Subversion Repositories Kolibri OS

Rev

Rev 1065 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2288 clevermous 1 
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
2 
;;                                                              ;;
3 
;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
4 
;; Distributed under terms of the GNU General Public License    ;;
5 
;;                                                              ;;
6 
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
7 
 
8 
 
9 
; READ RAMDISK IMAGE FROM HD
10 
 
11 
        cmp     [boot_dev+OS_BASE+0x10000], 1
12 
        jne     no_sys_on_hd
13 
 
14 
        test    [DRIVE_DATA+1], byte 0x40
15 
        jz      position_2
16 
        mov     [hdbase], 0x1f0
17 
        mov     [hdid], 0x0
18 
        mov     [hdpos], 1
19 
        mov     [fat32part], 0
20 
  position_1_1:
21 
        inc     [fat32part]
22 
        call    search_and_read_image
23 
        cmp     [image_retrieved], 1
24 
        je      yes_sys_on_hd
25 
        movzx   eax, byte [DRIVE_DATA+2]
26 
        cmp     [fat32part], eax
27 
        jle     position_1_1
28 
  position_2:
29 
        test    [DRIVE_DATA+1], byte 0x10
30 
        jz      position_3
31 
        mov     [hdbase], 0x1f0
32 
        mov     [hdid], 0x10
33 
        mov     [hdpos], 2
34 
        mov     [fat32part], 0
35 
  position_2_1:
36 
        inc     [fat32part]
37 
        call    search_and_read_image
38 
        cmp     [image_retrieved], 1
39 
        je      yes_sys_on_hd
40 
        movzx   eax, byte [DRIVE_DATA+3]
41 
        cmp     eax, [fat32part]
42 
        jle     position_2_1
43 
  position_3:
44 
        test    [DRIVE_DATA+1], byte 0x4
45 
        jz      position_4
46 
        mov     [hdbase], 0x170
47 
        mov     [hdid], 0x0
48 
        mov     [hdpos], 3
49 
        mov     [fat32part], 0
50 
  position_3_1:
51 
        inc     [fat32part]
52 
        call    search_and_read_image
53 
        cmp     [image_retrieved], 1
54 
        je      yes_sys_on_hd
55 
        movzx   eax, byte [DRIVE_DATA+4]
56 
        cmp     eax, [fat32part]
57 
        jle     position_3_1
58 
  position_4:
59 
        test    [DRIVE_DATA+1], byte 0x1
60 
        jz      no_sys_on_hd
61 
        mov     [hdbase], 0x170
62 
        mov     [hdid], 0x10
63 
        mov     [hdpos], 4
64 
        mov     [fat32part], 0
65 
  position_4_1:
66 
        inc     [fat32part]
67 
        call    search_and_read_image
68 
        cmp     [image_retrieved], 1
69 
        je      yes_sys_on_hd
70 
        movzx   eax, byte [DRIVE_DATA+5]
71 
        cmp     eax, [fat32part]
72 
        jle     position_4_1
73 
        jmp     yes_sys_on_hd
74 
 
75 
  search_and_read_image:
76 
        call    set_FAT32_variables
77 
        mov     edx, bootpath
78 
        call    read_image
79 
        test    eax, eax
80 
        jz      image_present
81 
        mov     edx, bootpath2
82 
        call    read_image
83 
        test    eax, eax
84 
        jz      image_present
85 
        ret
86 
    image_present:
87 
        mov     [image_retrieved], 1
88 
        ret
89 
 
90 
read_image:
91 
        mov     eax, hdsysimage+OS_BASE+0x10000
92 
        mov     ebx, 1474560/512
93 
        mov     ecx, RAMDISK
94 
        mov     esi, 0
95 
        mov     edi, 12
96 
        call    file_read
97 
        ret
98 
 
99 
image_retrieved  db 0
100 
counter_of_partitions db 0
101 
no_sys_on_hd:
102 
        ; test_to_format_ram_disk (need if not using ram disk)
103 
        cmp     [boot_dev+OS_BASE+0x10000], 3
104 
        jne     not_format_ram_disk
105 
        ; format_ram_disk
106 
        mov     edi, RAMDISK
107 
        mov     ecx, 0x1080
108 
        xor     eax, eax
109 
@@:
110 
        stosd
111 
        loop    @b
112 
 
113 
        mov     ecx, 0x58F7F
114 
        mov     eax, 0xF6F6F6F6
115 
@@:
116 
        stosd
117 
        loop    @b
118 
 
119 
        mov     [RAMDISK+0x200], dword 0xFFFFF0         ; fat table
120 
        mov     [RAMDISK+0x4200], dword 0xFFFFF0
121 
 
122 
not_format_ram_disk:
123 
yes_sys_on_hd: