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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
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4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | $Revision: 2288 $ |
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9 | |||
10 | |||
11 | ; READ RAMDISK IMAGE FROM HD |
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12 | |||
13 | cmp [boot_dev+OS_BASE+0x10000], 1 |
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14 | jne no_sys_on_hd |
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15 | |||
16 | test [DRIVE_DATA+1], byte 0x40 |
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17 | jz position_2 |
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18 | mov [hdbase], 0x1f0 |
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19 | mov [hdid], 0x0 |
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20 | mov [hdpos], 1 |
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21 | mov [fat32part], 0 |
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22 | position_1_1: |
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23 | inc [fat32part] |
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24 | call search_and_read_image |
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25 | cmp [image_retrieved], 1 |
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26 | je yes_sys_on_hd |
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27 | movzx eax, byte [DRIVE_DATA+2] |
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28 | cmp [fat32part], eax |
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29 | jle position_1_1 |
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30 | position_2: |
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31 | test [DRIVE_DATA+1], byte 0x10 |
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32 | jz position_3 |
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33 | mov [hdbase], 0x1f0 |
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34 | mov [hdid], 0x10 |
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35 | mov [hdpos], 2 |
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36 | mov [fat32part], 0 |
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37 | position_2_1: |
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38 | inc [fat32part] |
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39 | call search_and_read_image |
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40 | cmp [image_retrieved], 1 |
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41 | je yes_sys_on_hd |
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42 | movzx eax, byte [DRIVE_DATA+3] |
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43 | cmp eax, [fat32part] |
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44 | jle position_2_1 |
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45 | position_3: |
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46 | test [DRIVE_DATA+1], byte 0x4 |
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47 | jz position_4 |
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48 | mov [hdbase], 0x170 |
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49 | mov [hdid], 0x0 |
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50 | mov [hdpos], 3 |
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51 | mov [fat32part], 0 |
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52 | position_3_1: |
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53 | inc [fat32part] |
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54 | call search_and_read_image |
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55 | cmp [image_retrieved], 1 |
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56 | je yes_sys_on_hd |
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57 | movzx eax, byte [DRIVE_DATA+4] |
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58 | cmp eax, [fat32part] |
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59 | jle position_3_1 |
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60 | position_4: |
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61 | test [DRIVE_DATA+1], byte 0x1 |
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62 | jz no_sys_on_hd |
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63 | mov [hdbase], 0x170 |
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64 | mov [hdid], 0x10 |
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65 | mov [hdpos], 4 |
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66 | mov [fat32part], 0 |
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67 | position_4_1: |
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68 | inc [fat32part] |
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69 | call search_and_read_image |
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70 | cmp [image_retrieved], 1 |
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71 | je yes_sys_on_hd |
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72 | movzx eax, byte [DRIVE_DATA+5] |
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73 | cmp eax, [fat32part] |
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74 | jle position_4_1 |
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75 | jmp yes_sys_on_hd |
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76 | |||
77 | search_and_read_image: |
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78 | call set_FAT32_variables |
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79 | mov edx, bootpath |
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80 | call read_image |
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81 | test eax, eax |
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82 | jz image_present |
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83 | mov edx, bootpath2 |
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84 | call read_image |
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85 | test eax, eax |
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86 | jz image_present |
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87 | ret |
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88 | image_present: |
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89 | mov [image_retrieved], 1 |
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90 | ret |
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91 | |||
92 | read_image: |
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93 | mov eax, hdsysimage+OS_BASE+0x10000 |
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94 | mov ebx, 1474560/512 |
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95 | mov ecx, RAMDISK |
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96 | mov esi, 0 |
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97 | mov edi, 12 |
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98 | call file_read |
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99 | ret |
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100 | |||
101 | image_retrieved db 0 |
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102 | counter_of_partitions db 0 |
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103 | no_sys_on_hd: |
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104 | ; test_to_format_ram_disk (need if not using ram disk) |
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105 | cmp [boot_dev+OS_BASE+0x10000], 3 |
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106 | jne not_format_ram_disk |
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107 | ; format_ram_disk |
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108 | mov edi, RAMDISK |
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109 | mov ecx, 0x1080 |
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110 | xor eax, eax |
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111 | @@: |
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112 | stosd |
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113 | loop @b |
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114 | |||
115 | mov ecx, 0x58F7F |
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116 | mov eax, 0xF6F6F6F6 |
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117 | @@: |
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118 | stosd |
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119 | loop @b |
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120 | |||
121 | mov [RAMDISK+0x200], dword 0xFFFFF0 ; fat table |
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122 | mov [RAMDISK+0x4200], dword 0xFFFFF0 |
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123 | |||
124 | not_format_ram_disk: |
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125 | yes_sys_on_hd: |