2011-10-14 23:38:50 +02:00
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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; READ RAMDISK IMAGE FROM HD
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cmp [boot_dev+OS_BASE+0x10000], 1
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jne no_sys_on_hd
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test [DRIVE_DATA+1], byte 0x40
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jz position_2
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mov [hdbase], 0x1f0
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mov [hdid], 0x0
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mov [hdpos], 1
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mov [fat32part], 0
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position_1_1:
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inc [fat32part]
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call search_and_read_image
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cmp [image_retrieved], 1
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je yes_sys_on_hd
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movzx eax, byte [DRIVE_DATA+2]
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cmp [fat32part], eax
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jle position_1_1
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position_2:
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test [DRIVE_DATA+1], byte 0x10
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jz position_3
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mov [hdbase], 0x1f0
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mov [hdid], 0x10
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mov [hdpos], 2
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mov [fat32part], 0
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position_2_1:
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inc [fat32part]
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call search_and_read_image
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cmp [image_retrieved], 1
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je yes_sys_on_hd
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movzx eax, byte [DRIVE_DATA+3]
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cmp eax, [fat32part]
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jle position_2_1
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position_3:
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test [DRIVE_DATA+1], byte 0x4
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jz position_4
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mov [hdbase], 0x170
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mov [hdid], 0x0
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mov [hdpos], 3
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mov [fat32part], 0
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position_3_1:
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inc [fat32part]
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call search_and_read_image
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cmp [image_retrieved], 1
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je yes_sys_on_hd
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movzx eax, byte [DRIVE_DATA+4]
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cmp eax, [fat32part]
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jle position_3_1
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position_4:
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test [DRIVE_DATA+1], byte 0x1
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jz no_sys_on_hd
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mov [hdbase], 0x170
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mov [hdid], 0x10
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mov [hdpos], 4
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mov [fat32part], 0
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position_4_1:
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inc [fat32part]
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call search_and_read_image
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cmp [image_retrieved], 1
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je yes_sys_on_hd
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movzx eax, byte [DRIVE_DATA+5]
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cmp eax, [fat32part]
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jle position_4_1
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jmp yes_sys_on_hd
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search_and_read_image:
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call set_FAT32_variables
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mov edx, bootpath
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call read_image
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test eax, eax
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jz image_present
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mov edx, bootpath2
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call read_image
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test eax, eax
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jz image_present
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ret
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image_present:
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mov [image_retrieved], 1
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ret
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read_image:
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mov eax, hdsysimage+OS_BASE+0x10000
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mov ebx, 1474560/512
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mov ecx, RAMDISK
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mov esi, 0
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mov edi, 12
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call file_read
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ret
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image_retrieved db 0
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counter_of_partitions db 0
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no_sys_on_hd:
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; test_to_format_ram_disk (need if not using ram disk)
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cmp [boot_dev+OS_BASE+0x10000], 3
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jne not_format_ram_disk
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; format_ram_disk
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mov edi, RAMDISK
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mov ecx, 0x1080
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xor eax, eax
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@@:
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stosd
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loop @b
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mov ecx, 0x58F7F
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mov eax, 0xF6F6F6F6
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@@:
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stosd
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loop @b
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mov [RAMDISK+0x200], dword 0xFFFFF0 ; fat table
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mov [RAMDISK+0x4200], dword 0xFFFFF0
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not_format_ram_disk:
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yes_sys_on_hd:
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