnz     no_E820
+e820_mem_loop:
+        cmp     byte [di+16], 1 ; ignore non-free areas
+        jnz     e820_mem_next
+        inc     byte [0x9100]
+        add     di, 20
+e820_mem_next:
+; consequent calls to fn E820
+        test    ebx, ebx
+        jz      e820_test_done
+        cmp     byte [0x9100], 32
+        jae     e820_test_done
+        mov     eax, 0xE820
+        int     15h
+        jc      e820_test_done
+        jmp     e820_mem_loop
+no_E820:
+; let's hope for mem_test from init.inc
+e820_test_done:
+        pop     ds