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431 | serge | 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 | |||
593 | mikedld | 8 | $Revision: 1952 $ |
9 | |||
10 | |||
1 | ha | 11 | ; READ RAMDISK IMAGE FROM HD |
12 | |||
1952 | art_zh | 13 | cmp [boot_dev+OS_BASE+0x10000],1 |
14 | ; jne no_sys_on_hd |
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1 | ha | 15 | |
1952 | art_zh | 16 | test [DRIVE_DATA+1],byte 0x40 |
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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1 | ha | 22 | position_1_1: |
1952 | art_zh | 23 | inc [fat32part] |
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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1 | ha | 30 | position_2: |
1952 | art_zh | 31 | test [DRIVE_DATA+1],byte 0x10 |
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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1 | ha | 37 | position_2_1: |
1952 | art_zh | 38 | inc [fat32part] |
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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1 | ha | 45 | position_3: |
1952 | art_zh | 46 | test [DRIVE_DATA+1],byte 0x4 |
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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1 | ha | 52 | position_3_1: |
1952 | art_zh | 53 | inc [fat32part] |
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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1 | ha | 60 | position_4: |
1952 | art_zh | 61 | test [DRIVE_DATA+1],byte 0x1 |
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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1 | ha | 67 | position_4_1: |
1952 | art_zh | 68 | inc [fat32part] |
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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1 | ha | 76 | |
77 | search_and_read_image: |
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1952 | art_zh | 78 | call set_FAT32_variables |
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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1 | ha | 88 | image_present: |
1952 | art_zh | 89 | mov [image_retrieved],1 |
90 | ret |
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1 | ha | 91 | |
92 | read_image: |
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1952 | art_zh | 93 | mov eax, hdsysimage+OS_BASE+0x10000 |
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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1 | ha | 100 | |
381 | serge | 101 | image_retrieved db 0 |
1 | ha | 102 | counter_of_partitions db 0 |
103 | no_sys_on_hd: |
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1952 | art_zh | 104 | ; test_to_format_ram_disk (need if not using ram disk) |
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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545 | spraid | 112 | stosd |
1952 | art_zh | 113 | loop @b |
545 | spraid | 114 | |
1952 | art_zh | 115 | mov ecx, 0x58F7F |
116 | mov eax,0xF6F6F6F6 |
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117 | @@: |
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545 | spraid | 118 | stosd |
1952 | art_zh | 119 | loop @b |
120 | |||
121 | mov [RAMDISK+0x200],dword 0xFFFFF0 ; fat table |
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122 | mov [RAMDISK+0x4200],dword 0xFFFFF0 |
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123 | |||
545 | spraid | 124 | not_format_ram_disk: |
1 | ha | 125 | yes_sys_on_hd: |