;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; Copyright (C) KolibriOS team 2009-2017. All rights reserved. ;; ;; Distributed under terms of the GNU General Public License ;; ;; ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; $Revision: 7122 $ ; 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, BOOT_MEMMAP_BLOCKS mov [BOOT_MEMMAP_BLOCK_CNT], ebx ; no blocks yet mov ecx, 20 mov edx, 'PAMS' ; 'SMAP' int 15h jc no_E820 cmp eax, 'PAMS' jnz no_E820 e820_mem_loop: ; cmp byte [di+16], 1 ; ignore non-free areas ; jnz e820_mem_next inc byte [BOOT_MEMMAP_BLOCK_CNT] add di, sizeof.e820entry e820_mem_next: ; consequent calls to fn E820 test ebx, ebx jz e820_test_done cmp byte [BOOT_MEMMAP_BLOCK_CNT], MAX_MEMMAP_BLOCKS jz 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