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Rev | Author | Line No. | Line |
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1 | ha | 1 | ; READ RAMDISK IMAGE FROM HD |
2 | |||
3 | cmp [boot_dev],1 |
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4 | jne no_sys_on_hd |
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5 | |||
412 | serge | 6 | test [DRIVE_DATA+1],byte 0x40 |
1 | ha | 7 | jz position_2 |
8 | mov [hdbase],0x1f0 |
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9 | mov [hdid],0x0 |
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10 | mov [hdpos],1 |
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11 | mov [fat32part],0 |
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12 | position_1_1: |
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13 | inc [fat32part] |
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14 | call search_and_read_image |
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15 | cmp [image_retrieved],1 |
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16 | je yes_sys_on_hd |
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412 | serge | 17 | movzx eax,byte [DRIVE_DATA+2] |
1 | ha | 18 | cmp [fat32part],eax |
19 | jle position_1_1 |
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20 | position_2: |
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412 | serge | 21 | test [DRIVE_DATA+1],byte 0x10 |
1 | ha | 22 | jz position_3 |
23 | mov [hdbase],0x1f0 |
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24 | mov [hdid],0x10 |
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25 | mov [hdpos],2 |
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26 | mov [fat32part],0 |
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27 | position_2_1: |
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28 | inc [fat32part] |
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29 | call search_and_read_image |
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30 | cmp [image_retrieved],1 |
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31 | je yes_sys_on_hd |
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412 | serge | 32 | movzx eax,byte [DRIVE_DATA+3] |
1 | ha | 33 | cmp eax,[fat32part] |
34 | jle position_2_1 |
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35 | position_3: |
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412 | serge | 36 | test [DRIVE_DATA+1],byte 0x4 |
1 | ha | 37 | jz position_4 |
38 | mov [hdbase],0x170 |
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39 | mov [hdid],0x0 |
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40 | mov [hdpos],3 |
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41 | mov [fat32part],0 |
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42 | position_3_1: |
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43 | inc [fat32part] |
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44 | call search_and_read_image |
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45 | cmp [image_retrieved],1 |
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46 | je yes_sys_on_hd |
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412 | serge | 47 | movzx eax,byte [DRIVE_DATA+4] |
1 | ha | 48 | cmp eax,[fat32part] |
49 | jle position_3_1 |
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50 | position_4: |
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412 | serge | 51 | test [DRIVE_DATA+1],byte 0x1 |
1 | ha | 52 | jz no_sys_on_hd |
53 | mov [hdbase],0x170 |
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54 | mov [hdid],0x10 |
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55 | mov [hdpos],4 |
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56 | mov [fat32part],0 |
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57 | position_4_1: |
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58 | inc [fat32part] |
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59 | call search_and_read_image |
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60 | cmp [image_retrieved],1 |
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61 | je yes_sys_on_hd |
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412 | serge | 62 | movzx eax,byte [DRIVE_DATA+5] |
1 | ha | 63 | cmp eax,[fat32part] |
64 | jle position_4_1 |
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65 | jmp yes_sys_on_hd |
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66 | |||
67 | search_and_read_image: |
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68 | call set_FAT32_variables |
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69 | mov edx, bootpath |
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70 | call read_image |
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71 | test eax, eax |
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72 | jz image_present |
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73 | mov edx, bootpath2 |
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74 | call read_image |
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75 | test eax, eax |
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76 | jz image_present |
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77 | ret |
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78 | image_present: |
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79 | mov [image_retrieved],1 |
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80 | ret |
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81 | |||
82 | read_image: |
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83 | mov eax, hdsysimage |
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84 | mov ebx, 1474560/512 |
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381 | serge | 85 | mov ecx, RAMDISK |
1 | ha | 86 | mov esi, 0 |
87 | mov edi, 12 |
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88 | call file_read |
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381 | serge | 89 | ret |
1 | ha | 90 | |
381 | serge | 91 | image_retrieved db 0 |
1 | ha | 92 | counter_of_partitions db 0 |
93 | no_sys_on_hd: |
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94 | yes_sys_on_hd: |