/kernel/trunk/boot/rdload.inc |
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0,0 → 1,95 |
; READ RAMDISK IMAGE FROM HD |
cmp [boot_dev],1 |
jne no_sys_on_hd |
test [0x40001],byte 0x40 |
jz position_2 |
mov [hdbase],0x1f0 |
mov [hdid],0x0 |
mov [hdpos],1 |
mov [fat32part],0 |
position_1_1: |
inc [fat32part] |
call search_and_read_image |
cmp [image_retrieved],1 |
je yes_sys_on_hd |
movzx eax,byte [0x40002] |
cmp [fat32part],eax |
jle position_1_1 |
position_2: |
test [0x40001],byte 0x10 |
jz position_3 |
mov [hdbase],0x1f0 |
mov [hdid],0x10 |
mov [hdpos],2 |
mov [fat32part],0 |
position_2_1: |
inc [fat32part] |
call search_and_read_image |
cmp [image_retrieved],1 |
je yes_sys_on_hd |
movzx eax,byte [0x40003] |
cmp eax,[fat32part] |
jle position_2_1 |
position_3: |
test [0x40001],byte 0x4 |
jz position_4 |
mov [hdbase],0x170 |
mov [hdid],0x0 |
mov [hdpos],3 |
mov [fat32part],0 |
position_3_1: |
inc [fat32part] |
call search_and_read_image |
cmp [image_retrieved],1 |
je yes_sys_on_hd |
movzx eax,byte [0x40004] |
cmp eax,[fat32part] |
jle position_3_1 |
position_4: |
test [0x40001],byte 0x1 |
jz no_sys_on_hd |
mov [hdbase],0x170 |
mov [hdid],0x10 |
mov [hdpos],4 |
mov [fat32part],0 |
position_4_1: |
inc [fat32part] |
call search_and_read_image |
cmp [image_retrieved],1 |
je yes_sys_on_hd |
movzx eax,byte [0x40005] |
cmp eax,[fat32part] |
jle position_4_1 |
jmp yes_sys_on_hd |
search_and_read_image: |
; mov [0xfe10],dword 0 ; entries in hd cache |
call set_FAT32_variables |
mov edx, bootpath |
call read_image |
test eax, eax |
jz image_present |
mov edx, bootpath2 |
call read_image |
test eax, eax |
jz image_present |
ret |
image_present: |
mov [image_retrieved],1 |
ret |
read_image: |
mov eax, hdsysimage |
mov ebx, 1474560/512 |
mov ecx, 0x100000 |
mov esi, 0 |
mov edi, 12 |
call file_read |
ret |
image_retrieved db 0 |
counter_of_partitions db 0 |
no_sys_on_hd: |
yes_sys_on_hd: |